High Frequency Inductive Components - Part 1: Fixed surface mount inductors for use in electronic and telecommunication equipment

This part of IEC 62674 applies to fixed surface mount inductors and ferrite beads. The object of this standard is to define the terms necessary to describe the inductors covered by this standard, provide recommendations for preferred characteristics, recommended performance, test methods and general guidance.

Induktive Hochfrequenzbauelemente - Teil 1: Oberflächenmontierbare Festinduktivität für den Einsatz in Elektronik und Telekommunikationsgeräten

Composants inductifs à haute fréquence - Partie 1: Inductances fixes pour montage en surface utilisées dans les matériels électroniques et les équipements de télécommunications

La CEI 62674-1:2012 s'applique aux inductances fixes pour montage en surface et aux perles de ferrite. La présente norme a pour objet de définir les termes nécessaires pour décrire les inductances couvertes par la présente norme, donner les recommandations pour les caractéristiques préférentielles, les performances recommandées, les méthodes d'essai et les lignes directrices générales.

Visokofrekvenčni induktivni sestavni deli - 1. del: Fiksne dušilke za površinsko montažo za elektronsko in telekomunikacijsko opremo

Ta del standarda IEC 62674 velja za fiksne dušilke za površinsko montažo in feritne obroče. Cilj tega standarda je opredelitev izrazov, ki so potrebni za opis dušilk, ki jih obravnava ta standard, podajanje predlogov za priporočene lastnosti, priporočeno zmogljivost, preskusne metode in splošne napotke.

General Information

Status
Published
Publication Date
12-Feb-2013
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Jan-2013
Due Date
18-Mar-2013
Completion Date
13-Feb-2013

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SLOVENSKI STANDARD
SIST EN 62674-1:2013
01-marec-2013
9LVRNRIUHNYHQþQLLQGXNWLYQLVHVWDYQLGHOLGHO)LNVQHGXãLONH]DSRYUãLQVNR
PRQWDåR]DHOHNWURQVNRLQWHOHNRPXQLNDFLMVNRRSUHPR

High Frequency Inductive Components - Part 1: Fixed surface mount inductors for use in

electronic and telecommunication equipment

Induktive Hochfrequenzbauelemente - Teil 1: Oberflächenmontierbare Festinduktivität für

den Einsatz in Elektronik und Telekommunikationsgeräten

Composants inductifs à haute fréquence - Partie 1: Inductances fixes pour montage en

surface utilisées dans les matériels électroniques et les équipements de
télécommunications
Ta slovenski standard je istoveten z: EN 62674-1:2012
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 62674-1:2013 en

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

---------------------- Page: 1 ----------------------
SIST EN 62674-1:2013
---------------------- Page: 2 ----------------------
SIST EN 62674-1:2013
EUROPEAN STANDARD
EN 62674-1
NORME EUROPÉENNE
December 2012
EUROPÄISCHE NORM
ICS 29.100.10
English version
High frequency inductive components -
Part 1: Fixed surface mount inductors for use in electronic and
telecommunication equipment
(IEC 62674-1:2012)
Composants inductifs à haute fréquence - Induktive Hochfrequenzbauelemente -
Partie 1: Inductances fixes pour montage Teil 1: Oberflächenmontierbare
en surface utilisées dans les matériels Festinduktivität für den Einsatz in
électroniques et les équipements de Elektronik und
télécommunications Telekommunikationsgeräten
(CEI 62674-1:2012) (IEC 62674-1:2012)

This European Standard was approved by CENELEC on 2012-11-16. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62674-1:2012 E
---------------------- Page: 3 ----------------------
SIST EN 62674-1:2013
EN 62674-1:2012 - 2 -
Foreword

The text of document 51/1006/FDIS, future edition 1 of IEC 62674-1, prepared by IEC TC 51, "Magnetic

components and ferrite materials" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN 62674-1:2012.
The following dates are fixed:
• latest date by which the document has (dop) 2013-08-16
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-11-16
• latest date by which the national
standards conflicting with the
document have to be withdrawn

