Electromechanical switches for use in electrical and electronic equipment - Part 1: Generic specification

This part of IEC 61020 specifies the terminology, symbols, test methods and other necessary information to provide consistency in detail specifications for electromechanical switches. This document relates to electromechanical switches intended for use in electrical and electronic appliances. Switches covered by this document: a) are devices which open, close, or change the connection of a circuit by the mechanical motion of conducting parts (contacts); b) have a maximum rated voltage of 480 V; c) have a maximum rated current of 63 A. This document does not include keyboards and keypads which are intended for use in information-handling systems. Electromechanical key switches can be included under the scope of this document. Switch families will be described in any detail specifications that reference this document. This document is a performance standard intended to describe evaluation methods to better clarify the capabilities of a switch. NOTE 1 Safety requirements for switches for household and similar fixed electrical installations are given in IEC 60669 (all parts). NOTE 2 Safety requirements for appliance switches are given in IEC 61058 (all parts).

Elektromechanische Schalter zur Verwendung in Geräten der Elektrotechnik und Elektronik – Teil 1: Fachgrundspezifikation

Interrupteurs électromécaniques pour équipements électriques et électroniques - Partie 1: Spécification générique

La présente partie de l’IEC 61020 spécifie la terminologie, les symboles, les méthodes d’essai et d’autres informations nécessaires pour assurer la cohérence des spécifications particulières applicables aux interrupteurs électromécaniques. Le présent document concerne les interrupteurs électromécaniques destinés à être utilisés dans les dispositifs électriques et électroniques. Les interrupteurs relevant du présent document: a) sont des dispositifs qui ouvrent, ferment ou commutent un circuit par le mouvement mécanique de leurs parties conductrices (contacts); b) ont une tension assignée maximale de 480 V; c) ont un courant assigné maximal de 63 A. Le présent document ne s’applique pas aux claviers prévus pour être utilisés dans les systèmes de traitement de l’information. Les interrupteurs électromécaniques à touche peuvent relever du domaine d’application du présent document. Les familles d’interrupteurs sont décrites dans des spécifications particulières faisant référence au présent document. Le présent document est une norme de qualité de fonctionnement destinée à décrire les méthodes d’appréciation afin de clarifier les capacités d’un interrupteur. NOTE 1 Les exigences relatives à la sécurité des interrupteurs pour installations électriques fixes domestiques et analogues sont données dans l’IEC 60669 (toutes les parties). NOTE 2 Les exigences relatives à la sécurité des interrupteurs pour appareils sont données dans l’IEC 61058 (toutes les parties).

Elektromehanska stikala za električno in elektronsko opremo - 1. del: Rodovna specifikacija (IEC 61020-1:2019)

Ta del standarda IEC 61020 določa terminologijo, simbole, preskusne metode in druge potrebne informacije, da se zagotovi doslednost v podrobnih specifikacijah za elektromehanska stikala. Ta dokument se nanaša na elektromehanska stikala, ki so namenjena uporabi v električnih in elektronskih napravah. Stikala, zajeta v tem dokumentu:
a) so naprave, ki odpirajo, zapirajo ali spreminjajo povezavo tokokroga z mehanskim premikanjem prevodnih delov (kontaktov);
b) imajo najvišjo nazivno napetost 480 V;
b) imajo najvišji nazivni tok 63 A.
Ta dokument ne vključuje tipkovnic in številčnic, ki so namenjene uporabi v sistemih za obdelavo informacij. Elektromehanska stikala na ključ se lahko vključi v področje uporabe tega dokumenta.
Družine stikal bodo opisane v podrobnih specifikacijah, ki se sklicujejo na ta dokument. Ta dokument je tehnični standard, ki opisuje metode ocenjevanja za boljšo pojasnitev zmogljivosti stikala.
OPOMBA 1: Varnostne zahteve za stikala za gospodinjske in podobne fiksne električne napeljave so podane v standardu IEC 60669 (vsi deli).
OPOMBA 2: Varnostne zahteve za stikala za aparate so podane v standardu IEC 61058 (vsi deli).

General Information

Status
Published
Publication Date
14-Mar-2019
Current Stage
6060 - Document made available
Due Date
15-Mar-2019
Completion Date
15-Mar-2019

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SLOVENSKI STANDARD
SIST EN IEC 61020-1:2019
01-julij-2019
Elektromehanska stikala za električno in elektronsko opremo - 1. del: Rodovna
specifikacija (IEC 61020-1:2019)

Electromechanical switches for use in electrical and electronic equipment - Part 1:

Generic specification (IEC 61020-1:2019)
Elektromechanische Schalter zur Verwendung in Geräten der Elektrotechnik und
Elektronik – Teil 1: Fachgrundspezifikation (IEC 61020-1:2019)

Interrupteurs électromécaniques pour équipements électriques et électroniques - Partie

