SIST EN 62317-4:2006

SLOVENSKI STANDARD
SIST EN 62317-4:2006
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
SIST EN 62317-4:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62317-4:2006

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SIST EN 62317-4:2006
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

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SIST EN 62317-4:2006
EN 62317-4:2005 - 2 -
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.
__________

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SIST EN 62317-4:2006
- 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

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SIST EN 62317-4:2006

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SIST EN 62317-4:2006


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: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale S
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

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SIST EN 62317-4:2006
– 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

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SIST EN 62317-4:2006
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.

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SIST EN 62317-4:2006
– 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.

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SIST EN 62317-4:2006
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 wiring boards.
The pins shall fit into holes according to IEC 60097, the nominal hole diameter being:
– 1 mm when the shortest distance between pins is 2,54 mm;
– 1,3 mm when the shortest distance between pins is 2,54 2 mm or more.
3.2 Dimensions of RM-cores
The dimensions of RM-cores shall be as given in Table 1 and the low-profile RM-cores shall be as
given in Table 2.

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SIST EN 62317-4:2006
– 6 – 62317-4  IEC:2005(E)
3.3 Shape of coil former and pin numbering
When the coil former is viewed from the pin side, the pins shall be numbered in a clockwise
direction. Pin 1 shall be a corner pin, or the pin immediately to the right of a corner, and closest to
the base outline.
For asymmetrical arrangements, pin 1 shall be at the side with the largest number of pins. The
coil former shall show an asymmetry which shall preferably be visible (or detectable) when the
assembled inductor is held with the pins downwards. This asymmetry shall clearly indicate pin 1.
For pin numbering of recommended core patterns and for recommended asymmetrical pin
arrangements, see 3.1.
NOTE It is not required that the pin numbers be marked on the coil former.
3.4 Effective parameter values
The effective parameter values for cores having the dimensions given in 3.2 and 3.5 are as shown
in Table 3 and Table 4.
3.5 Spring recess
RM-cores shall have recesses which allow the core halves to be held together by two spring
clamps snapping into these recesses. The recesses consist of a flat spring rest and a locking
ridge. The dimensions are given in Table 5; the profile of this spring recess is not defined but the
limit dimensions shall be complied with.
3.6 Stud recess
Those RM-cores with centerpost holes may have recesses for the fixed part of the adjusting
device with dimensions in accordance with Table 6. These dimensions are not mandatory for
manufacturers who supply cores with the fixed part of the adjusting device attached.

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SIST EN 62317-4:2006
62317-4  IEC:2005(E)                    – 7 –

The dimensions specified in Table 1 are illustrated in Figure 1.
2B
2D
A
A
A
A
M


G
G
G
G
C
C
C
R
C

Type 4
Type 2

Type 1 Type 3
Section X-X
IEC  1475/05
Figure 1 – Dimensions of RM-cores
Table 1 – Dimensions of RM-cores
a)
A B C D E F G H J R
mm mm mm mm mm mm mm mm mm mm
Size Type
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Max. Min. Max. Max.
RM 4 10,6 11,8 5,15 5,25 4,40 4,60 3,50 3,70 7,95 8,35 3,70 3,90 5,80 2,0 2,1 9,40 9,80 0,3 3
RM 5 14,0 14,9 5,15 5,25 6,40 6,80 3,15 3,35 10,2 10,6 4,07 4,90 6,00 2,0 2,1 11,8 12,3 0,3 3
RM 6-S 17,2 18,3 6,15 6,25 7,80 8,20 4,00 4,20 12,4 12,9 6,10 6,40 8,40 3,0 3,1 14,1 14,7 0,3 1
RM 6-R 17,2 18,3 6,15 6,25 7,00 7,40 4,00 4,20 12,4 12,9 6,10 6,40 8,40 3,0 3,1 14,1 14,7 0,3 4
RM 7 19,5 20,3 6,65 6,75 6,95 7,25 4,20 4,45 14,75 15,4 6,95 7,25 9,30 3,0 3,1 16,5 17,2 0,3 2
RM 8 22,3 23,2 8,15 8,25 10,6 11,0 5,40 5,65 17,0 17,7 8,25 8,55 9,50 4,4 4,6 18,9 19,7 0,3 3
RM 10 27,2 28,5 9,25 9,35 13,0 13,5 6,20 6,50 21,2 22,1 10,5 10,9 10,9 5,4 5,6 23,6 24,7 0,3 3
RM 12 36,1 37,4 12,2 12,3 15,6 16,1 8,40 8,70 25,0 26,0 12,3 12,8 12,9 - - 28,7 29,8 0,3 3
RM 14 40,8 42,2 14,4 14,5 18,4 19,0 10,4 10,7 29,0 30,2 14,4 15,0 17,0 5,4 5,6 33,5 34,7 0,3 3
RM 14A 40,8 42,2 15,0 15,1 18,4 19,0 10,4 10,7 29,0 30,2 14,4 15,0 17,0 - - 33,5 34,7 0,3 3
a)
Solid centerpost cores are available for each size.
J
J
J
J
H
F
E

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SIST EN 62317-4:2006
– 8 –                  62317-4  IEC:2005(E)

The dimensions specified in Table 2 are illustrated in Figure 2.
2B

2D

A
A
A


G
G G

C
C
C
R

Type 2
Type 1
Section X-X
Type 3
IEC  1476
...