IEC 61204-3:2016

Low-voltage switch mode power supplies - Part 3: Electromagnetic compatibility (EMC)

IEC 61204-3:2016 specifies the electromagnetic compatibility (EMC) requirements for switch mode power supply (SMPS) units supplied by source voltages up to 1 000 V AC or 1 500 V DC providing AC and/or DC output(s), except inverter output(s) establishing AC mains. This edition includes the following significant technical changes with respect to the previous edition:
a) the title has been changed by deleting the wording "DC output-" from the title and adding "switch mode" in the title;
b) changes in the scope: 1.1.1 Equipment covered by this document;
c) update of the normative references to the latest editions or dated references;
d) change of wording or/and notes regarding the requirements of CENELEC Guide 24 and IEC Guide 107;
e) revision of the emission limits to align with the latest editions of the applicable normative references;
f) revision of the immunity requirements to align with the latest editions of the applicable normative references;
g) correction of typographical errors.

Alimentations à découpage basse tension - Partie 3: Compatibilité électromagnétique (CEM)

L'IEC 61204-3:2016 spécifie les exigences de compatibilité électromagnétique (CEM) pour les alimentations à découpage (switch mode power supply - SMPS) alimentées par des sources ne dépassant pas 1 000 V en courant alternatif et 1 500 V en courant continu fournissant un courant alternatif et/ou continu, à l'exception de la ou des sorties de l'onduleur alimentant le réseau en courant alternatif. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) modification du titre avec la suppression des termes "sortie continue" et l'ajout des termes "à découpage";
b) modifications dans le domaine d'application: 1.1.1 Matériel couvert par le présent document;
c) mise à jour des références normatives pour mentionner les dernières éditions ou les références datées;
d) modifications de la formulation et/ou des notes relatives aux exigences du Guide 24 du CENELEC et du Guide 107 de l'IEC;
e) révisions des limites relatives aux émissions pour les aligner avec celles des dernières versions des références normatives applicables;
f) révisions des exigences relatives à l'immunité pour les aligner avec celles des dernières versions des références normatives applicables;
g) correction d'ordre typographiques.

General Information

• Status: Published
• Publication Date: 27-Oct-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.140.40 - Luminaires
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• ICS: 33.100 - Electromagnetic compatibility (EMC)
• Technical Committee: SC 22E - Stabilized power supplies
• Drafting Committee: MT 5 - TC 22/SC 22E/MT 5
• Current Stage: PPUB - Publication issued
• Start Date: 30-Nov-2016
• Completion Date: 28-Oct-2016

Relations

• Revises: IEC 61204-3:2011 - Low voltage power supplies, d.c. output - Part 3: Electromagnetic compatibility (EMC)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61204-3 ®
Edition 3.0 2016-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switch mode power supplies, d.c. output –
Part 3: Electromagnetic compatibility (EMC)

All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 61204-3 ®
Edition 3.0 2016-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Low-voltage switch mode power supplies, d.c. output –

Part 3: Electromagnetic compatibility (EMC)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200; 33.100 ISBN 978-2-8322-3734-2

– 2 – IEC 61204-3:2016 RLV © IEC 2016
CONTENTS
FOREWORD . 4
1 Scope and object . 6
1.1 Scope . 6
1.1.1 Equipment covered by this document . 6
1.1.2 Additional requirements . 6
1.1.3 Exclusions . 6
1.1.4 Types of power supply . 7
1.1.5 Configurations and combinations of power supplies . 7
1.2 Object . 8
2 Normative references . 8
3 Terms and definitions . 10
4 Applicability of tests to different PSU technologies . 14
5 General requirements and test conditions . 14
5.1 General requirements . 14
5.2 Test conditions . 14
6 Emission requirements . 15
6.1 General . 15
6.2 Low frequency phenomena (f ≤ 9 kHz; AC input only) . 15
6.2.1 Commutation notches . 15
6.2.2 Current harmonics and interharmonics . 15
6.2.3 Voltage fluctuations and flicker . 16
6.3 High frequency conducted emission . 16
6.3.1 General . 16
6.3.2 High frequency conducted emission for input power ports . 16
6.3.3 High frequency conducted emission for DC output power ports . 16
6.4 High frequency radiated emission . 16
6.4.1 General . 16
6.4.2 Radiated disturbance measurements . 17
6.4.3 Measurement of disturbance power . 17
6.4.4 Restrictions for the application of interference power measurement . 18
7 Immunity requirements . 19
7.1 Performance criteria . 19
7.2 Basic immunity requirements, high frequency disturbances . 19
7.2.1 General . 19
7.2.2 Immunity level for residential, commercial and light industrial
environment . 20
7.2.3 Immunity level for industrial environment . 22
8 Power supply families aspects . 25
9 Statistical aspects . 26
10 Safety aspects . 26
11 Test report . 26
Annex A (normative) Guidelines on the classification of PSUs . 27
A.1 General . 27
A.2 Stand alone power supplies . 27
A.3 Component power supplies . 27

Annex B (informative) Commutation notches . 29
Annex C (informative) Calculation and simulation of the input current harmonics . 30
Annex D (informative) Special considerations for DC/DC converters . 31
D.1 General . 31
D.2 Emission . 31
D.3 Immunity . 31
Annex E (informative) Critical frequency for high frequency power measurement . 34
Annex F (normative) Guidelines on power supply families . 35
F.1 General . 35
F.2 Emission . 35
F.3 Immunity performance . 35
Annex G (informative) Summary of classification of environments and limits . 37
G.1 Residential, commercial and light industrial environment . 37
G.2 Industrial environment . 37
G.3 Special applications . 37
G.4 Special considerations for DC/DC converters . 38
Annex H (normative) Emission limits . 39
Bibliography . 41