1: Spécification générique (IEC 61020-1:2019)
Ta slovenski standard je istoveten z: EN IEC 61020-1:2019
ICS:
31.220.20 Stikala Switches
SIST EN IEC 61020-1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61020-1:2019
---------------------- Page: 2 ----------------------
SIST EN IEC 61020-1:2019
EUROPEAN STANDARD EN IEC 61020-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 31.220.20 Supersedes EN 61020-1:2009
English Version
Electromechanical switches for use in electrical and electronic
equipment - Part 1: Generic specification
(IEC 61020-1:2019)

Interrupteurs électromécaniques pour équipements Elektromechanische Schalter zur Verwendung in Geräten

électriques et électroniques - Partie 1: Spécification der Elektrotechnik und Elektronik - Teil 1:

générique Fachgrundspezifikation
(IEC 61020-1:2019) (IEC 61020-1:2019)

This European Standard was approved by CENELEC on 2019-02-20. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61020-1:2019 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61020-1:2019
EN IEC 61020-1:2019 (E)
European foreword

The text of document 23J/443/CDV, future edition 3 of IEC 61020-1, prepared by SC 23J "Switches for

appliances" of IEC/TC 23 "Electrical accessories" was submitted to the IEC-CENELEC parallel vote

and approved by CENELEC as EN IEC 61020-1:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-11-20

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-02-20

document have to be withdrawn
This document supersedes EN 61020-1:2009.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 61020-1:2019 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60062:2016 NOTE Harmonized as EN 60062:2016 (not modified)
IEC 60065 NOTE Harmonized as EN 60065
IEC 60068-3-13 NOTE Harmonized as EN 60068-3-13
IEC 60512 (series) NOTE Harmonized as EN IEC 60512 (series)
IEC 60664-1 NOTE Harmonized as EN 60664-1
IEC 60695-11-10 NOTE Harmonized as EN 60695-11-10
IEC 61190-1-3 NOTE Harmonized as EN IEC 61190-1-3
ISO/IEC 17050-1 NOTE Harmonized as EN ISO/IEC 17050-1
ISO/IEC 17050-2 NOTE Harmonized as EN ISO/IEC 17050-2
ISO 129-1 NOTE Harmonized as EN ISO 129-1
ISO 286-1 NOTE Harmonized as EN ISO 286-1
ISO 1101 NOTE Harmonized as EN ISO 1101
ISO 9001 NOTE Harmonized as EN ISO 9001
Under preparation. Stage at the time of publication: prEN ISO 129-1:2018.
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SIST EN IEC 61020-1:2019
EN IEC 61020-1:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60027 series Letter symbols to be used in electrical EN IEC 60027 series
technology
IEC 60050-581 - International Electrotechnical Vocabulary - Part - -
581: Electromechanical components for
electronic equipment
IEC 60068-1 2013 Environmental testing - Part 1: General and EN 60068-1 2014
guidance

IEC 60068-2-1 - Environmental testing - Part 2-1: Tests - Test A: EN 60068-2-1 -

Cold

IEC 60068-2-2 - Environmental testing - Part 2-2: Tests - Test B: EN 60068-2-2 -

Dry heat
IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - Test EN 60068-2-6 -
Fc: Vibration (sinusoidal)

IEC 60068-2-10 - Environmental testing - Part 2-10: Tests - Test J EN 60068-2-10 -

and guidance: Mould growth

IEC 60068-2-11 - Basic environmental testing procedures - Part EN 60068-2-11 -

2-11: Tests - Test Ka: Salt mist

IEC 60068-2-13 - Basic environmental testing procedures - Part EN 60068-2-13 -

2-13: Tests - Test M: Low air pressure

IEC 60068-2-14 - Environmental testing - Part 2-14: Tests - Test EN 60068-2-14 -

N: Change of temperature

IEC 60068-2-17 - Basic environmental testing procedures - Part EN 60068-2-17 -

2-17: Tests - Test Q: Sealing

IEC 60068-2-20 2008 Environmental testing - Part 2-20: Tests - Test EN 60068-2-20 2008

T: Test methods for solderability and resistance
to soldering heat of devices with leads

IEC 60068-2-21 - Environmental testing - Part 2-21: Tests - Test EN 60068-2-21 -

U: Robustness of terminations and integral
mounting devices

IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - Test EN 60068-2-27 -

Ea and guidance: Shock
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SIST EN IEC 61020-1:2019
EN IEC 61020-1:2019 (E)

IEC 60068-2-30 2005 Environmental testing - Part 2-30: Tests - Test EN 60068-2-30 2005

Db: Damp heat, cyclic (12 h + 12 h cycle)

IEC 60068-2-38 2009 Environmental testing - Part 2-38: Tests - Test EN 60068-2-38 2009

