Components for low-voltage surge protective devices - Part 331: Performance requirements and test methods for metal oxide varistors (MOV)

IEC 61643-331:2017E) is a test specification for metal oxide varistors (MOV), which are used for applications up to 1 000 V AC or 1 500 V DC in power line, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This specification applies to MOVs having two electrodes and hybrid overvoltage protection components. This specification also does not apply to mountings and their effect on the MOV’s characteristics. Characteristics given apply solely to the MOV mounted only in the ways described for the tests. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Update of the nominal varistor voltage test method; b) Addition of thermally protected varistors – component symbol and test methods; c) Addition of nominal discharge current – test methods; d) Addition of voltage ratings for disc types (Table 1); e) Addition of test currents for clamping voltage of disc types (Table 2); f) Addition of typical voltage ratings of SMD types (Table 3); and g) Addition of Limited current and temporary overvoltage tests for thermally protected varistors. Keywords: metal oxide varistors (MOV), high transient voltages.

Bauelemente für Überspannungsschutzgeräte für Niederspannung - Teil 331: Leistungsanforderungen und Prüfverfahren für Metalloxidvaristoren (MOV)

Composants pour protection par parafoudres basse tension - Partie 331: Exigences de performance et méthodes d’essai pour les varistances à oxyde métallique (MOV)

IEC 61643-331:2017 traite des spécifications d'essais relatifs aux varistances à oxyde métallique (VOM), utilisées pour des applications sur des lignes d'alimentation, de télécommunication ou des circuits de signalisation de 1 000 V CA ou 1 500 V CC au plus. Elles sont conçues pour protéger le matériel, le personnel ou les deux des tensions transitoires élevées. Ces spécifications s'appliquent aux VOM qui disposent de deux électrodes et de composants hybrides de protection contre la surtension. Par ailleurs, ces spécifications ne s'appliquent pas aux supports de fixation et à leur effet sur les caractéristiques des VOM. Les caractéristiques présentées ne s'appliquent qu'aux VOM montées selon les méthodes décrites pour les essais. Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) mise à jour de la méthode d'essai de tension nominale de varistance; b) ajout des varistances à protection thermique – symbole de composant et méthodes d'essai; c) ajout du courant nominal de décharge – méthodes d'essai; d) ajout de caractéristiques de tensions pour les types à disques (Tableau 1); e) ajout de courants d'essai pour la tension d'écrêtage des types à disques (Tableau 2); f) ajout de caractéristiques de tensions typiques des types de CMS (Tableau 3); et g) ajout d'essais en courants limités et surtensions temporaires pour les varistances à protection thermique. Mots clés : varistances à oxyde métallique (VOM), tensions transitoires élevées

Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 311. del: Zahteve za lastnosti in preskusne metode za kovinsko-oksidne varistorje (MOV)

V tem delu standarda IEC 61643 je obravnavana uporaba izolacijskih transformatorjev (SIT), ki se uporabljajo pri telekomunikacijskih transformatorjih z ravnmi signala do 400 V od vršne vrednosti do vršne vrednosti. Ti transformatorji imajo visoko nazivno udarno napetost z zaslonom med vhodnim in izhodnim navitjem ali brez njega. Izolacijski transformatorji (SIT) so komponente za zaščito pred prenapetostnimi udari in se uporabljajo za širjenje običajnega načina napetostnih udarov. V tem dokumentu so opisani izbor izolacijskih transformatorjev, načela uporabe in povezane informacije. Ta dokument ne obsega komunikacijskih transformatorjev elektroenergetskih vodov.

General Information

Status
Published
Publication Date
15-Mar-2018
Current Stage
6060 - Document made available
Due Date
23-Apr-2018

RELATIONS

Buy Standard

Standard
EN IEC 61643-331:2018 - BARVE na PDF-str 27,34
English language
44 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN IEC 61643-331:2018
01-maj-2018
1DGRPHãþD
SIST EN 61643-331:2003
6HVWDYQLGHOL]DQL]NRQDSHWRVWQHQDSUDYH]D]DãþLWRSUHGSUHQDSHWRVWQLPLXGDUL

GHO=DKWHYH]DODVWQRVWLLQSUHVNXVQHPHWRGH]DNRYLQVNRRNVLGQHYDULVWRUMH

029

Components for low-voltage surge protection - Part 331: Performance requirements and

test methods for metal oxide varistors (MOV)
Ta slovenski standard je istoveten z: EN IEC 61643-331:2018
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
31.040.20 Potenciometri, spremenljivi Potentiometers, variable
upori resistors
SIST EN IEC 61643-331:2018 en