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

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.
Endorsement notice

The text of the International Standard IEC 62674-1:2012 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 62674-1:2013
- 3 - EN 62674-1:2012
Annex ZA
(normative)
Normative references to i nternational publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
+ corr. October 1988 Part 1: General and guidance
IEC 60068-2-1 2007 Environmental testing - EN 60068-2-1 2007
Part 2-1: Tests - Test A: Cold
IEC 60068-2-2 2007 Environmental testing - EN 60068-2-2 2007
Part 2-2: Tests - Test B: Dry heat
IEC 60068-2-14 2009 Environmental testing - EN 60068-2-14 2009
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-45 - Environmental testing - EN 60068-2-45 -
Part 2: Tests - Test Xa and guidance:
Immersion in cleaning solvents
IEC 60068-2-58 2004 Environmental testing - EN 60068-2-58 2004
Part 2-58: Tests - Test Td: Test methods for + corr. December 2004
solderability, resistance to dissolution of
metallization and to soldering heat of surface
mounting devices (SMD)
IEC 60068-2-78 - Environmental testing - EN 60068-2-78 -
Part 2-78: Tests - Test Cab: Damp heat,
steady state
IEC 61605 2005 Fixed inductors for use in electronic and EN 61605 2005
telecommunication equipment - Marking
codes
IEC 62024-1 2008 High frequency inductive components - EN 62024-1 2008
+ corr. July 2008 Electrical characteristics and measuring
methods -
Part 1: Nanohenry range chip inductor
IEC 62024-2 2008 High frequency inductive components - EN 62024-2 2009
Electrical characteristics and measuring
methods -
Part 2: Rated current of inductors for DC to
DC converters
IEC 62025-2 2005 High frequency inductive components - Non- EN 62025-2 2005
electrical characteristics and measuring
methods - Part 2: Test methods for non-
electrical characteristics
IEC 62211 2003 Inductive components - Reliability EN 62211 2004
management
ISO 3 - Preferred numbers - Series of preferred - -
numbers
EN 60068-1 includes A1 to IEC 60068-1+ corr. October .
---------------------- Page: 5 ----------------------
SIST EN 62674-1:2013
EN 62674-1:2012 - 4 -
Publication Year Title EN/HD Year
ISO 3599 - Vernier callipers reading to 0,1 and 0,05 mm - -
ISO 3611 - Geometrical product specifications (GPS) - EN ISO 3611 -
Dimensional measuring equipment:
Micrometers for external measurements -
Design and metrological characteristics
ISO 6906 - Vernier callipers reading to 0,02 mm - -
---------------------- Page: 6 ----------------------
SIST EN 62674-1:2013
IEC 62674-1
Edition 1.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High frequency inductive components –
Part 1: Fixed surface mount inductors for use in electronic and
telecommunication equipment
Composants inductifs à haute fréquence –
Partie 1: Inductances fixes pour montage en surface utilisées dans les matériels
électroniques et les équipements de télécommunications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.100.10 ISBN 978-2-83220-399-6

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 62674-1:2013
– 2 – 62674-1  IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope ............................................................................................................................... 6

2 Normative references ....................................................................................................... 6

3 Terms and definitions ....................................................................................................... 7

4 Designation ...................................................................................................................... 7

5 Shape ............................................................................................................................... 9

6 Dimensions .................................................................................................................... 10

6.1 Shape D ................................................................................................................ 10

6.2 Shape K ................................................................................................................ 11

6.3 Tolerance for outline dimensions ........................................................................... 11

7 Ratings and characteristics............................................................................................. 11

7.1 Nominal inductance or impedance ......................................................................... 11

7.2 Tolerance for nominal inductance or impedance .................................................... 12

7.3 Operating temperature range ................................................................................. 12

8 Marking .......................................................................................................................... 13