Z/AD: Composite temperature/humidity cyclic
test

IEC 60068-2-42 - Environmental testing - Part 2-42: Tests - Test EN 60068-2-42 -

Kc: Sulphur dioxide test for contacts and
connections

IEC 60068-2-43 - Environmental testing - Part 2-43: Tests - Test EN 60068-2-43 -

Kd: Hydrogen sulphide test for contacts and
connections

IEC 60068-2-45 - Basic environmental testing procedures - Part EN 60068-2-45 -

2-45: Tests - Test XA and guidance: Immersion
in cleaning solvents

IEC 60068-2-46 - Basic environmental testing procedures - Part HD 323.2.46 S1 -

2-46: Tests - Guidance to test Kd: Hydrogen
sulphide test for contacts and connections
IEC 60068-2-49 - Basic environmental testing procedures - Part - -
2-49: Tests - Guidance to test Kc: Sulphur
dioxide test for contacts and connections

IEC 60068-2-58 2015 Environmental testing - Part 2-58: Tests - Test EN 60068-2-58 2015

Td: Test methods for solderability, resistance to
dissolution of metallization and to soldering
heat of surface mounting devices (SMD)
+ A1 2017 + A1 2018

IEC 60068-2-61 1991 Environmental testing - Part 2-61: Test methods EN 60068-2-61 1993

- Test Z/ABDM: Climatic sequence

IEC 60068-2-68 1994 Environmental testing - Part 2-68: Tests - Test EN 60068-2-68 1996

L: Dust and sand

IEC 60068-2-77 - Environmental testing - Part 2-77: Tests - Test EN 60068-2-77 -

77: Body strength and impact shock

IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test EN 60068-2-78 -

Cab: Damp heat, steady state
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60617 - Graphical symbols for diagrams (available at: - -
http://std.iec.ch/iec60617)

IEC 60721-3-3 - Classification of environmental conditions - Part EN 60721-3-3 -

3: Classification of groups of environmental
parameters and their severities - Section 3:
Stationary use at weather protected locations
IEC 61058-1 2016 Switches for appliances - Part 1: General EN IEC 61058-1 2018
requirements
IEC 61058-1-1 2016 Switches for appliances - Part 1-1: EN 61058-1-1 2016
Requirements for mechanical switches
ISO 80000-1 - Quantities and units - Part 1: General - -
---------------------- Page: 6 ----------------------
SIST EN IEC 61020-1:2019
IEC 61020-1
Edition 3.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electromechanical switches for use in electrical and electronic equipment –
Part 1: Generic specification
Interrupteurs électromécaniques pour équipements électriques et électroniques –
Partie 1: Spécification générique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.220.20 ISBN 978-2-8322-6388-4

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 61020-1:2019
– 2 – IEC 61020-1:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms, definitions, units and symbols ............................................................................ 11

3.1 Terms and definitions ............................................................................................ 11

3.2 Units and symbols................................................................................................. 13

4 Test and measurement procedures ................................................................................ 14

4.1 General ................................................................................................................. 14

4.1.1 General requirements to tests and measuring procedures ............................. 14

4.1.2 Tolerances .................................................................................................... 14

4.1.3 Preconditioning .............................................................................................. 14

4.1.4 Mounting ....................................................................................................... 14

4.2 Standard atmospheric conditions .......................................................................... 14

4.3 General examination ............................................................................................. 15

4.3.1 Visual examination ........................................................................................ 15

4.3.2 Dimensions .................................................................................................... 15

4.3.3 Dimensions, gauging ..................................................................................... 16

4.3.4 Mass ............................................................................................................. 16

4.3.5 Functional operation ...................................................................................... 17

4.3.6 Operating characteristics ............................................................................... 17

4.3.7 Contact bounce ............................................................................................. 21

4.4 Resistance measurements .................................................................................... 23

4.4.1 Contact resistance – Millivolt level ................................................................. 23

4.4.2 Contact resistance – Specified current ........................................................... 26

4.4.3 Resistance from actuator to mounting bushing (surface) ................................ 27

4.4.4 Insulation resistance ...................................................................................... 28

4.5 Withstand voltage ................................................................................................. 29

4.5.1 Withstand voltage at standard atmospheric conditions ................................... 29

4.5.2 Withstand voltage at low air pressure ............................................................ 30

4.6 Heating ................................................................................................................. 31

4.6.1 Object ............................................................................................................ 31

4.6.2 Method .......................................................................................................... 31

4.6.3 Requirement .................................................................................................. 31

4.6.4 Items to be specified in the detail specification .............................................. 31

4.7 Dynamic stress ..................................................................................................... 32

4.7.1 Shock ............................................................................................................ 32

4.7.2 Vibration ........................................................................................................ 32

4.7.3 Contact disturbance ....................................................................................... 33

4.8 Mechanical strength .............................................................................................. 34