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

---------------------- Page: 1 ----------------------
SIST EN IEC 61643-331:2018
---------------------- Page: 2 ----------------------
SIST EN IEC 61643-331:2018
EUROPEAN STANDARD EN IEC 61643-331
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 31.040 Supersedes EN 61643-331:2003
English Version
Components for low-voltage surge protective devices - Part 331:
Performance requirements and test methods for metal oxide
varistors (MOV)
(IEC 61643-331:2017)

Composants pour protection par parafoudres basse tension Bauelemente für Überspannungsschutzgeräte für

- Partie 331: Exigences de performance et méthodes Niederspannung - Teil 331: Leistungsanforderungen und

d’essai pour les varistances à oxyde métallique (MOV) Prüfverfahren für Metalloxidvaristoren (MOV)

(IEC 61643-331:2017) (IEC 61643-331:2017)

This European Standard was approved by CENELEC on 2018-01-11. 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

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61643-331:2018 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61643-331:2018
EN IEC 61643-331:2018 (E)
European foreword

The text of document 37B/160/FDIS future edition 2 of IEC 61643-331, prepared by IEC/SC 37B:

“Specific components for surge arresters and surge protective devices”, of IEC/TC 37: “Surge

arresters”, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC

61643-331:2018.
The following dates are fixed:
(dop) 2018-10-11
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-01-11
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61643-331:2003.

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 61643-331:2017 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 60068-2-6:2007 NOTE Harmonized as EN 60068-2-6:2008 (not modified).
IEC 60068-2-14:2009 NOTE Harmonized as EN 6008-2-14:2009 (not modified).
IEC 60068-2-29:1987 NOTE Harmonized as EN 6008-2-29:1993 (not modified).
IEC 60068-2-52:1996 NOTE Harmonized as EN 6008-2-52:1996 (not modified).
IEC 60060-1:2010 NOTE Harmonized as EN 60060-1:2010 (not modified).
IEC 61643-11:2011 NOTE Harmonized as EN 61643-11:2012 (not modified).
IEC 61051-1:2007 NOTE Harmonized as EN 61051-1:2008 (not modified).
---------------------- Page: 4 ----------------------
SIST EN IEC 61643-331:2018
EN IEC 61643-331:2018 (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 60068-1 2013 Environmental testing -- Part 1: General EN 60068-1 2014
and guidance

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

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

IEC 60068-2-21 2006 Environmental testing -- Part 2-21: Tests - EN 60068-2-21 2006

Test U: Robustness of terminations and
integral mounting devices

IEC 60068-2-78 2012 Environmental testing -- Part 2-78: Tests - EN 60068-2-78 2013

Test Cab: Damp heat, steady state

IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) -- Part EN 61000-4-2 2009

4-2: Testing and measurement techniques
- Electrostatic discharge immunity test

IEC 61643-11 (mod) 2011 Low-voltage surge protective devices -- EN 61643-11 2012

Part 11: Surge protective devices
connected to low-voltage power systems -
Requirements and test methods
- - + A11 2018
---------------------- Page: 5 ----------------------
SIST EN IEC 61643-331:2018
---------------------- Page: 6 ----------------------
SIST EN IEC 61643-331:2018
IEC 61643-331
Edition 2.0 2017-12
INTERNATIONAL
STANDARD
colour
inside
Components for low-voltage surge protective devices –
Part 331: Performance requirements and test methods for metal oxide varistors
(MOV)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.040.20 ISBN 978-2-8322-5095-2

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 61643-331:2018
– 2 – IEC 61643-331:2017 © IEC 2017
CONTENTS

CONTENTS ............................................................................................................................ 2

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms, definitions, symbols and abbreviated terms .......................................................... 7

3.1 Ratings ................................................................................................................... 8

3.2 Characteristics ........................................................................................................ 9

3.3 Symbols ................................................................................................................ 10

3.4 Abbreviated terms ................................................................................................. 11

4 Service conditions ......................................................................................................... 11

4.1 Operating and storage temperature ranges ........................................................... 11

4.2 Altitude or atmospheric pressure range ................................................................. 11

4.3 Relative Humidity .................................................................................................. 11

5 Mechanical requirements and materials ......................................................................... 12

5.1 Robustness of terminations ................................................................................... 12

5.2 Solderability .......................................................................................................... 12

5.3 Marking ................................................................................................................. 12

6 General ......................................................................................................................... 12

6.1 Failure rates ......................................................................................................... 12

6.2 Test standard atmospheric conditions ................................................................... 12

7 Electrical requirements .................................................................................................. 12

