IEC 60938-2-1:1999

Fixed inductors for electromagnetic interference suppression - Part 2-1: Blank detail specification - Inductors for which safety tests are required - Assessment level D

IEC 60938-2-1:1999 is a supplementary document to the sectional specification and contains requirements for style, layout and minimum content of detail specifications. Detail specifications not complying with these requirements may not be considered as being in accordance with IEC specifications nor shall they so be described. In the preparation of detail specifications the content of 1.4 of the sectional specification shall be taken into account.

Inductances fixes d'antiparasitage - Partie 2-1: Spécification particulière cadre - Inductances nécessitant des essais de sécurité - Niveau d'évaluation D

L'IEC 60938-2-1:1999 est un document annexe à la spécification intermédiaire qui contient des exigences pour le modèle, la disposition et le contenu minimal des spécifications particulières. Les spécifications particulières qui ne satisfont pas aux exigences peuvent ne pas être considérées comme conformes aux spécifications de la CEI et ne doivent pas être décrites comme telles. Dans la préparation des spécifications particulières, le contenu de 1.4 de la spécification intermédiaire doit être pris en compte.

General Information

• Status: Published
• Publication Date: 28-Oct-1999
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.100.10 - Magnetic components
• ICS: 31.020 - Electronic components in general
• Technical Committee: TC 40 - Capacitors and resistors for electronic equipment

Relations

• Revised: IEC 60938-2-1:2023 - Fixed inductors for electromagnetic interference suppression - Part 2-1: Blank detail specification - Inductors for which safety tests are required
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60938-2-1
QC 280101
First edition
1999-10
Fixed inductors for electromagnetic
interference suppression –
Part 2-1:
Blank detail specification –
Inductors for which safety tests are required –
Assessment level D
Inductances fixes d'antiparasitage –
Partie 2-1:
Spécification particulière cadre –
Inductances nécessitant des tests de sécurité –
Niveau d'évaluation D
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are

available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base

publication incorporating amendments 1 and 2.

Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*
•
Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
60938-2-1
QC 280101
First edition
1999-10
Fixed inductors for electromagnetic
interference suppression –
Part 2-1:
Blank detail specification –
Inductors for which safety tests are required –
Assessment level D
Inductances fixes d'antiparasitage –
Partie 2-1:
Spécification particulière cadre –
Inductances nécessitant des tests de sécurité –
Niveau d'évaluation D
 IEC 1999  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
L
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60938-2-1 © IEC:1999(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FIXED INDUCTORS FOR ELECTROMAGNETIC

INTERFERENCE SUPPRESSION –
Part 2-1: Blank detail specification –

Inductors for which safety tests are required – Assessment level D

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60938-2-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
FDIS Report on voting
40/1112/FDIS 40/1138/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 3.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).

60938-2-1 © IEC:1999(E) – 3 –
The committee has decided that this publication remains valid until 2005.

At this date, in accordance with the committee’s decision, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or

• amended.
A bilingual version of this publication may be issued at a later date.

– 4 – 60938-2-1 © IEC:1999(E)
FIXED INDUCTORS FOR ELECTROMAGNETIC

INTERFERENCE SUPPRESSION –
Part 2-1: Blank detail specification –

Inductors for which safety tests are required – Assessment level D

INTRODUCTION
Blank detail specification
A blank detail specification is a supplementary document to the sectional specification and
contains requirements for style, layout and minimum content of detail specifications. Detail
specifications not complying with these requirements may not be considered as being in
accordance with IEC specifications nor shall they so be described.
In the preparation of detail specifications the content of 1.4 of the sectional specification shall
be taken into account.
The numbers between square brackets on the first page of the detail specification correspond
to the following information which shall be inserted in the position indicated.
Identification of the detail specification
[1] The "International Electrotechnical Commission" or the National Standards Organization
under whose authority the detail specification is drafted.
[2] The IEC or National Standards number of the detail specification, date of issue and any
further information required by the national system.
[3] The number and issue number of the IEC or national generic specification.
[4] The IEC number of the blank detail specification.
Identification of the inductor
[5] A short description of the type of inductor.
[6] Information on typical construction (when applicable).
[7] Outline drawing with main dimensions which are of importance for interchangeability
and/or reference to the national or international documents for outlines. Alternatively, this

drawing may be given in an annex to the detail specification.
[8] Application or group of applications covered and/or assessment level.
[9] Reference data on the most important properties, to allow comparison between the
various inductor types.
60938-2-1 © IEC:1999(E) – 5 –
[1] IEC 60938-2-1XX [2]
QC XXXXXXXXXXXX
ELECTRONIC COMPONENTS OF ASSESSED IEC 60938-2-1 [4]

QUALITY IN ACCORDANCE WITH: QC XXXXXX

[3] FIXED INDUCTORS FOR
ELECTROMAGNETIC INTERFERENCE
SUPPRESSION FOR WHICH SAFETY [5]
Outline drawing: (see table 1) TESTS ARE REQUIRED
(. angle projection)
[7] [6]
(Other shapes are permitted within the dimensions
given)
Assessment level: D [8]
NOTES [1] to [9] see page 3.
[9]
Information on the availability of components qualified
to this detail specification is given in the Register of
Approvals.
1 General data
1.1 Recommended method(s) of mounting (to be inserted)
(See 1.4.3 of IEC 60938-2.)
1.2 Dimensions
Table 1 – Dimensions related to case size
Case size Dimensions
reference or type
mm
LW H
NOTE 1 – When there is no case size reference, the dimensions should be given per type designation.
NOTE 2 – The dimensions should be given as maximum dimensions or as nominal dimensions with a tolerance.