4.8.1 Robustness of actuator .................................................................................. 34

4.8.2 Robustness of mounting bushing ................................................................... 37

4.8.3 Robustness of screw mounting ...................................................................... 37

4.8.4 Robustness of terminations ........................................................................... 37

4.9 Mechanical endurance .......................................................................................... 38

4.9.1 Mechanical endurance – Standard atmospheric conditions ............................ 38

4.9.2 Mechanical endurance – Category temperature range ................................... 39

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SIST EN IEC 61020-1:2019
IEC 61020-1:2019 © IEC 2019 – 3 –

4.10 Electrical endurance ............................................................................................. 40

4.10.1 Electrical endurance – Standard atmospheric conditions ............................... 40

4.10.2 Electrical endurance – Upper category temperature ....................................... 42

4.10.3 Electrical endurance – Category temperature range ...................................... 43

4.10.4 Electrical endurance – low air pressure ......................................................... 43

4.10.5 Logic loads (TTL)........................................................................................... 44

4.10.6 Low level endurance test ............................................................................... 45

4.11 Overload ............................................................................................................... 46

4.11.1 Electrical overload ......................................................................................... 46

4.11.2 Capacitive load switching .............................................................................. 47

4.12 Environmental testing ........................................................................................... 48

4.12.1 Climatic sequence ......................................................................................... 48

4.12.2 Dry heat ........................................................................................................ 50

4.12.3 Cold............................................................................................................... 51

4.12.4 Damp heat, steady state ................................................................................ 53

4.12.5 Damp heat, cyclic .......................................................................................... 54

4.12.6 Rapid change of temperature ......................................................................... 56

4.12.7 Mould growth (resistance) .............................................................................. 57

4.12.8 Corrosion, industrial atmosphere ................................................................... 58

4.12.9 Dust and sand ............................................................................................... 62

4.12.10 Salt mist ........................................................................................................ 64

4.12.11 Contact resistance stability ............................................................................ 65

4.13 Soldering .............................................................................................................. 66

4.13.1 Solderability, wetting, solder bath method ...................................................... 66

4.13.2 Solderability, wetting, soldering iron method .................................................. 67

4.13.3 Solderability, dewetting .................................................................................. 68

4.13.4 Resistance to soldering heat, solder bath method .......................................... 68

4.13.5 Resistance to soldering heat, soldering iron method ...................................... 69

4.14 Panel seal ............................................................................................................. 70

4.14.1 General ......................................................................................................... 70

4.14.2 Drip – Proof ................................................................................................... 70

4.14.3 Splash – Proof ............................................................................................... 70

4.14.4 Immersion...................................................................................................... 71

4.14.5 Submersion ................................................................................................... 72

4.15 Enclosure seal ...................................................................................................... 73

4.15.1 General ......................................................................................................... 73

4.15.2 Watertight immersion ..................................................................................... 73

4.15.3 Resilient or hermetic seal .............................................................................. 74

4.16 Fluid resistance – Immersion in cleaning solvents (marking) ................................. 74

4.16.1 Object ............................................................................................................ 74

4.16.2 Method .......................................................................................................... 74

4.16.3 Requirement .................................................................................................. 75

4.16.4 Items to be specified in the detail specification .............................................. 75

4.17 Fire hazard ........................................................................................................... 75

4.18 Capacitance .......................................................................................................... 75

4.18.1 Object ............................................................................................................ 75

4.18.2 Method .......................................................................................................... 75

4.18.3 Requirement .................................................................................................. 75

4.18.4 Items to be specified in the detail specification .............................................. 75

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SIST EN IEC 61020-1:2019
– 4 – IEC 61020-1:2019 © IEC 2019

4.19 Illumination ........................................................................................................... 76

4.19.1 Chromaticity .................................................................................................. 76

4.19.2 Transmittancy ................................................................................................ 76

4.19.3 Temperature of illuminated surface ................................................................ 77

4.20 Soldering for surface mounting switches ............................................................... 77

4.20.1 Solderability, solder bath method (surface mounting switches) ...................... 77

4.20.2 Solderability, reflow method (surface mounting switches) .............................. 78

4.20.3 Solderability, soldering iron method (surface mounting switches) ................... 79

4.20.4 Resistance to soldering heat, solder bath method (surface mounting

switches) ....................................................................................................... 80

4.20.5 Resistance to soldering heat, reflow method (surface mounting switches) ..... 80

4.20.6 Resistance to soldering heat, soldering iron method (surface mounting

switches) ....................................................................................................... 81

4.21 Mechanical strength (surface mounting switches) ................................................. 82

4.21.1 Substrate bending (surface mounting switches) ............................................. 82

4.21.2 Pull-off and push-off (surface mounting switches) .......................................... 82

4.21.3 Shear (surface mounting switches) ................................................................ 83

4.21.4 Body strength (surface mounting switches) .................................................... 84

5 Preferred values ............................................................................................................ 84

