EN 62317-4:2005

Ferrite cores - Dimensions - Part 4: RM-cores and associated parts

Specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of RM-cores and low-profile RM-cores made of ferrite, and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base outlines of the cores. Also specifies the test conditions and clamping forces to be used for inductance measurement.

Ferritkerne - Maße - Teil 4: RM-Ferritkerne und deren Zubehörteile

Noyaux ferrites - Dimensions - Partie 4: Noyaux RM et parties associées

La CEI 62317-4:2005 spécifie les dimensions qui présentent une importance pour l'interchangeabilité mécanique d'une gamme préférentielle de noyaux RM et de noyaux RM faible hauteur en ferrite, et l'emplacement de leurs broches de raccordement sur une grille à pas de 2,54 mm en rapport avec le périmètre d'embase des noyaux. Elle spécifie également les conditions d'essai et les forces d'assemblage à utiliser pour mesurer l'inductance. La présente Norme internationale annule et remplace la deuxième édition de la CEI 60431 publiée en 1983, ainsi que son amendement 1 (1995) et son amendement 2 (1996). La présente Norme internationale constitue une révision technique de la CEI 60431.

Feritna jedra – Mere – 4. del: RM-jedra in pripadajoči deli (IEC 62317-4:2005)

General Information

• Status: Withdrawn
• Publication Date: 20-Dec-2005
• Withdrawal Date: 30-Sep-2008
• ICS: 29.100.10 - Magnetic components
• Technical Committee: CLC/SR 51 - Magnetic components and ferrite materials
• Drafting Committee: IEC/TC 51 - IEC_TC_51
• Parallel Committee: IEC/TC 51 - IEC_TC_51
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 12-Apr-2022
• Completion Date: 12-Apr-2022
• Ref Project: SIST EN 62317-4:2006 - Ferrite cores - Dimensions -- Part 4: RM-cores and associated parts

Relations

• Replaces: EN 60431:1997/A2:1998 - Dimensions of square cores (RM-cores) made of magnetic oxides and associated parts
• Effective Date: 28-Jan-2023
• Replaces: EN 60431:1997 - Dimensions of square cores (RM-cores) made of magnetic oxides and associated parts
• Effective Date: 28-Jan-2023
• Replaced By: EN IEC 63093-4:2019 - Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2006
1DGRPHãþD
SIST EN 60431:2002
SIST EN 60431:2002/A2:2002
)HULWQDMHGUD±0HUH±GHO50MHGUDLQSULSDGDMRþLGHOL,(&
Ferrite cores - Dimensions -- Part 4: RM-cores and associated parts
Ferritkerne - Maße -- Teil 4: RM-Ferritkerne und deren Zubehörteile
Noyaux ferrites - Dimensions -- Partie 4: Noyaux RM et parties associées
Ta slovenski standard je istoveten z: EN 62317-4:2005
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62317-4
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2005

ICS 29.100.10 Supersedes EN 60431:1997 + A2:1998

English version
Ferrite cores -
Dimensions
Part 4: RM-cores and associated parts
(IEC 62317-4:2005)
Noyaux ferrites -  Ferritkerne -
Dimensions Maße
Partie 4: Noyaux RM et parties associées Teil 4: RM-Ferritkerne und deren
(CEI 62317-4:2005) Zubehörteile
(IEC 62317-4:2005)
This European Standard was approved by CENELEC on 2005-10-01. 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 Central Secretariat or to any CENELEC member.

