SIST EN 62358:2005
(Main)Ferrite cores - Standard inductance factor (AL) and its tolerance
Ferrite cores - Standard inductance factor (AL) and its tolerance
Provides standard inductance factors (AL) and their tolerances for Pot, RM, ETD, EE, EP, EL and low-profile ferrite cores. Is recommended for users and manufacturers.
Ferritkerne - Standard-Induktivitätsfaktor (AL) und dessen Toleranz
Noyaux de ferrite - Inductance spécifique normalisée (AL) et tolérances associées
Fournit les inductances spécifiques normalisées (AL) ainsi que les tolérances associées des circuits magnétiques en pots, des noyaux carrés (RM), des noyaux ETD, des noyaux EE, des noyaux EP, des noyaux EL, des noyaux faible hauteur et des noyaux BMP en ferrites. Est recommandé aussi bien aux utilisateurs qu'aux fabricants.
Feritna jedra – Standardni faktor induktance (AL) in njegova toleranca (IEC 62358:2004)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 62358:2005
STANDARD
marec 2005
Feritna jedra – Standardni faktor induktance (AL) in njegova toleranca (IEC
62358:2004)
Ferrite cores - Standard inductance factor (AL) and its tolerance (IEC 62358:2004)
ICS 29.100.10 Referenčna številka
SIST EN 62358:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 62358
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2004
ICS 29.100.10
English version
Ferrite cores –
Standard inductance factor (A )
L
and its tolerance
(IEC 62358:2004)
Noyaux de ferrite – Ferritkerne –
Inductance spécifique normalisée (A ) Standard-Induktivitätsfaktor (A )
L L
et tolérances associées und dessen Toleranz
(CEI 62358:2004) (IEC 62358:2004)
This European Standard was approved by CENELEC on 2004-07-01. 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 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 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
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62358:2004 E
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EN 62358:2004 - 2 -
Foreword
The text of document 51/756/FDIS, future edition 1 of IEC 62358, 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 62358 on 2004-07-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2005-04-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2007-07-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62358:2004 was approved by CENELEC as a European
Standard without any modification.
__________
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- 3 - EN 62358:2004
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
ISO 497 1973 Guide to the choice of series of preferred - -
numbers and series containing more
rounded values of preferred numbers
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NORME CEI
INTERNATIONALE
IEC
62358
INTERNATIONAL
Première édition
STANDARD
First edition
2004-05
Noyaux de ferrite –
Inductance spécifique normalisée (A )
L
et tolérances associées
Ferrite cores –
Standard inductance factor (A )
L
and its tolerance
IEC 2004 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. 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
CODE PRIX
R
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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62358 IEC:2004 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9
1 Scope.11
2 Normative references.11
3 Measuring method.11
4 A value and its tolerance.11
L
4.1 Tolerance.11
4.2 EE core.11
4.3 ETD core.11
4.4 EP core.13
4.5 RM core.13
4.6 EL core.13
4.7 Pot core.13
4.8 Low-profile core.13
Annex A (informative) Dimensions of EE and round centre-pole E cores in addition to
IEC standard sizes in Tables 2 and 3.31
Annex B (informative) Effective parameter values .37
Figure A.1 – Dimensions of EE cores.31
Figure A.2 – Dimensions of ETD and round centre pole E cores .35
Table 1 – Tolerance versus letter code .11
Table 2 – A and its tolerance for EE cores.15
L
Table 3 – A and its tolerance for ETD and round centre pole E cores .19
L
Table 4 – A and its tolerance for EP cores.21
L
Table 5 – A and its tolerance for RM cores .21
L
Table 6 – A and its tolerance for EL cores .23
L
Table 7 – A and its tolerance for pot cores .25
L
Table 8 – A and its tolerance for low-profile ER cores.27
L
and its tolerance for low-profile E-I cores.27
Table 9 – A
L
Table 10 – A and its tolerance for low-profile E cores .29
L
Table 11 – A and its tolerance for low-profile RM cores .29
L
Table A.1 – Dimensions of EE cores in addition to IEC standard sizes in Table 2 .31
Table A.2 – Dimensions of round centre pole E cores in addition to IEC standard sizes
in Table 3 .35
Table B.1 – Effective parameter values of EE cores in addition to IEC standard sizes
in Table 2 .37
Table B.2 – Effective parameter values of round centre pole E cores in addition to IEC
standard sizes in Table 3 .39
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62358 IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FERRITE CORES –
STANDARD INDUCTANCE FACTOR (A )
L
AND ITS TOLERANCE
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 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 62358 has been prepared by IEC technical committee 51:
Magnetic components and ferrite materials.
The text of this standard is based on the following documents:
FDIS Report on voting
51/756/FDIS 51/769/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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62358 IEC:2004 – 7 –
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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62358 IEC:2004 – 9 –
INTRODUCTION
The A value (inductance factor) and its tolerance have been specified by the users. When
L
manufacturers wish to have an inventory for short delivery, they have to hold the products
before gapping since there is no standard for the A value. Because of electronic commerce
L
and the increased demand for rapid delivery of products, it will be more convenient for
customers and suppliers to refer to established A values and tolerances. This standard has
L
been developed to meet this demand.
As a result of the implementation of this standard, it will be easier for core suppliers and users
to develop electronic components using gapped soft ferrite cores. Conventional businesses
will benefit, as will new companies working in new fields such as e-commerce.
It is recommended that users specify A values by selecting them from this standard when
L
possible. Manufacturers are encouraged to use the A values in this standard when building
L
stocks of gapped cores for short delivery.
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62358 IEC:2004 – 11 –
FERRITE CORES –
STANDARD INDUCTANCE FACTOR (A )
L
AND ITS TOLERANCE
1 Scope
This International Standard provides standard A values and its tolerances of Pot, RM, ETD,
L
EE, EP, EL and low-profile ferrite cores.
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.
ISO 497, Guide to the choice of series of preferred numbers and of series containing more
rounded values of preferred numbers
3 Measuring method
1
The method for measuring the inductance factor shall be in accordance with IEC 62044-2 .
4 A value and its tolerance
L
The series of preferred numbers of the A value shall be selected from ISO 497-R10 series.
L
4.1 Tolerance
The tolerance shall be selected from Table 1, which specifies letter codes for the tolerances.
Table 1 – Tolerance versus letter code
Tolerance
± 3 ± 5 ± 7 ± 10 ± 12 ± 15 ± 20
%
Letter code A J E K H L M
4.2 EE core
The A value and its tolerance for EE cores shall be selected from Table 2.
L
4.3 ETD core
The A value and its tolerance for ETD cores shall be selected from Table 3.
L
———————
1
IEC 62044-2, Cores made of soft magnetic materials – Measuring methods – Part 2: Magnetic properties at low
excitation level (under consideration)
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62358 IEC:2004 – 13 –
4.4 EP core
The A value and its tolerance for EP cores shall be selected from Table 4.
L
4.5 RM core
The A value and its tolerance for RM cores shall be selected from Table 5.
L
4.6 EL core
The A value and its tolerance for EL cores shall be selected from Table 6.
L
4.7 Pot core
The A value and its tolerance for Pot cores shall be selected from Table 7.
L
4.8 Low-profile core
The A value and its tolerance for low-profile cores s
...
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