5.1 General ................................................................................................................. 84

5.2 Clearance and creepage distances ....................................................................... 84

6 Marking ......................................................................................................................... 85

6.1 Markings on switch body ....................................................................................... 85

6.2 Markings on packaging ......................................................................................... 85

Bibliography .......................................................................................................................... 86

Figure 1 – Measuring direction of operating force and torque ................................................ 18

Figure 2 – Example of measuring points specified in detail specifications ............................. 20

Figure 3 – Contact bounce test circuit ................................................................................... 22

Figure 4 – Typical trace of contact bounce ............................................................................ 22

Figure 5 – Low voltage and current method (by DC) ............................................................. 25

Figure 6 – Low voltage and current method (by AC) .............................................................. 25

Figure 7 – Specified current method (by DC) ........................................................................ 27

Figure 8 – Specified current method (by AC) ......................................................................... 27

Figure 9 – Application of forces and torques for 4.8.1 ........................................................... 36

Figure 10 – Composition of one cycle ................................................................................... 56

Figure 11 – Composition of cycle of test procedure ............................................................... 63

Figure 12 – Submersion seal enclosure ................................................................................ 73

Table 1 – Torque values for mounting screws ....................................................................... 37

Table 2 – Climatic sequence ................................................................................................. 49

Table 3 – ......................................................................................................... 49

Remain cycles

Table 4 – Concentration of H S ............................................................................................ 59

Table 5 – Test temperature ................................................................................................... 59

Table 6 – Test duration ......................................................................................................... 59

Table 7 – Concentration of SO ............................................................................................ 61

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SIST EN IEC 61020-1:2019
IEC 61020-1:2019 © IEC 2019 – 5 –

Table 8 – Test temperature ................................................................................................... 61

Table 9 – Test duration ......................................................................................................... 61

Table 10 – Solderability, bath method: Test severities (duration and temperature) ................ 67

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SIST EN IEC 61020-1:2019
– 6 – IEC 61020-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMECHANICAL SWITCHES
FOR USE IN ELECTRICAL AND ELECTRONIC EQUIPMENT –
Part 1: Generic specification
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each techni
...

SLOVENSKI STANDARD
SIST EN 61020-1:2019
01-julij-2019
Elektromehanska stikala za električno in elektronsko opremo - 1. del: Rodovna
specifikacija (IEC 61020-1:2019)

Electromechanical switches for use in electrical and electronic equipment - Part 1:

Generic specification (IEC 61020-1:2019)
Elektromechanische Schalter zur Verwendung in Geräten der Elektrotechnik und
Elektronik – Teil 1: Fachgrundspezifikation (IEC 61020-1:2019)

Interrupteurs électromécaniques pour équipements électriques et électroniques - Partie

1: Spécification générique (IEC 61020-1:2019)
Ta slovenski standard je istoveten z: EN IEC 61020-1:2019
ICS:
31.220.20 Stikala Switches
SIST EN 61020-1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61020-1:2019
---------------------- Page: 2 ----------------------
SIST EN 61020-1:2019
EUROPEAN STANDARD EN IEC 61020-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 31.220.20 Supersedes EN 61020-1:2009
English Version
Electromechanical switches for use in electrical and electronic
equipment - Part 1: Generic specification
(IEC 61020-1:2019)

Interrupteurs électromécaniques pour équipements Elektromechanische Schalter zur Verwendung in Geräten

électriques et électroniques - Partie 1: Spécification der Elektrotechnik und Elektronik - Teil 1:

générique Fachgrundspezifikation
(IEC 61020-1:2019) (IEC 61020-1:2019)

This European Standard was approved by CENELEC on 2019-02-20. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61020-1:2019 E
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SIST EN 61020-1:2019
EN IEC 61020-1:2019 (E)
European foreword

The text of document 23J/443/CDV, future edition 3 of IEC 61020-1, prepared by SC 23J "Switches for

appliances" of IEC/TC 23 "Electrical accessories" was submitted to the IEC-CENELEC parallel vote

and approved by CENELEC as EN IEC 61020-1:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-11-20