7.1 Nominal varistor voltage ....................................................................................... 12

7.2 Maximum AC (DC) continuous operating voltage................................................... 13

7.3 Standby current I ............................................................................................... 13

7.4 Capacitance .......................................................................................................... 13

7.5 Clamping voltage .................................................................................................. 13

7.6 Electrostatic discharge (ESD) (for SMD type MOV only)........................................ 15

7.7 Rated impulse energy (W ) ................................................................................. 15

7.8 Nominal discharge current I ................................................................................ 15

7.9 Endurance ............................................................................................................ 15

7.10 Limited current temporary overvoltage .................................................................. 15

8 Standard design test criteria .......................................................................................... 15

8.1 General ................................................................................................................. 15

8.2 Ratings ................................................................................................................. 15

8.2.1 Single-impulse maximum current (I ) .......................................................... 15

8.2.2 Next Impulse ................................................................................................. 16

8.2.3 Continuous rated voltage (V ) ....................................................................... 16

8.3 Electrical characteristics ....................................................................................... 16

8.3.1 Clamping voltage (V ) ................................................................................... 16

8.3.2 Standby current (I ) ...................................................................................... 17

8.3.3 Nominal varistor voltage (V ) ........................................................................ 17

8.3.4 Capacitance (C ) .......................................................................................... 17

8.4 Endurance ............................................................................................................ 18

8.5 ESD Test Method .................................................................................................. 18

9 Nominal discharge current and limited current temporary overvoltage............................ 18

---------------------- Page: 8 ----------------------
SIST EN IEC 61643-331:2018
IEC 61643-331:2017 © IEC 2017 – 3 –

9.1 Thermally protected varistors – Sequence of tests ................................................ 18

9.2 Temperature and humidity cycle conditioning ........................................................ 18

9.3 Nominal discharge current I(n) test description ..................................................... 19

9.3.1 General ......................................................................................................... 19

9.3.2 Pass/fail criteria ............................................................................................. 21

9.4 Limited current temporary overvoltage test description and procedure for

thermally protected varistors ................................................................................. 21

9.4.1 General ......................................................................................................... 21

9.4.2 Sample preparation ....................................................................................... 21

9.4.3 Test conditions .............................................................................................. 21

9.4.4 Pass/fail criteria ............................................................................................. 22

9.5 Dielectric testing ................................................................................................... 24

9.5.1 Test conditions .............................................................................................. 24

9.5.2 Setup from foil to leads .................................................................................. 24

9.5.3 Pass criteria .................................................................................................. 24

Annex A (informative) MOV testing according to IEC 61643-11:2011 – Surge

protective devices for the Class I, II and III .................................................................... 25

A.1 General ................................................................................................................. 25

A.2 MOV selection ...................................................................................................... 25

A.3 Cross reference list of abbreviations, descriptions and definitions ......................... 25

A.4 Operating duty test ............................................................................................... 26

A.4.1 General ......................................................................................................... 26

A.4.2 Measured limiting voltage .............................................................................. 28

A.4.3 Class I and II operating duty tests (8.3.4.3) ................................................... 31

A.4.4 Additional duty test for test class I ................................................................. 31

A.4.5 Class III operating duty tests ......................................................................... 32

A.4.6 Pass criteria for all operating duty tests and for the additional duty test

for test class I ................................................................................................ 33

A.4.7 Preferred parameters of impulse discharge current I used for Class I
imp

additional duty tests ....................................................................................... 33

A.4.8 Preferred values of impulse discharge current I used for Class I and

Class II residual voltage and operating duty tests .......................................... 33

A.4.9 Preferred values of combination waveshape used for Class III tests .............. 34

Annex B (informative) IEC 61051 Varistors for use in electronic equipment ......................... 36

Annex C (informative) Accelerated endurance screening test ............................................... 37

C.1 Accelerated endurance screening test .................................................................. 37

C.2 Preparation of sample ........................................................................................... 37

C.3 Test conditions ..................................................................................................... 37

C.4 Pass criteria .......................................................................................................... 38

Annex D (informative) Proposed test method for determination of mean time to failure

(MTTF) .......................................................................................................................... 39

D.1 Sampling plans ..................................................................................................... 39

D.2 Total test hours ..................................................................................................... 39

D.3 Samples................................................................................................................ 39

D.4 Intermediate measurements .................................................................................. 40

D.5 Failure criteria ....................................................................................................... 40

D.6 Acceptance criteria ............................................................................................... 40

Bibliography .......................................................................................................................... 41

