SIST EN 60940:2015

SLOVENSKI STANDARD
SIST EN 60940:2015
01-september-2015
Navodilo za uporabo kondenzatorjev, uporov, tuljav in celotnih filtrskih enot za
dušenje elektromagnetnih motenj
Guidance information on the application of capacitors, resistors, inductors and complete
filter units for electromagnetic interference suppression
Grundlagen für die Anwendung von Kondensatoren, Widerständen, Drosseln und
vollständigen Filtereinheiten zur Unterdrückung elektromagnetischer Störungen
Guide d'emploi des condensateurs, résistances, inductances et filtres complets
d'antiparasitage
Ta slovenski standard je istoveten z: EN 60940:2015
ICS:
31.020 Elektronske komponente na Electronic components in
splošno general
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 60940:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60940:2015

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SIST EN 60940:2015


EUROPEAN STANDARD EN 60940

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2015
ICS 33.100

English Version
Guidance information on the application of capacitors, resistors,
inductors and complete filter units for electromagnetic
interference suppression
(IEC 60940:2015)
Guide d'emploi des condensateurs, résistances, Grundlagen für die Anwendung von Kondensatoren,
inductances et filtres complets d'antiparasitage Widerständen, Drosseln und vollständigen Filtereinheiten
(IEC 60940:2015) zur Unterdrückung elektromagnetischer Störungen
(IEC 60940:2015)
This European Standard was approved by CENELEC on 2015-04-14. 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.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60940:2015 E

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SIST EN 60940:2015
EN 60940:2015 - 2 -
Foreword
The text of document 40/2337/FDIS, future edition 2 of IEC 60940, prepared by IEC/TC 40
"Capacitors and resistors for electronic equipment" was submitted to the IEC-CENELEC parallel vote
and approved by CENELEC as EN 60940:2015.

The following dates are fixed:
(dop) 2016-01-14
• 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) 2018-04-14
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 60940:2015 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 60068-2-78 NOTE Harmonized as EN 60068-2-78.
IEC 60204-1 NOTE Harmonized as EN 60204-1.
IEC 60384-14-1 NOTE Harmonized as EN 60384-14-1.
IEC 60384-14-2 NOTE Harmonized as EN 60384-14-2.
IEC 60384-14-3 NOTE Harmonized as EN 60384-14-3.
IEC 60664-1 NOTE Harmonized as EN 60664-1.
IEC 60938-1 NOTE Harmonized as EN 60938-1.
IEC 60938-2 NOTE Harmonized as EN 60938-2.
IEC 60938-2-1 NOTE Harmonized as EN 60938-2-1.
IEC 60938-2-2 NOTE Harmonized as EN 60938-2-2.
IEC 60939-1 NOTE Harmonized as EN 60939-1.
IEC 60939-2 NOTE Harmonized as EN 60939-2.
IEC 60939-2-1 NOTE Harmonized as EN 60939-2-1.
IEC 60939-2-2 NOTE Harmonized as EN 60939-2-2.
IEC 60950-1 NOTE Harmonized as EN 60950-1.
IEC 62368-1 NOTE Harmonized as EN 62368-1.
CISPR 11 NOTE Harmonized as EN 55011.
CISPR 17 NOTE Harmonized as EN 55017.

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SIST EN 60940:2015
- 3 - EN 60940:2015
Annex ZA
(normative)

Normative references to international 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 1 When 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 60335-1 -  Household and similar electrical EN 60335-1 -
appliances - Safety -
Part 1: General requirements
IEC 60384-14 -  Fixed capacitors for use in electronic EN 60384-14 -
equipment -
Part 14: Sectional specification - Fixed
capacitors for electromagnetic interference
suppression and connection to the supply
mains

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SIST EN 60940:2015

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SIST EN 60940:2015



IEC 60940

®


Edition 2.0 2015-03




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Guidance information on the application of capacitors, resistors, inductors and

complete filter units for electromagnetic interference suppression




Guide d'emploi des condensateurs, résistances, inductances et filtres complets

d'antiparasitage
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.100 ISBN 978-2-8322-2290-4



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

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

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60940:2015
– 2 – IEC 60940:2015  IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Electromagnetic and Radio frequency interference suppression (EMI/RFI) . 5
3.1 General . 5
3.2 Limits of interference . 6
4 Classification of suppression components . 6
4.1 Suppression components . 6
4.2 Capacitors . 8
4.3 Inductors . 8
4.4 Filters . 8
5 Choice of ratings for specific applications . 8
5.1 Voltage . 8
5.2 Current . 9
5.3 Environmental classification (climatic category) . 9
5.4 Insertion loss . 9
6 Connection of suppression components . 9
7 Safety aspects . 10
7.1 Class X and Y capacitors . 10
7.2 Leakage current . 11
7.3 Mounting of radio interference suppression components in equipment and
appliances . 11
7.4 Electrical shock hazard protection testing . 11
Bibliography . 12

Figure 1 – Example use of suppression components in EMI filter . 7

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SIST EN 60940:2015
IEC 60940:2015  IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

GUIDANCE INFORMATION ON THE APPLICATION OF CAPACITORS,
RESISTORS, INDUCTORS AND COMPLETE FILTER UNITS FOR
ELECTROMAGNETIC INTERFERENCE SUPPRESSION

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 60940 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This second edition cancels and replaces the first edition published in 1988. This second
edition is a result of maintenance activities related to the previous edition. All changes that
have been agreed upon can be categorized as minor revisions.
The text of this standard is based on the following documents:
FDIS Report on voting
40/2337/FDIS 40/2362/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.

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SIST EN 60940:2015
– 4 – IEC 60940:2015  IEC 2015
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.

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SIST EN 60940:2015
IEC 60940:2015  IEC 2015 – 5 –
GUIDANCE INFORMATION ON THE APPLICATION OF CAPACITORS,
RESISTORS, INDUCTORS AND COMPLETE FILTER UNITS FOR
ELECTROMAGNETIC INTERFERENCE SUPPRESSION



1 Scope
This international standard provides guidance applicable to information on application of
capacitors, resistors, inductors, and complete filter units for electromagnetic interference
suppression.
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 60335-1, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60384-14, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
3 Electromagnetic and Radio frequency interference suppression (EMI/RFI)
3.1 General
Electromagnetic interference, EMI, is any electromagnetic emission or any electric or
electronic disturbance which causes an undesirable response, malfunctioning or degradation
in the performance of electrical equipment.
Radio frequency interference, RFI, is any electrical energy with content within the frequency
range dedicated to radio frequency transmission.
Conducted RFI is most often found in the low frequency range from 150 kHz to 30 MHz.
Radiated RFI is most often found in the frequency range from 30 MHz to 10 GHz.
EMI or RFI propagate through conduction over signal and power lines and through radiation in
free space.
Electrical machines and apparatus may generate electromagnetic interferences (EMI) which
are fed back into power supply mains. These electromagnetic interferences may be picked up
by apparatus connected to or placed close to the same power system up to a certain distance
from the machine or apparatus.
The radio-frequency voltages may be generated both between conductors (phases) of the
power system (symmetrical interference) and also between conductors (phases) and earth
(asymmetrical interference). These voltages can cause electromagnetic radiation from the
power lines
...