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-02-20

document have to be withdrawn
This document supersedes EN 61020-1:2009.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 61020-1:2019 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60062:2016 NOTE Harmonized as EN 60062:2016 (not modified)
IEC 60065 NOTE Harmonized as EN 60065
IEC 60068-3-13 NOTE Harmonized as EN 60068-3-13
IEC 60512 (series) NOTE Harmonized as EN IEC 60512 (series)
IEC 60664-1 NOTE Harmonized as EN 60664-1
IEC 60695-11-10 NOTE Harmonized as EN 60695-11-10
IEC 61190-1-3 NOTE Harmonized as EN IEC 61190-1-3
ISO/IEC 17050-1 NOTE Harmonized as EN ISO/IEC 17050-1
ISO/IEC 17050-2 NOTE Harmonized as EN ISO/IEC 17050-2
ISO 129-1 NOTE Harmonized as EN ISO 129-1
ISO 286-1 NOTE Harmonized as EN ISO 286-1
ISO 1101 NOTE Harmonized as EN ISO 1101
ISO 9001 NOTE Harmonized as EN ISO 9001
Under preparation. Stage at the time of publication: prEN ISO 129-1:2018.
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SIST EN 61020-1:2019
EN IEC 61020-1:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60027 series Letter symbols to be used in electrical EN IEC 60027 series
technology
IEC 60050-581 - International Electrotechnical Vocabulary - Part - -
581: Electromechanical components for
electronic equipment
IEC 60068-1 2013 Environmental testing - Part 1: General and EN 60068-1 2014
guidance

IEC 60068-2-1 - Environmental testing - Part 2-1: Tests - Test A: EN 60068-2-1 -

Cold

IEC 60068-2-2 - Environmental testing - Part 2-2: Tests - Test B: EN 60068-2-2 -

Dry heat
IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - Test EN 60068-2-6 -
Fc: Vibration (sinusoidal)

IEC 60068-2-10 - Environmental testing - Part 2-10: Tests - Test J EN 60068-2-10 -

and guidance: Mould growth

IEC 60068-2-11 - Basic environmental testing procedures - Part EN 60068-2-11 -

2-11: Tests - Test Ka: Salt mist

IEC 60068-2-13 - Basic environmental testing procedures - Part EN 60068-2-13 -

2-13: Tests - Test M: Low air pressure

IEC 60068-2-14 - Environmental testing - Part 2-14: Tests - Test EN 60068-2-14 -

N: Change of temperature

IEC 60068-2-17 - Basic environmental testing procedures - Part EN 60068-2-17 -

2-17: Tests - Test Q: Sealing

IEC 60068-2-20 2008 Environmental testing - Part 2-20: Tests - Test EN 60068-2-20 2008

T: Test methods for solderability and resistance
to soldering heat of devices with leads

IEC 60068-2-21 - Environmental testing - Part 2-21: Tests - Test EN 60068-2-21 -

U: Robustness of terminations and integral
mounting devices

IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - Test EN 60068-2-27 -

Ea and guidance: Shock
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SIST EN 61020-1:2019
EN IEC 61020-1:2019 (E)

IEC 60068-2-30 2005 Environmental testing - Part 2-30: Tests - Test EN 60068-2-30 2005

Db: Damp heat, cyclic (12 h + 12 h cycle)

IEC 60068-2-38 2009 Environmental testing - Part 2-38: Tests - Test EN 60068-2-38 2009

Z/AD: Composite temperature/humidity cyclic
test

IEC 60068-2-42 - Environmental testing - Part 2-42: Tests - Test EN 60068-2-42 -

Kc: Sulphur dioxide test for contacts and
connections

IEC 60068-2-43 - Environmental testing - Part 2-43: Tests - Test EN 60068-2-43 -

Kd: Hydrogen sulphide test for contacts and
connections

IEC 60068-2-45 - Basic environmental testing procedures - Part EN 60068-2-45 -

2-45: Tests - Test XA and guidance: Immersion
in cleaning solvents

IEC 60068-2-46 - Basic environmental testing procedures - Part HD 323.2.46 S1 -

2-46: Tests - Guidance to test Kd: Hydrogen
sulphide test for contacts and connections
IEC 60068-2-49 - Basic environmental testing procedures - Part - -
2-49: Tests - Guidance to test Kc: Sulphur
dioxide test for contacts and connections

IEC 60068-2-58 2015 Environmental testing - Part 2-58: Tests - Test EN 60068-2-58 2015

Td: Test methods for solderability, resistance to
dissolution of metallization and to soldering
heat of surface mounting devices (SMD)
+ A1 2017 + A1 2018

IEC 60068-2-61 1991 Environmental testing - Part 2-61: Test methods EN 60068-2-61 1993

- Test Z/ABDM: Climatic sequence

IEC 60068-2-68 1994 Environmental testing - Part 2-68: Tests - Test EN 60068-2-68 1996

L: Dust and sand

IEC 60068-2-77 - Environmental testing - Part 2-77: Tests - Test EN 60068-2-77 -

77: Body strength and impact shock

IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test EN 60068-2-78 -

Cab: Damp heat, steady state
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60617 - Graphical symbols for diagrams (available at: - -
http://std.iec.ch/iec60617)