– 6 – 60938-2-1 © IEC:1999(E)
1.3 Ratings and characteristics

Inductance range (see table 2)

Tolerance on rated inductance
Rated current (I) range (see table 2)

DC res
...

IEC 60938-2-1 ®
Edition 1.0 1999-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed inductors for electromagnetic interference suppression –
Part 2-1: Blank detail specification – Inductors for which safety tests are
required – Assessment level D
Inductances fixes d’antiparasitage –
Partie 2-1: Spécification particulière cadre – Inductances nécessitant des essais
de sécurité – Niveau d'évaluation D

Copyright © 1999 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60938-2-1 ®
Edition 1.0 1999-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed inductors for electromagnetic interference suppression –

Part 2-1: Blank detail specification – Inductors for which safety tests are

required – Assessment level D
Inductances fixes d’antiparasitage –

Partie 2-1: Spécification particulière cadre – Inductances nécessitant des essais

de sécurité – Niveau d'évaluation D

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX L
ICS 29.100.10; 31.020 ISBN 978-2-8322-1335-3

– 2 – 60938-2-1 © IEC:1999
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED INDUCTORS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 2-1: Blank detail specification –
Inductors for which safety tests are required –
Assessment level D
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60938-2-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This bilingual version (2014-01) corresponds to the monolingual English version, published in
1999-10.
The text of this standard is based on the following documents:
FDIS Report on voting
40/1112/FDIS 40/1138/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.
The French version of this standard has not been voted upon.

60938-2-1 © IEC:1999 – 3 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
The committee has decided that this publication remains valid until 2005.
At this date, in accordance with the committee’s decision, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 4 – 60938-2-1 © IEC:1999
FIXED INDUCTORS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 2-1: Blank detail specification –
Inductors for which safety tests are required –
Assessment level D
INTRODUCTION
Blank detail specification
A blank detail specification is a supplementary document to the sectional specification and
contains requirements for style, layout and minimum content of detail specifications. Detail
specifications not complying with these requirements may not be considered as being in
accordance with IEC specifications nor shall they so be described.
In the preparation of detail specifications the content of 1.4 of the sectional specification shall
be taken into account.
The numbers between square brackets on the first page of the detail specification correspond
to the following information which shall be inserted in the position indicated.
Identification of the detail specification
[1] The "International Electrotechnical Commission" or the National Standards Organization
under whose authority the detail specification is drafted.
[2] The IEC or National Standards number of the detail specification, date of issue and any
further information required by the national system.
[3] The number and issue number of the IEC or national generic specification.
[4] The IEC number of the blank detail specification.
Identification of the inductor
[5] A short description of the type of inductor.
[6] Information on typical construction (when applicable).
[7] Outline drawing with main dimensions which are of importance for interchangeability
and/or reference to the national or international documents for outlines. Alternatively, this
drawing may be given in an annex to the detail specification.
[8] Application or group of applications covered and/or assessment level.
[9] Reference data on the most important properties, to allow comparison between the
various inductor types.
60938-2-1 © IEC:1999 – 5 –
[1] IEC 60938-2-1XX [2]
QC XXXXXXXXXXXX
ELECTRONIC COMPONENTS OF ASSESSED IEC 60938-2-1 [4]
QUALITY IN ACCORDANCE WITH: QC XXXXXX

[3] FIXED INDUCTORS FOR
ELECTROMAGNETIC INTERFERENCE
SUPPRESSION FOR WHICH SAFETY [5]
Outline drawing: (see table 1) TESTS ARE REQUIRED
(. angle projection)
[7] [6]
(Other shapes are permitted within the dimensions
given)
Assessment level: D [8]
NOTES [1] to [9] see page 3.
[9]
Information on the availability of components qualified
to this detail specification is given in the Register of
Approvals.
1 General data
1.1 Recommended method(s) of mounting (to be inserted)
(See 1.4.3 of IEC 60938-2.)
1.2 Dimensions
Table 1 – Dimensions related to case size
Case size Dimensions
reference or type
mm
L W H
NOTE 1 When there is no case size reference, the dimensions should be given per type designation.
NOTE 2 The dimensions should be given as maximum dimensions or as nominal dimensions with a tolerance.

– 6 – 60938-2-1 © IEC:1999
1.3 Ratings and characteristics
Inductance range (see table 2)
Tolerance on rated inductance
Rated current (I) range (see table 2)
DC resistance (R) (see table 2)
Rated voltage
Rated temperature
Climatic category
Category of passive flammability
Table 2 – Type designation related to values of inductance, rated current
and d.c. resistance
Type designation L I R
R R max
related to values of
per line per line
inductance, rated
current and d.c.
mH
A Ω
resistance
1.4 Related documents
Generic specification: IEC 60938-1:(1999), Fixed inductors for electromagnetic interference
suppression – Part 1: Generic specification
Sectional specification: IEC 60938-2:(1999), Fixed inductors for electromagnetic interference
suppression – Part 2: Sectional specification
1.5 Marking
The marking of the inductor and the package shall be in accordance with the requirements
of 1.6 of IEC 60938-2.
The details of the marking of the component and packaging shall be given in full in the detail
specification.
1.6 Ordering information
Orders for inductors covered by this specification shall contain, in clear or in coded form, the
following minimum information:
a) type designation;
b) rated inductance;
c) tolerance on rated inductance;
d) rated voltage;
...