9 Direction marking or shape of polarity............................................................................. 13

10 Tests and performance requirements .............................................................................. 14

10.1 Standard atmospheric conditions for testing .......................................................... 14

10.1.1 Standard atmospheric conditions for measurements and tests ................... 14

10.1.2 Referee condition ...................................................................................... 14

10.2 Visual examination and check of dimensions ......................................................... 14

10.2.1 Visual examination .................................................................................... 14

10.2.2 Dimensions................................................................................................ 14

10.3 Electrical performance tests .................................................................................. 15

10.3.1 Inductance ................................................................................................. 15

10.3.2 Q ............................................................................................................... 18

10.3.3 Impedance ................................................................................................. 22

10.3.4 Self-resonant frequency ............................................................................. 22

10.3.5 DC resistance ............................................................................................ 24

10.3.6 Rated current ............................................................................................ 25

10.4 Mechanical performance tests ............................................................................... 25

10.4.1 Mounting to substrate ................................................................................ 25

10.4.2 Body strength test ..................................................................................... 25

10.4.3 Robustness of terminations (electrodes) .................................................... 25

10.4.4 Solderability .............................................................................................. 26

10.4.5 Resistance to soldering heat...................................................................... 26

10.4.6 Resistance to dissolution of metallization .................................................. 26

10.4.7 Vibration .................................................................................................... 27

10.4.8 Resistance to shock .................................................................................. 27

10.5 Environmental and climatic tests ........................................................................... 27

10.5.1 Cold .......................................................................................................... 27

10.5.2 Dry heat .................................................................................................... 28

10.5.3 Change of temperature .............................................................................. 29

10.5.4 Damp heat (steady state) .......................................................................... 29

10.5.5 Component solvent resistance ................................................................... 30

---------------------- Page: 8 ----------------------
SIST EN 62674-1:2013
62674-1  IEC:2012 – 3 –

Bibliography .......................................................................................................................... 31

Figure 1 – Shapes of inductor and ferrite beads (examples) .................................................... 9

Figure 2 – Example of circuit for measurement by the bridge method .................................... 15

Figure 3 – Example of circuit for measurement by the vector voltage/current method ............ 16

Figure 4 – Example of a circuit for measurement by the automatic balancing bridge

method ................................................................................................................................. 17

Figure 5 – Example of circuit for measurement by the series resonance method ................... 19

Figure 6 – Example of a circuit for measurement by the parallel resonance method .............. 20

Figure 7 – Tuning characteristics of inductor ......................................................................... 20

Figure 8 – Example of circuit for measurement by the minimum output method ..................... 23

Figure 9 – Example of measuring circuit for DC resistance ................................................... 24

Table 1 – Letter code for inductance value .............................................................................. 8

Table 2 – Dimensions for shape D ........................................................................................ 10

Table 3 – Dimensions of height for shape D (R 20 series) ..................................................... 10

Table 4 – Dimensions of height for shape D less than 1,00 mm ............................................ 10

Table 5 – Dimensions for shape K ........................................................................................ 11

Table 6 – Tolerance for outline dimension and height ........................................................... 11

Table 7 – E 24 series for nominal inductance or impedance .................................................. 12

Table 8 – Tolerance for nominal inductance or impedance .................................................... 12

Table 9 – Temperatures to be selected for operating temperature ranges ............................. 12

Table 10 – User reference / Examples of application and operating temperature range ......... 13

Table 11 – Electrical performance ......................................................................................... 26

Table 12 – Combined test conditions for cold ........................................................................ 28

Table 13 – Combined test conditions for dry heat.................................................................. 28

Table 14 – Test conditions for change of temperature ........................................................... 29

Table 15 – Test conditions for damp heat (steady state) ....................................................... 30

---------------------- Page: 9 ----------------------
SIST EN 62674-1:2013
– 4 – 62674-1  IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH FREQUENCY INDUCTIVE COMPONENTS –
Part 1: Fixed surface mount inductors for use in electronic
and telecommunication equipment
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 62674-1 has been prepared by IEC technical committee 51:

Magnetic components and ferrite materials.
The text of this standard is based on the following documents:
FDIS Report on voting
51/1006/FDIS 51/1009/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

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

---------------------- Page: 10 ----------------------
SIST EN 62674-1:2013
62674-1  IEC:2012 – 5 –

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

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 11 ----------------------
SIST EN 62674-1:2013
– 6 – 62674-1  IEC:2012
HIGH FREQUENCY INDUCTIVE COMPONENTS –
Part 1: Fixed surface mount inductors for use in electronic
and telecommunication equipment
1 Scope

This part of IEC 62674 applies to fixed surface mount inductors and ferrite beads.

The object of this standard is to define the terms necessary to describe the inductors covered

by this standard, provide recommendations for preferred characteristics, recommended

performance, test methods and general guidance.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat

IEC 60068-2-14:2009, Environmental testing – Part 2-14: Tests – Test N: Change of

temperature

IEC 60068-2-45, Basic environmental testing procedures – Part 2-45: Tests – Test XA and

guidance: Immersion in cleaning solvents

IEC 60068-2-58:2004, Environmental testing – Part 2-58: Tests – Test Td: Test methods for

solderability, resistance to dissolution of metallization and to soldering heat of surface

mounting devices (SMD)

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

state

IEC 61605:2005, Fixed inductors for use in electronic and telecommunication equipment –

Marking codes

IEC 62024-1:2008, High frequency inductive components – Electrical characteristics and

measuring methods – Part 1: Nanohenry range chip inductor

IEC 62024-2:2008, High frequency inductive components – Electrical characteristics and

measuring methods – Part 2: Rated current of inductors for DC to DC converters

IEC 62025-2:2005, High frequency inductive components – Non-electrical characteristics and

measuring methods – Part 2: Test methods for non-electrical characteristics
IEC 62211:2003, Inductive components – Reliability management
---------------------- Page: 12 ----------------------
SIST EN 62674-1:2013
62674-1  IEC:2012 – 7 –
ISO 3:1973, Preferred numbers – Series of preferred numbers
ISO 3599, Vernier callipers reading to 0,1 and 0,05 mm

ISO 3611, Geometrical product specifications (GPS) – Dimensional measuring equipment:

Micrometers for external measurements – Design and metrological characteristics
ISO 6906, Vernier callipers reading to 0,02 mm
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
rated current

maximum current which may be loaded continuously by inductors at the rated temperature

Note 1 to entry: A DC saturation limited current value or a temperature rise limited current value, whichever is

less, has been adopted as the rated current (see IEC 62024-2:2008, Clause 7).
3.2
operating temperature range
category temperature range

range of ambient temperatures for which the inductor has been designed to operate

continuously

Note 1 to entry: Unless otherwise specified in the detail specification, the operating temperature is ambient

temperature plus temperature rise of components.
4 Designation

It is recommended to express the designation of the fixed surface mount inductors by the

following 12 digits format. In the case of another format, designation shall be specified in the

detail specifications.

The designation of ferrite beads shall be specified in the detail specifications.

□□□ □□□□ □ □□□ □
a) b) c) d) e)
a) Identification of the type of inductor

Fixed surface mount inductors shall be identified by the three alphabetic characters ‘LCL’.

b) Indication of outline dimensions

The outline dimensions of the surface mount inductor shall be indicated by a four-digit

number based on two significant figures for each dimension of L and W (or H). As for the

dimensions of shape D, the first two digits indicate the longer side dimension L, and the

last two digits indicate the shorter side dimension W, as shown in Figure 1. As for the

dimensions of shape K, the first two digits indicate the outline dimension L, and the last

two digits indicate the height dimension H.
c) Indication of shape

A single alphabetic character as given in Figure 1 indicates the shape for fixed surface

mount inductors.
---------------------- Page: 13 ----------------------
SIST EN 62674-1:2013
– 8 – 62674-1  IEC:2012
The shape codes are classified by the base shape of inductors.
D: rectangular
K: square
d) Indication of nominal inductance