IEC 60721-3-3 - Classification of environmental conditions - Part EN 60721-3-3 -

3: Classification of groups of environmental
parameters and their severities - Section 3:
Stationary use at weather protected locations
IEC 61058-1 2016 Switches for appliances - Part 1: General EN IEC 61058-1 2018
requirements
IEC 61058-1-1 2016 Switches for appliances - Part 1-1: EN 61058-1-1 2016
Requirements for mechanical switches
ISO 80000-1 - Quantities and units - Part 1: General - -
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SIST EN 61020-1:2019
IEC 61020-1
Edition 3.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electromechanical switches for use in electrical and electronic equipment –
Part 1: Generic specification
Interrupteurs électromécaniques pour équipements électriques et électroniques –
Partie 1: Spécification générique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.220.20 ISBN 978-2-8322-6388-4

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61020-1:2019
– 2 – IEC 61020-1:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms, definitions, units and symbols ............................................................................ 11

3.1 Terms and definitions ............................................................................................ 11

3.2 Units and symbols................................................................................................. 13

4 Test and measurement procedures ................................................................................ 14

4.1 General ................................................................................................................. 14

4.1.1 General requirements to tests and measuring procedures ............................. 14

4.1.2 Tolerances .................................................................................................... 14

4.1.3 Preconditioning .............................................................................................. 14

4.1.4 Mounting ....................................................................................................... 14

4.2 Standard atmospheric conditions .......................................................................... 14

4.3 General examination ............................................................................................. 15

4.3.1 Visual examination ........................................................................................ 15

4.3.2 Dimensions .................................................................................................... 15

4.3.3 Dimensions, gauging ..................................................................................... 16

4.3.4 Mass ............................................................................................................. 16

4.3.5 Functional operation ...................................................................................... 17

4.3.6 Operating characteristics ............................................................................... 17

4.3.7 Contact bounce ............................................................................................. 21

4.4 Resistance measurements .................................................................................... 23

4.4.1 Contact resistance – Millivolt level ................................................................. 23

4.4.2 Contact resistance – Specified current ........................................................... 26

4.4.3 Resistance from actuator to mounting bushing (surface) ................................ 27

4.4.4 Insulation resistance ...................................................................................... 28

4.5 Withstand voltage ................................................................................................. 29

4.5.1 Withstand voltage at standard atmospheric conditions ................................... 29

4.5.2 Withstand voltage at low air pressure ............................................................ 30

4.6 Heating ................................................................................................................. 31

4.6.1 Object ............................................................................................................ 31

4.6.2 Method .......................................................................................................... 31

4.6.3 Requirement .................................................................................................. 31

4.6.4 Items to be specified in the detail specification .............................................. 31

4.7 Dynamic stress ..................................................................................................... 32

4.7.1 Shock ............................................................................................................ 32

4.7.2 Vibration ........................................................................................................ 32

4.7.3 Contact disturbance ....................................................................................... 33

4.8 Mechanical strength .............................................................................................. 34

4.8.1 Robustness of actuator .................................................................................. 34

4.8.2 Robustness of mounting bushing ................................................................... 37

4.8.3 Robustness of screw mounting ...................................................................... 37

4.8.4 Robustness of terminations ........................................................................... 37

4.9 Mechanical endurance .......................................................................................... 38

4.9.1 Mechanical endurance – Standard atmospheric conditions ............................ 38

4.9.2 Mechanical endurance – Category temperature range ................................... 39

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SIST EN 61020-1:2019
IEC 61020-1:2019 © IEC 2019 – 3 –

4.10 Electrical endurance ............................................................................................. 40

4.10.1 Electrical endurance – Standard atmospheric conditions ............................... 40

4.10.2 Electrical endurance – Upper category temperature ....................................... 42

4.10.3 Electrical endurance – Category temperature range ...................................... 43

4.10.4 Electrical endurance – low air pressure ......................................................... 43

4.10.5 Logic loads (TTL)........................................................................................... 44

4.10.6 Low level endurance test ............................................................................... 45

4.11 Overload ............................................................................................................... 46

4.11.1 Electrical overload ......................................................................................... 46

4.11.2 Capacitive load switching .............................................................................. 47

4.12 Environmental testing ........................................................................................... 48

4.12.1 Climatic sequence ......................................................................................... 48

4.12.2 Dry heat ........................................................................................................ 50

4.12.3 Cold............................................................................................................... 51

4.12.4 Damp heat, steady state ................................................................................ 53

4.12.5 Damp heat, cyclic .......................................................................................... 54

4.12.6 Rapid change of temperature ......................................................................... 56

4.12.7 Mould growth (resistance) .............................................................................. 57

4.12.8 Corrosion, industrial atmosphere ................................................................... 58

4.12.9 Dust and sand ............................................................................................... 62

4.12.10 Salt mist ........................................................................................................ 64

4.12.11 Contact resistance stability ............................................................................ 65

4.13 Soldering .............................................................................................................. 66

