EN IEC 63093-4:2019

SLOVENSKI STANDARD
SIST EN 63093-4:2019
01-september-2019
Nadomešča:
SIST EN 60424-2:2016
SIST EN 62317-4:2006
SIST EN 62317-4:2006/AC:2016-09:2018
Feritna jedra - Smernice o merah in mejnih vrednostih površinskih nepravilnosti -
4. del: RM-jedra (IEC 63093-4:2019)
Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4:
RM-cores (IEC 63093-4:2019)
Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4:
RM-cores
Ta slovenski standard je istoveten z: EN IEC 63093-4:2019
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 63093-4:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 63093-4:2019
SIST EN 63093-4:2019
EUROPEAN STANDARD EN IEC 63093-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 29.100.10 Supersedes EN 60424-2:2016, EN 62317-4:2005
English Version
Ferrite cores - Guidelines on dimensions and the limits of
surface irregularities - Part 4: RM-cores
(IEC 63093-4:2019)
Noyaux ferrites - Lignes directrices relatives aux Ferritkerne - Richtlinien zu Maßen und Grenzen von
dimensions et aux limites des irrégularités de surface - Oberflächenbeschädigungen - Teil 4: RM-Kerne
Partie 4: Noyaux RM (IEC 63093-4:2019)
(IEC 63093-4:2019)
This European Standard was approved by CENELEC on 2019-04-12. 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 63093-4:2019 E

SIST EN 63093-4:2019
European foreword
The text of document 51/1265/FDIS, future edition 1 of IEC 63093-4, 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 63093-4:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-01-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-04-12
document have to be withdrawn
This document supersedes EN 60424-2:2016, EN 62317-4:2005.
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 63093-4:2019 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 60424-2:2015 NOTE Harmonized as EN 60424-2:2016 (not modified)
IEC 62044-2 NOTE Harmonized as EN 62044-2
IEC 62317-2 NOTE Harmonized as EN 62317-2

SIST EN 63093-4:2019
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
SIST EN 63093-4:2019
SIST EN 63093-4:2019
IEC 63093-4 ®
Edition 1.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface irregularities –

Part 4: RM-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des

irrégularités de surface –
Partie 4: Noyaux RM
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-6615-1

SIST EN 63093-4:2019
– 2 – IEC 63093-4:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Primary dimensions . 7
4.1 General . 7
4.2 Dimensions of RM-cores . 7
4.2.1 Principal dimensions . 7
4.2.2 Effective parameter and A values . 7
min
4.3 Main dimensions for coil formers . 7
4.3.1 Shape of coil former and pin numbering . 7
4.3.2 Dimensions of coil formers for RM-cores for the primary standard . 7
4.3.3 RM-cores intended particularly for power applications . 7
4.4 Pin locations and base outlines . 7
4.5 Spring recess . 8
4.6 Stud recess . 8
5 Mounting . 21
6 Limits of surface irregularities . 21
6.1 General . 21
6.2 Examples of surface irregularities . 21
6.3 Chips and ragged edges . 21
6.3.1 General . 21
6.3.2 Chip and ragged edges located on the mating surface . 21
6.3.3 Chips and ragged edges located on other surfaces . 22
6.4 Cracks . 24
6.5 Pull-out . 26
6.6 Crystallites . 27
6.7 Flash . 27
6.8 Pores . 28
Annex A (informative) RM-core design . 29
A.1 General . 29
A.2 Pin locations and base outlines . 29
A.3 Design considerations and dimensions . 29
A.4 Practical considerations . 30
Annex B (normative) Guidance for measuring clamping forces relevant to RM-core
tests . 31
B.1 Test conditions and clamping forces . 31
B.2 Clamping procedure . 31
Annex C (informative) Examples of allowable areas of chips . 33
Bibliography . 34

Figure 1 – Dimensions of RM-cores . 9
Figure 2 – Dimensions of low-profile RM-cores . 10
Figure 3 – Dimensions of spring recess . 12
Figure 4 – Dimensions of stud recess . 13

SIST EN 63093-4:2019
IEC 63093-4:2019 © IEC 2019 – 3 –
Figure 5 – Main dimensions of coil formers for RM-cores . 14
Figure 6 – Pin locations and base outlines viewed from the underside of the board . 16
Figure 7 – Dimensions of specific features . 18
Figure 8 – Pin locations and base outlines viewed from the underside of the board . 20
Figure 9 – Examples of surface irregularities . 21
Figure 10 – Chips on mating surfaces . 22
Figure 11 – Location of cracks – Top view . 24
Figure 12 – Location of cracks – Bottom view . 24
Figure 13 – Dimension W . 26
Figure 14 – Location of pull-out . 26
Figure 15 – Pull-out in the clamping recess area . 27
Figure 16 – Location of a crystallite . 27
Figure 17 – Location of a flash . 28
Figure 18 – Location of pore . 28
Figure B.1 – Mounting device. 31

Table 1 – Dimensions of RM-cores . 9
Table 2 – Dimensions of low-profile RM-cores . 10
Table 3 – Effective parameter and A values for RM-cores . 11
min
Table 4 – Effective parameter and A values for low-profile RM-cores. 12
min
Table 5 – Dimensions of spring recess . 13
Table 6 – Dimensions of stud recess . 13
Table 7 – Dimensional limits for coil formers for RM-cores . 14
Table 8
...