IEC 62317-1:2007

Ferrite cores - Dimensions - Part 1: General specification

IEC 62317-1:2007 specifies the standards and existing projects dealing with dimensions of ferrite cores. It is intended that this standard will include ferrite cores which are widely used and referenced in industry, either because they are included in national standards, or because they are seen to have broad-based use in industry. Where applicable, it is intended that the existing industrial name for each standard part should appear with the part within this series.

Noyaux ferrites - Dimensions - Partie 1: Spécification générale

La CEI 62317-1:2007 spécifie les normes et les projets existants traitant des dimensions de noyaux ferrites. Il est prévu que la présente norme inclura des noyaux ferrites largement utilisés et référencés dans l'industrie, soit parce qu'ils sont inclus dans des normes nationales, soit parce qu'ils sont utilisés à grande échelle dans l'industrie. Lorsque cela est applicable, il convient que le nom industriel existant pour chaque composant normalisé apparaisse avec le composant dans cette série.

General Information

• Status: Replaced
• Publication Date: 10-Jul-2007
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: WG 1 - TC 51/WG 1
• Current Stage: DELPUB - Deleted Publication
• Start Date: 28-Jun-2019
• Completion Date: 16-Apr-2020

Relations

• Replaced By: IEC 63093-1:2020 - Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 1: General specification
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 62317-1
First edition
2007-07
Ferrite cores –
Dimensions –
Part 1:
General specification
Reference number
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
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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INTERNATIONAL IEC
STANDARD 62317-1
First edition
2007-07
Ferrite cores –
Dimensions –
Part 1:
General specification
PRICE CODE
Commission Electrotechnique Internationale H
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62317-1 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FERRITE CORES –
DIMENSIONS –
Part 1: General specification
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 62317-1 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
The text of this standard is based on the following documents:
CDV Report on voting
51/874/CDV 51/890/RVC
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.
A list of all parts of IEC 62317 series, published under the general title Ferrite cores –
Dimensions, can be found on the IEC website.

62317-1 © IEC:2007(E) – 3 –
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.

– 4 – 62317-1 © IEC:2007(E)
FERRITE CORES –
DIMENSIONS –
Part 1: General specification
1 Scope
This part of IEC 62317 specifies the standards and existing projects dealing with dimensions

of ferrite cores.
It is intended that this standard will include ferrite cores which are widely used and referenced
in industry, either because they are included in national standards, or because they are seen
to have broad-based use in industry. Where applicable, it is intended that the existing
industrial name for each standard part should appear with the part within this series.
It is intended that this standard will exclude ferrite cores which are specialty cores with limited
use. Also, special cores which are only marginal variations upon standard cores are excluded.
Examples:
E24/25 (USA) and E24,5 (Metric) are two similar parts, yet they are included
separately in this series because they are national standards, widely used.
E-187 (USA) and FEE19A (Japan) are two similar parts, yet they are included
separately in this series because they are national standards, widely used.
EP5 has small dimensional differences when comparing different manufacturers, yet
only one EP5 is shown in this seri
...

IEC 62317-1 ®
Edition 1.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 1: General specification
Noyaux ferrites – Dimensions –
Partie 1: Spécification générale

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.

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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.

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IEC 62317-1 ®
Edition 1.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 1: General specification
Noyaux ferrites – Dimensions –

Partie 1: Spécification générale

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX H
ICS 29.100.10 ISBN 978-2-83220-707-9

– 2 – 62317-1  IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FERRITE CORES –
DIMENSIONS –
Part 1: General specification
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 62317-1 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
This bilingual version (2013-05) corresponds to the monolingual English version, published in
2007-07.
The text of this standard is based on the following documents:
CDV Report on voting
51/874/CDV 51/890/RVC
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.

62317-1  IEC:2007 – 3 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of IEC 62317 series, published under the general title Ferrite cores –

Dimensions, can be found on the IEC website.

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.
– 4 – 62317-1  IEC:2007
FERRITE CORES –
DIMENSIONS –
Part 1: General specification
1 Scope
This part of IEC 62317 specifies the standards and existing projects dealing with dimensions

of ferrite cores.
It is intended that this standard will include ferrite cores which are widely used and referenced
in industry, either because they are included in national standards, or because they are seen
to have broad-based use in industry. Where applicable, it is intended that the existing
industrial name for each standard part should appear with the part within this series.
It is intended that this standard will exclude ferrite cores which are specialty cores with limited
use. Also, special cores which are only marginal variations upon standard cores are excluded.
Examples:
E24/25 (USA) and E24,5 (Metric) are two similar parts, yet they are included
separately in this series because they are national standards, widely used.
E-187 (USA) and FEE19A (Japan) are two similar parts, yet they are included
separately in this series because they are national standards, widely used.
EP5 has small dimensional differences when comparing different manufacturers, yet
only one EP5 is shown in this series, because they are only minor variations on the
single basic part.
A ferrite core produced by only one or two suppliers may generally be considered a
specialty part, and not suitable as a standard core within this series. A ferrite core
produced by three or more competing manufacturers may generally be considered to
be a candidate to be included in this series.
IEC publishes electrical standards for families of ferrite cores, as well as this series of
dimensional standards for families of ferrite cores. Modifications to the ferrite cores listed in
one type of standard should be reflected in the other type.

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 60133, Dimensions of pot-cores made of magnetic oxides and associated parts
IEC 60647, Dimensions for magnetic oxide cores intended for use in power supplies (EC-
cores)
IEC 61185, Ferrite cores (ETD-cores) intended for use in power supply applications –
Dimensions
62317-1  IEC:2007 – 5 –
IEC 61247, PM-cores made of magnetic oxides and associated parts – Dimensions

IEC 61596, Magnetic oxide EP-cores and associated parts for use in inductors and

transformers – Dimensions
IEC 62317-4, Ferrite cores – Dimensions – Part 4: RM-cores and associated parts

IEC 62317-7, Ferrite cores – Dimensions – Part 7: EER-cores

IEC 62317-8, Ferrite cores – Dimensions – Part 8: E-cores

IEC 62317-9, Ferrite cores – Dimensions – Part 9: Planar cores
IEC 62323, Dimensions of half pot-cores made of ferrite for inductive proximity switches
IEC/TR 61604, Dimensions of uncoated ring cores of magnetic oxides
3 Transition of existing publications and projects
The standards that are to be included within the IEC 62317 series include existing standards,
future standards already in development, and future standards that may be developed later.
The new references should be recorded on the IEC web site as follows:
a) for existing projects: the new project numbers should be recorded on the IEC web site at
the time of circulation of next working drafts, with an explanatory note on the cover sheet;
b) for existing publications: the publication numbers should be updated at the time of each
new revision of these standards. An explanatory note should be included in the foreword
of future publications;
c) for future new projects, the new project numbers should be selected to be consistent with
the IEC 62317 series.
A table showing existing project (or publication) references and the proposed new project (or
publication) references is given in Table A.1.
4 Dimension descriptions
Table 1 and Table 2 describe the alphabetic character assignments for the major dimensions
of ferrite shapes. All other minor core dimension designations are left to the discretion of the
specifier.
Table 1 – Toroid core dimension designations
Letter Dimension description
A Toroid outside diameter
B Toroid inside diameter
C Toroid height
– 6 – 62317-1  IEC:2007
Table 2 – Ferrite shape dimension designations

Letter Dimension description
A Overall length of the core back or diameter

B Outside leg length or height of core

C Core width or floor width at wire aperture

D Inside leg length o
...