4.13.1 Solderability, wetting, solder bath method ...................................................... 66

4.13.2 Solderability, wetting, soldering iron method .................................................. 67

4.13.3 Solderability, dewetting .................................................................................. 68

4.13.4 Resistance to soldering heat, solder bath method .......................................... 68

4.13.5 Resistance to soldering heat, soldering iron method ...................................... 69

4.14 Panel seal ............................................................................................................. 70

4.14.1 General ......................................................................................................... 70

4.14.2 Drip – Proof ................................................................................................... 70

4.14.3 Splash – Proof ............................................................................................... 70

4.14.4 Immersion...................................................................................................... 71

4.14.5 Submersion ................................................................................................... 72

4.15 Enclosure seal ...................................................................................................... 73

4.15.1 General ......................................................................................................... 73

4.15.2 Watertight immersion ..................................................................................... 73

4.15.3 Resilient or hermetic seal .............................................................................. 74

4.16 Fluid resistance – Immersion in cleaning solvents (marking) ................................. 74

4.16.1 Object ............................................................................................................ 74

4.16.2 Method .......................................................................................................... 74

4.16.3 Requirement .................................................................................................. 75

4.16.4 Items to be specified in the detail specification .............................................. 75

4.17 Fire hazard ........................................................................................................... 75

4.18 Capacitance .......................................................................................................... 75

4.18.1 Object ............................................................................................................ 75

4.18.2 Method .......................................................................................................... 75

4.18.3 Requirement .................................................................................................. 75

4.18.4 Items to be specified in the detail specification .............................................. 75

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SIST EN 61020-1:2019
– 4 – IEC 61020-1:2019 © IEC 2019

4.19 Illumination ........................................................................................................... 76

4.19.1 Chromaticity .................................................................................................. 76

4.19.2 Transmittancy ................................................................................................ 76

4.19.3 Temperature of illuminated surface ................................................................ 77

4.20 Soldering for surface mounting switches ............................................................... 77

4.20.1 Solderability, solder bath method (surface mounting switches) ...................... 77

4.20.2 Solderability, reflow method (surface mounting switches) .............................. 78

4.20.3 Solderability, soldering iron method (surface mounting switches) ................... 79

4.20.4 Resistance to soldering heat, solder bath method (surface mounting

switches) ....................................................................................................... 80

4.20.5 Resistance to soldering heat, reflow method (surface mounting switches) ..... 80

4.20.6 Resistance to soldering heat, soldering iron method (surface mounting

switches) ....................................................................................................... 81

4.21 Mechanical strength (surface mounting switches) ................................................. 82

4.21.1 Substrate bending (surface mounting switches) ............................................. 82

4.21.2 Pull-off and push-off (surface mounting switches) .......................................... 82

4.21.3 Shear (surface mounting switches) ................................................................ 83

4.21.4 Body strength (surface mounting switches) .................................................... 84

5 Preferred values ............................................................................................................ 84

5.1 General ................................................................................................................. 84

5.2 Clearance and creepage distances ....................................................................... 84

6 Marking ......................................................................................................................... 85

6.1 Markings on switch body ....................................................................................... 85

6.2 Markings on packaging ......................................................................................... 85

Bibliography .......................................................................................................................... 86

Figure 1 – Measuring direction of operating force and torque ................................................ 18

Figure 2 – Example of measuring points specified in detail specifications ............................. 20

Figure 3 – Contact bounce test circuit ................................................................................... 22

Figure 4 – Typical trace of contact bounce ............................................................................ 22

Figure 5 – Low voltage and current method (by DC) ............................................................. 25

Figure 6 – Low voltage and current method (by AC) .............................................................. 25

Figure 7 – Specified current method (by DC) ........................................................................ 27

Figure 8 – Specified current method (by AC) ......................................................................... 27

Figure 9 – Application of forces and torques for 4.8.1 ........................................................... 36

Figure 10 – Composition of one cycle ................................................................................... 56

Figure 11 – Composition of cycle of test procedure ............................................................... 63

Figure 12 – Submersion seal enclosure ................................................................................ 73

Table 1 – Torque values for mounting screws ....................................................................... 37

Table 2 – Climatic sequence ................................................................................................. 49

Table 3 – ......................................................................................................... 49

Remain cycles

Table 4 – Concentration of H S ............................................................................................ 59

Table 5 – Test temperature ................................................................................................... 59

Table 6 – Test duration ......................................................................................................... 59

Table 7 – Concentration of SO ............................................................................................ 61

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SIST EN 61020-1:2019
IEC 61020-1:2019 © IEC 2019 – 5 –

Table 8 – Test temperature ................................................................................................... 61

Table 9 – Test duration ......................................................................................................... 61

Table 10 – Solderability, bath method: Test severities (duration and temperature) ................ 67

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SIST EN 61020-1:2019
– 6 – IEC 61020-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMECHANICAL SWITCHES
FOR USE IN ELECTRICAL AND ELECTRONIC EQUIPMENT –
Part 1: Generic specification
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representati

...

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