IEC 60938-2-2:1999

IEC 60938-2-2 ®
Edition 1.0 1999-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed inductors for electromagnetic interference suppression –
Part 2-2: Blank detail specification – Inductors for which safety tests are
required (only)
Inductances fixes d’antiparasitage –
Partie 2-2: Spécification particulière cadre – Inductances nécessitant des essais
de sécurité (uniquement)
Copyright © 1999 IEC, Geneva, Switzerland

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IEC 60938-2-2 ®
Edition 1.0 1999-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed inductors for electromagnetic interference suppression –

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

required (only)
Inductances fixes d’antiparasitage –

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

de sécurité (uniquement)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX J
ICS 29.100.10; 31.020 ISBN 978-2-83220-772-7

– 2 – 60938-2-2 © IEC:1999
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED INDUCTORS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 2-2: Blank detail specification –
Inductors for which safety tests are required (only)

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 60938-2-2 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This bilingual version (2013-05) 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
40/1113/FDIS 40/1139/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annex A forms an integral part of this standard.

60938-2-2 © IEC:1999 – 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 – 60938-2-2 © IEC:1999
FIXED INDUCTORS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 2-2: Blank detail specification –
Inductors for which safety tests are required (only)

INTRODUCTION
Blank detail specification
This blank detail specification forms the basis for a uniform procedure for a common mark. It
implements the approval schedule for safety tests only in IEC 60938-2, requires a declaration
of design for parameters relevant to safety tests and prescribes conformance tests to be
conducted on every lot prior to its release and re-qualification tests depending on changes of
the design.
In comparison with IEC 60938-2-1 which provides safety tests and performance tests, this
specification is restricted to safety tests only.
The use of IEC 60938-2-1 may be more appropriate for components manufactured in mass
production, whereas this specification may be necessary in those cases where approval and re-
qualification tests contribute considerably to the costs of the product.
A blank detail specification is a supplementary document to the sectional specification and
contains requirements for style and layout and minimum content of detail specifications. 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 and of the inductor
The first page of the detail specification should have the layout recommended on the next page
of this blank detail specification.
[0] Manufacturer's name.
[0A] Manufacturer's style designation.
[1] The "International Electrotechnical Commission" or the National Standards Organisation
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 inductor or range of inductors.
[6] Information on typical construction (when applicable).

60938-2-2 © IEC:1999 – 5 –
[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, but should always contain
an illustration of the general outer appearance of the inductor.
[8] Reference data on the most important properties, to allow comparison between the
various inductor types intended for the same, or for similar applications.

[1] IEC 60938-2-1XX [2]
QC XXXXXXXXXXXX
ELECTRONIC COMPONENTS OF ASSESSED IEC 60938-2-2 [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)
Safety tests only [8]
NOTES [1] to [9] see pages 3 and 4.

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.)
– 6 – 60938-2-2 © IEC:1999
1.2 Dimensions
Table 1 – Dimensions related to case size

Dimensions
Case size
reference or
mm
type
L W H L L L
1 2 3 4
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.
1.3 Ratings and characteristics
) (see table 2)
Rated inductance (L
R
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 (if applicable)

Table 2 – Values of inductance, rated current and
d.c. resistance related to type designation
Ordering code, type L I R
R R max
designation
per line per line
mH A Ω
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

60938-2-2 © IEC:1999 – 7 –
1.5 Marking
The marking of the inductor shall be in accordance with the requirements of 1.6 of
IEC 60938-2.
The details of the marking of the component and package 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;
e) rated current;
f) number and issue reference of the detail specification and style reference.
1.7 Additional information (not for inspection purposes)
1.8 Additional or increased seve
...