Figure 1 – Examples of ports . 11
Figure 2 – Test set-up for the measurement of disturbance power . 18

Table 1 – Criteria to prove the performance of a PSU against EM disturbances . 19
Table 2 – Immunity – Enclosure port – Residential, commercial and light industrial
environment . 20
Table 3 – Immunity – Ports for signal lines and control lines
Residential, commercial and light industrial environment . 21
Table 4 – Immunity – DC input and output power ports
Residential, commercial and light industrial environment . 21
Table 5 – Immunity – AC input power ports – Residential, commercial and light
industrial environment . 22
Table 6 – Immunity – Enclosure port – Industrial environment . 23
Table 7 – Immunity – Ports for signal lines and control lines – Industrial environment . 23
Table 8 – Immunity – DC input and output power ports – Industrial environment . 24
Table 9 – Immunity – AC input power ports – Industrial environment. 25
Table A.1 – Classification of power supplies and the relevant EMC standards . 28
Table D.1 – Immunity – DC input power ports – Input category a . 32
Table D.2 – Immunity – DC input power ports – Input category b . 32
Table D.3 – Immunity – Enclosure port – Input categories a and b . 33
Table H.1 – Limits of mains terminal disturbance voltage (AC input port) . 39
Table H.2 – Limits of mains terminal disturbance voltage (DC input and DC output
power port) . 39
Table H.3 – Limits for electromagnetic radiation/interference power disturbance (all
field strength limits refer to quasi-peak measurements) . 40
Table H.4 – Disturbance power limits for the frequency range 30 MHz to 300 MHz . 40

– 4 – IEC 61204-3:2016 RLV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCH MODE POWER SUPPLIES, d.c. OUTPUT –

Part 3: Electromagnetic compatibility (EMC)

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 I
...

IEC 61204-3 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switch mode power supplies –
Part 3: Electromagnetic compatibility (EMC)

Alimentations à découpage basse tension –
Partie 3: Compatibilité électromagnétique (CEM)

All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
65 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61204-3 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switch mode power supplies –

Part 3: Electromagnetic compatibility (EMC)

Alimentations à découpage basse tension –

Partie 3: Compatibilité électromagnétique (CEM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200; 33.100 ISBN 978-2-8322-3689-5

– 2 – IEC 61204-3:2016 © IEC 2016
CONTENTS
FOREWORD . 4
1 Scope and object . 6
1.1 Scope . 6
1.1.1 Equipment covered by this document . 6
1.1.2 Additional requirements . 6
1.1.3 Exclusions . 6
1.1.4 Types of power supply . 7
1.1.5 Configurations and combinations of power supplies . 7
1.2 Object . 8
2 Normative references . 8
3 Terms and definitions . 10
4 Applicability of tests to different PSU technologies . 13
5 General requirements and test conditions . 14
5.1 General requirements . 14
5.2 Test conditions . 14
6 Emission requirements . 14
6.1 General . 14
6.2 Low frequency phenomena (f ≤ 9 kHz; AC input only) . 14
6.2.1 Commutation notches . 14
6.2.2 Current harmonics and interharmonics . 14
6.2.3 Voltage fluctuations and flicker . 15
6.3 High frequency conducted emission . 15
6.3.1 General . 15
6.3.2 High frequency conducted emission for input power ports . 15
6.3.3 High frequency conducted emission for DC output power ports . 16
6.4 High frequency radiated emission . 16
6.4.1 General . 16
6.4.2 Radiated disturbance measurements . 16
6.4.3 Measurement of disturbance power . 16
6.4.4 Restrictions for the application of interference power measurement . 17
7 Immunity requirements . 18
7.1 Performance criteria . 18
7.2 Basic immunity requirements, high frequency disturbances . 18
7.2.1 General . 18
7.2.2 Immunity level for residential, commercial and light industrial
environment . 18
7.2.3 Immunity level for industrial environment . 21
8 Power supply families aspects . 24
9 Statistical aspects . 25
10 Safety aspects . 25
11 Test report . 25
Annex A (normative) Guidelines on the classification of PSUs . 26
A.1 General . 26
A.2 Stand alone power supplies . 26
A.3 Component power supplies . 26

Annex B (informative) Commutation notches . 28
Annex C (informative) Calculation and simulation of the input current harmonics . 29
Annex D (informative) Special considerations for DC/DC converters . 30
D.1 General . 30
D.2 Emission . 30
D.3 Immunity . 30
Annex E (informative) Critical frequency for high frequency power measurement . 33
Annex F (normative) Guidelines on power supply families . 34
F.1 General . 34
F.2 Emission . 34
F.3 Immunity performance . 34
Annex G (informative) Summary of classification of environments and limits . 36
G.1 Residential, commercial and light industrial environment . 36
G.2 Industrial environment . 36
G.3 Special applications . 36
G.4 Special considerations for DC/DC converters . 37
Annex H (normative) Emission limits . 38
Bibliography . 40

Figure 1 – Examples of ports . 11
Figure 2 – Test set-up for the measurement of disturbance power . 17

Table 1 – Criteria to prove the performance of a PSU against EM disturbances . 18
Table 2 – Immunity – Enclosure port – Residential, commercial and light industrial
environment . 19
Table 3 – Immunity – Ports for signal lines and control lines Residential, commercial
and light industrial environment .
...