EN IEC 63093-12:2019

SLOVENSKI STANDARD
01-september-2019
Feritna jedra - Smernice o merah in mejnih vrednostih površinskih nepravilnosti -
12. del: Obročasta jedra
Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 12:
Ring-cores
Ta slovenski standard je istoveten z: EN IEC 63093-12:2019
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 63093-12

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 29.100.10 Supersedes EN 62317-12:2016
EN 60424-4:2016
English Version
Ferrite cores - Guidelines on dimensions and the limits of
surface irregularities - Part 12: Ring-cores
(IEC 63093-12:2019)
Noyaux ferrites - Lignes directrices relatives aux Ferritkerne - Richtlinien zu Maßen und Grenzen von
dimensions et aux limites des irrégularités de surface - Oberflächenbeschädigungen - Teil 12: Ringkerne
Partie 12: Noyaux toriques (IEC 63093-12:2019)
(IEC 63093-12:2019)
This European Standard was approved by CENELEC on 2019-05-09. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63093-12:2019 E

European foreword
The text of document 51/1271/FDIS, future edition 1 of IEC 63093-12, 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 63093-12:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-02-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-05-09
document have to be withdrawn
This document supersedes EN 62317-12:2016 and EN 60424-4:2016
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 63093-12:2019 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 60401-2 NOTE Harmonized as EN 60401-2
IEC 60424-4 NOTE Harmonized as EN 60424-4
IEC 62317-1 NOTE Harmonized as EN 62317-1

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 surface EN 60424-1 -
irregularities - Part 1: General specification

IEC 63093-12 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface irregularities –

Part 12: Ring-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des

irrégularités de surface –
Partie 12: Noyaux toriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-6715-8

– 2 – IEC 63093-12:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Primary dimensions . 5
4.1 General . 5
4.2 Dimensions of ring-cores . 6
4.2.1 Designation of dimensions . 6
4.2.2 Identification of standard sizes . 6
4.2.3 Effective parameter values. 6
4.2.4 Dimensional limits for standard sizes . 7
4.3 Coating . 13
5 Limits of surface irregularities . 13
5.1 Uncoated ring-cores . 13
5.1.1 General. 13
5.1.2 Chips and ragged edges . 13
5.1.3 Cracks and pull-outs . 14
5.1.4 Crystallites . 14
5.1.5 Pores . 15
5.2 Coated ring-cores . 15
5.2.1 General. 15
5.2.2 Coating features . 15
5.2.3 Coating performance . 16
5.3 Area and length reference for visual inspection . 16
Bibliography . 18

Figure 1 – Dimensions of ring-cores . 6
Figure 2 – Location of chips and ragged edges on ring-cores . 14
Figure 3 – Location of cracks and pull-out on ring-cores . 14
Figure 4 – Location of crystallite on ring-cores . 15
Figure 5 – Location of pore on ring-cores . 15

Table 1 – Ring-core dimension designations . 6
Table 2 – Standard ring-cores . 7
Table 3 – Effective parameters of ring-cores . 9
Table 4 – Recommended dimensional limits for uncoated ring-cores . 11
Table 5 – Area and length reference for visual inspection . 17

IEC 63093-12:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 12: Ring-cores
FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 63093-12 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This first edition cancels and replaces the first edition of IEC 62317-12 published in 2016 and
the second edition of IEC 60424-4 published in 2015. This edition constitutes a technical
revision.
This edition includes the following significant technical changes with respect to IEC 62317-
12:2016 and IEC 60424-4:2015:
a) IEC 63093-12 integrates the contents of IEC 62317
...