---------------------- Page: 9 ----------------------
SIST EN IEC 61643-331:2018
– 4 – IEC 61643-331:2017 © IEC 2017

Figure 1 – V-I characteristic of a MOV .................................................................................. 10

Figure 2 – Symbol for MOV ................................................................................................... 10

Figure 3 – Symbol for thermally protected MOV .................................................................... 11

Figure 4 – Test circuit for impulse peak current clamping voltage (V ) at peak impulse

current (I ) ........................................................................................................................... 16

Figure 5 – Test circuit for measuring leakage current ............................................................ 17

Figure 6 – Test circuit for measuring nominal varistor voltage (V ) ....................................... 17

Figure 7 – Nominal Discharge Current Flowchart .................................................................. 20

Figure 8 – Sequence of the I Test ....................................................................................... 21

Figure 9 – Temporary Overvoltage Limited Current test procedure Flowchart........................ 23

Figure A.1 – Flow chart of the operating duty test ................................................................. 27

Figure A.2 – Test set-up for operating duty test .................................................................... 28

Figure A.3 – Flow chart of testing to determine the measured limiting voltage ....................... 30

Figure A.4 – Operating duty test timing diagram for test classes I and II ............................... 31

Figure A.5 – Additional duty test timing diagram for test class I ............................................ 32

Figure A.6 – Operating duty test timing diagram for test class III ........................................... 32

Figure C.1 – Circuit of accelerated ageing test ...................................................................... 37

Figure D.1 – Test Circuit of MTTF ......................................................................................... 40

Table 1 – Voltage ratings for disc types ................................................................................ 13

Table 2 – Typical Voltage Ratings for SMD types .................................................................. 14

Table A.1 – Comparison of IEC 61643-11 and IEC 61643-311 .............................................. 26

Table A.2 – Preferred parameters for class I test .................................................................. 33

Table A.3 – Preferred values for class I and class II tests ..................................................... 34

Table A.4 – Preferred values for class III tests ...................................................................... 35

Table D.1 – Sampling plans .................................................................................................. 39

---------------------- Page: 10 ----------------------
SIST EN IEC 61643-331:2018
IEC 61643-331:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 331: Performance requirements and test methods
for metal oxide varistors (MOV)
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 representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

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

International Standard IEC 61643-331 has been prepared by subcommittee 37B: Specific

components for surge arresters and surge protective devices, of IEC technical committee 37:

Surge arresters.

This second edition cancels and replaces the first edition published in 2003. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) Update of the nominal varistor voltage test method;

b) Addition of thermally protected varistors – component symbol and test methods;

c) Addition of nominal discharge current – test methods;
d) Addition of voltage ratings for disc types (Table 1);
---------------------- Page: 11 ----------------------
SIST EN IEC 61643-331:2018
– 6 – IEC 61643-331:2017 © IEC 2017
e) Addition of test currents for clamping voltage of disc types (Table 2);
f) Addition of typical voltage ratings of SMD types (Table 3); and

g) Addition of Limited current and temporary overvoltage tests for thermally protected

varistors.
The text of this International Standard is based on the following documents:
FDIS Report on voting
37B/160/FDIS 37B/164/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of IEC 61643 series, under the general title Components for low-voltage

surge protective devices, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 12 ----------------------
SIST EN IEC 61643-331:2018
IEC 61643-331:2017 © IEC 2017 – 7 –
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 331: Performance requirements and test methods
for metal oxide varistors (MOV)
1 Scope

This part of IEC 61643 is a test specification for metal oxide varistors (MOV), which are used

for applications up to 1 000 V AC or 1 500 V DC in power line, or telecommunication, or

signalling circuits. They are designed to protect apparatus or personnel, or both, from high

transient voltages.

This specification applies to MOVs having two electrodes and hybrid overvoltage protection

components. This specification also does not apply to mountings and their effect on the

MOV’s characteristics. Characteristics given apply solely to the MOV mounted only in the

ways described for the tests.
2 Normative references

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.
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance

IEC 60068-2-20:2008, Environmental testing – Part 2-20: Tests – Test T: Test methods for

solderability and resistance to soldering heat of devices with leads

IEC 60068-2-21:2006, Environmental testing – Part 2-21: Tests – Test U: Robustness of

terminations and integral mounting devices

IEC 60068-2-78:2012, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,

steady state

IEC 61643-11:2011, Low-voltage surge protective devices – Part 11: Surge protective devices

connected to low-voltage power systems – Requirements and test methods
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the following terms, definitions, symbols and abbreviated

terms apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.ele
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.