This European Standard exists in two official versions (English, 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
Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62317-4:2005 E
Foreword
The text of document 51/833/FDIS, edition 1 of IEC 62317-4, prepared by IEC TC 51, Magnetic
components and ferrite materials, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 62317-4 on 2005-10-01.
This European Standard supersedes EN 60431:1997 + A2:1998.
The main changes with respect to EN 60431 are listed below:
– low-profile RM-cores at present defined in EN 61860 are added to this standard.
EN 61860 will eventually be replaced by EN 62317-9 which is under consideration. EN 62317-9 will
not include the low-profile RM-cores.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62317-4:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62317-4:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60097 1991 Grid systems for printed circuits EN 60097 1993

IEC 60205 2001 Calculation of the effective parameters of EN 60205 2001
magnetic piece parts
INTERNATIONAL IEC
STANDARD 62317-4
First edition
2005-09
Ferrite cores – Dimensions –
Part 4:
RM-cores and associated parts
 IEC 2005  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, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale S
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62317-4  IEC:2005(E)
CONTENTS
FOREWORD.3

1 Scope.5
2 Normative references.5
3 Primary standards.5
3.1 Pin locations and base outlines.5
3.2 Dimensions of RM-cores.5
3.3 Shape of coil former and pin numbering .6
3.4 Effective parameter values .6
3.5 Spring recess .6
3.6 Stud recess .6
4 Derived standards.10
5 Main dimensions for coil formers.13
5.1 RM-cores for primary standard.13
5.2 RM-cores intended particularly for power applications .15

Annex A (informative) RM-core design .18
Annex B (normative) Guidance for measuring clamping forces relevant to RM-core tests .20

Bibliography .22

62317-4  IEC:2005(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FERRITE CORES – DIMENSIONS –
Part 4: RM-cores and associated parts

FOREWORD
1) The International Electrotechnical Commission (IEC) 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, 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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment
declared to be in conformity with an IEC Publication.
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 62317-4 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
This international standard cancels and replaces the second edition of IEC 60431 published in
1983, its amendment 1 (1995), and its amendment 2 (1996). This international standard
constitutes a technical revision of IEC 60431.
The main changes with respect to the previous edition of IEC 60431 are listed below:
－ low-profile RM-cores at present defined in IEC 61860 are added to this standard.
IEC 61860 will eventually be replaced by IEC 62317-9 which is under consideration. IEC 62317-9
will not include the low-profile RM-cores.

– 4 – 62317-4  IEC:2005(E)
The text of this standard is based on the following documents:
FDIS Report on voting
51/833/FDIS 51/839/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.
IEC 62317 consists of the following parts, under the general title Ferrite cores – Dimensions:
Part 1: General (under consideration)
Part 2: Pot cores (under consideration, currently available as IEC 60133)
Part 3: Half pot cores (under consideration, currently available as IEC 62323)
Part 4: RM-cores and associated parts
Part 5: EP-cores (under consideration, currently available as IEC 61596)
Part 6: ETD-cores (under consideration, currently available as IEC 61185)
Part 7: EER-cores
Part 8: E-cores
Part 9: Planar cores
Part 10: PM-cores (under consideration, currently available as IEC 61247)
Part 11: EC-cores (under consideration, currently available as IEC 60647)
Part 12: Uncoated ring cores (under consideration, currently available as IEC 61604)

The committee has decided that the contents of this publication will remain unchanged until the
maintenance result 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.
A bilingual version of this publication may be issued at a later date.

62317-4  IEC:2005(E) – 5 –
FERRITE CORES – DIMENSIONS –
Part 4: RM-cores and associated parts

1 Scope
This part of IEC 62317 specifies the dimensions that are of importance for mechanical
interchangeability for a preferred range of RM-cores and low-profile RM-cores made of ferrite,
and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base
outlines of the cores. It also specifies the test conditions and clamping forces to be used for
inductance measurement.
The general considerations that the design of this range of cores is based upon are given in
Annex A.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
IEC 60097:1991, Grid system for printed circuits
IEC 60205:2001, Calculation of the effective parameters of magnetic piece parts
3 Primary standards
Compliance with the following requirements ensures mechanical interchangeability of complete
assemblies and wound coil formers.
3.1 Pin locations and base outlines
These shall be as shown in Figure 6 and Figure 8 (for power applications), in which the base is
viewed from the pin side, i.e. from the underside of the printed wir
...