Three alphanumeric characters specified in IEC 61605:2005, Clause 4, indicate the

nominal inductance value (see Table 1).
Table 1 – Letter code for inductance value
Inductance values Digit and letter code
0,1 nH N10
0,47 nH N47
1 nH 1N0
4,7 nH 4N7
10 nH 10N
47 nH 47N
0,1 µH R10
R47
0,47 µH
1R0
1 µH
4R7
4,7 µH
100
10 µH
470
47 µH
101
100 µH
471
470 µH
102
1 mH
472
4,7 mH
103
10 mH
473
47 mH
104
100 mH
474
470 mH
105
1 H
475
4,7 H
106
10 H
476
47 H
e) Indication of tolerance for inductance

Single alphabetic characters specified in Table 8 indicate the tolerance for the inductance

value.
---------------------- Page: 14 ----------------------
SIST EN 62674-1:2013
62674-1  IEC:2012 – 9 –
5 Shape

The shapes of fixed surface mount inductors and ferrite beads are classified as shown in

Figure 1.
IEC 1855/12
Shape D
Shape K
IEC 1856/12
Figure 1 – Shapes of inductor and ferrite beads (examples)
---------------------- Page: 15 ----------------------
SIST EN 62674-1:2013
– 10 – 62674-1  IEC:2012
6 Dimensions
6.1 Shape D
For the dimensions for shape D, see a) and b).

a) Outline dimensions L (long side) and W (short side) of shape D shall be chosen from the

values marked with x in Table 2. These values have been selected from the R 20 series of

ISO 3:1973, but the values 0,315, 0,56 and 3,15 have been rounded off to 0,3, 0,6 and 3,2

respectively. 1,25 may be rounded off to 1,2.

b) Dimensions of height greater than 1,00 mm shall be chosen from Table 3. These values

are taken from the R 20 series of ISO 3:1973 where, however, the values 1,12, 2,24, 3,15

and 3,55 have been rounded off to 1,1, 1,2, 3,2 and 3,6 respectively. 1,25 may be rounded

off to 1,2. Dimensions of height, less than 1,00 mm, shall be selected from Table 4.

Table 2 – Dimensions for shape D
(short side)
(long side)
mm 1,25
0,2 0,3 0,4 0,5 0,8 1,0 1,6 1,8 2,0 2,5 3,2 4,0 5,0 5,6 6,3 7,1
(1,2)
0,4 X
0,6 X
0,8 X
1,0 X
1,2 X
1,6 X X
2,0 X X X
2,5 X X
3,2 X X X
4,0
4,5 X X X
5,0 X
5,6 X
6,3 X
7,1 X
8,0 X
Table 3 – Dimensions of height for shape D (R 20 series)
Dimensions in millimetres
1,25
1,0 1,1 1,4 1,6 1,8 2,0 2,2 2,5 2,8 3,2
(1,2)
3,6 4,0 4,5 5,0 5,6 6,3 7,1 8,0 9,0 10,0
Table 4 – Dimensions of height for shape D less than 1,00 mm
0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,85 0,9
---------------------- Page: 16 ----------------------
SIST EN 62674-1:2013
62674-1  IEC:2012 – 11 –
6.2 Shape K

Outline dimensions L and H of shape K shall be chosen from the values marked with x in

Table 5.These values are based on the R 20 series of ISO 3:1973.
Table 5 – Dimensions for shape K
(height)
(length)
0,6 0,8 0,9 1,0 1,1 1,2 1,4 1,6 1,8 2,0 2,2 2,5 3,2 4,0 4,5 5,0 6,3 7,1 8,0 9,0
2,5 X X X X
2,8 X X X X X
3,2 X X X X
...

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