EN IEC 63093-8:2018

SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 60424-3:2016
SIST EN 62317-8:2007
Feritna jedra - Smernice o merah in mejnih vrednostih površinskih nepravilnosti -
8. del: E-jedra
Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 8:
E-cores
Ta slovenski standard je istoveten z: EN IEC 63093-8:2018
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 IEC 63093-8

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2018
ICS 29.100.10 Supersedes EN 60424-3:2016 (partially), EN 62317-
8:2006
English Version
Ferrite cores - Guidelines on dimensions and the limits of
surface irregularities - Part 8: E-cores
(IEC 63093-8:2018)
Noyaux ferrites - Lignes directrices relatives aux Ferritkerne - Richtlinien zu Maßen und Grenzen von
dimensions et limites des irrégularités de surface - Partie 8 : Oberflächenbeschädigungen - Teil 8: E-Kerne
Noyaux E (IEC 63093-8:2018)
(IEC 63093-8:2018)
This European Standard was approved by CENELEC on 2018-06-04. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63093-8:2018 E

European foreword
The text of document 51/1213/CDV, future edition 1 of IEC 63093-8, prepared by IEC/TC 51
"Magnetic components, ferrite and magnetic powder materials" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 63093-8:2018.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2018-03-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-09-28
document have to be withdrawn
This document supersedes EN 62317-8:2006.

This document together with EN IEC 63093-6:2018, EN IEC 63083-7:2018 and
EN IEC 63093-11:2018 supersedes EN 60424-3:2015.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 63093-8:2018 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60424-3:2015 NOTE Harmonized as EN 60424-3:2016 (not modified)
IEC 62317-8:2006 NOTE Harmonized as EN 62317-8:2006 (not modified)

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60205 -  Calculation of the effective parameters of EN 60205 -
magnetic piece parts
IEC 60401-1 -  Terms and nomenclature for cores made of EN 60401-1 -
magnetically soft ferrites - Part 1: Terms
used for physical irregularities
IEC 60424-1 -  Ferrite cores - Guidelines on the limits of EN 60424-1 -
surface irregularities - Part 1: General
specification
IEC 63093-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Ferrite cores – Guidelines on dimensions and the limits of surface

irregularities –
Part 8: E-cores
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-5835-4

– 2 – IEC 63093-8:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Primary dimensions . 6
4.1 General . 6
4.2 Dimensions of E-cores . 7
4.2.1 Main dimensions . 7
4.2.2 Effective parameter and A values . 9
min
4.3 Dimensional limits for coil formers . 11
5 Limits of surface irregularities . 15
5.1 General . 15
5.2 Examples of surface irregularities . 15
5.3 Chips and ragged edges . 15
5.3.1 General . 15
5.3.2 Chips and ragged edges on the mating surfaces . 15
5.3.3 Chips and ragged edges on the other surfaces . 15
5.4 Cracks . 18
5.5 Flash . 18
5.6 Pull-outs . 18
5.7 Crystallites . 19
5.8 Pores . 19
Annex A (normative) Derived standards . 21
Annex B (normative) Example of dimensions for gauges to check the dimensions of
E-cores complying with this document . 22
B.1 General . 22
B.2 Procedure and requirements . 24
Annex C (informative) Reference of allowable areas of chips . 25
Bibliography . 26

Figure 1 – Dimensions of E-cores with rectangular cross-section . 7
Figure 2 – Main dimensions of coil formers . 12
Figure 3 – Examples of surface irregularities . 15
Figure 4 – Chip location for E-cores . 16
Figure 5 – Crack and pull-out locations for E-cores . 18
Figure 6 – Crystallite location for E-cores . 19
Figure 7 – Pore location for E-cores . 20
Figure B.1 – Gauge dimensions . 22

Table 1 – Dimensions of E-cores with rectangular cross-section . 8
Table 2 – Effective parameter and A values . 10
min
Table 3 – Dimensional limits for coil formers . 13
Table 4 – Area and length reference for visual inspection . 17
Table 5 – Limits for cracks . 19

IEC 63093-8:2018 © IEC 2018 – 3 –
Table B.1 – Gauge dimensions . 23
Table C.1 – Allowable areas of chips for E-cores . 25

– 4 – IEC 63093-8:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 8: E-cores
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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
...