Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 14: EFD-cores

This part of IEC 63093 specifies the dimensions that are of importance for mechanical
interchangeability for a preferred range of EFD-cores, the essential dimensions of coil formers
to be used with them, and the effective parameter values to be used in calculations involving
them. It also gives guidance on the allowable limits of surface irregularities applicable to EFDcores
in accordance with the relevant generic specification.
The selection of core sizes for this document is based on the philosophy of including those
sizes which are industrial standards, either by inclusion in national standards, or by broadbased
use in industry.
This document is a specification useful in the negotiation between ferrite core manufacturers
and users about surface irregularities.
The general considerations that the design of this range of cores is based upon are given in
Annex A.

Ferritkerne - Richtlinien zu Maßen und Grenzen von Oberflächenbeschädigungen - Teil 14: EFD-Kerne

Noyaux ferrites - Lignes directrices relatives aux dimensions et aux limites des irrégularités de surface - Partie 14: Noyaux EFD

La présente partie de l’IEC 63093 spécifie les dimensions qui présentent une importance pour l'interchangeabilité mécanique d'une plage préférentielle de noyaux EFD, les dimensions essentielles des supports de bobine à utiliser avec les noyaux EFD, ainsi que les valeurs des paramètres effectifs à utiliser dans les calculs qui impliquent ces noyaux. Elle donne également des recommandations relatives aux limites admissibles des irrégularités de surface applicables aux noyaux EFD conformément à la spécification générique correspondante. Le choix des tailles des noyaux pour le présent document est fondé sur la philosophie consistant à introduire les tailles qui correspondent à des normes industrielles, soit par inclusion dans des normes nationales, soit par utilisation à grande échelle dans l’industrie. Le présent document est une spécification utile à la négociation entre les fabricants et les utilisateurs de noyaux ferrites sur les irrégularités de surface. Les considérations générales sur lesquelles repose la conception de cette plage de noyaux figurent dans l’Annexe A.

Feritna jedra - Smernice o merah in mejnih vrednostih površinskih nepravilnosti - 14. del: EFD-jedra

Ta del standarda IEC 63093 določa mere, ki so pomembne za mehansko medsebojno zamenljivost prednostnega razpona EFD-jeder, bistvene mere tuljave, ki
se uporablja s temi jedri, in vrednosti efektivnih parametrov, ki se uporabljajo pri izračunih, povezanih z
jedri. Podaja tudi navodila glede omejitev površinskih nepravilnosti, ki veljajo za EFD-jedra
v skladu z ustrezno splošno specifikacijo.
Izbira velikosti jeder za ta standard temelji na načelu vključevanja tistih
velikosti, ki se na podlagi vključenosti v nacionalni standard ali vsesplošne uporabe v industriji smatrajo za industrijske
velikosti.
Ta dokument je specifikacija, uporabna za sklepanje dogovorov o površinskih nepravilnostih
med proizvajalci in uporabniki feritnih jeder.
Splošni premisleki, na podlagi katerih temelji zasnova tega razpona jeder, so podani v
dodatku A.

General Information

Status
Published
Publication Date
11-Aug-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Jul-2019
Due Date
16-Sep-2019
Completion Date
12-Aug-2019

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SLOVENSKI STANDARD
SIST EN IEC 63093-14:2019
01-september-2019

Feritna jedra - Smernice o merah in mejnih vrednostih površinskih nepravilnosti -

14. del: EFD-jedra

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 14:

EFD-cores
Ta slovenski standard je istoveten z: EN IEC 63093-14:2019
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN IEC 63093-14:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 63093-14:2019
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SIST EN IEC 63093-14:2019
EUROPEAN STANDARD EN IEC 63093-14
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 29.100.10 Supersedes EN 62317-14:2008
English Version
Ferrite cores - Guidelines on dimensions and the limits of
surface irregularities - Part 14: EFD-cores
(IEC 63093-14:2019)

Noyaux ferrites - Lignes directrices relatives aux Ferritkerne - Richtlinien zu Maßen und Grenzen von

dimensions et aux limites des irrégularités de surface - Oberflächenbeschädigungen - Teil 14: EFD-Kerne

Partie 14: Noyaux EFD (IEC 63093-14:2019)
(IEC 63093-14:2019)

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 63093-14:2019 E
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SIST EN IEC 63093-14:2019
EN IEC 63093-14:2019 (E)
European foreword

The text of document 51/1272A/FDIS, future edition 1 of IEC 63093-14, 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 63093-14:2019.
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 62317-14:2008.

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 63093-14:2019 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 63093-14:2019
EN IEC 63093-14:2019 (E)
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 magnetic EN 60205 -
piece parts
IEC 60401 - Ferrite materials - Guide on the format of data - -
appearing in manufacturers' catalogues of
transformer and inductor cores

IEC 60424-1 - Ferrite cores - Guidelines on the limits of surface EN 60424-1 -

irregularities - Part 1: General specification
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SIST EN IEC 63093-14:2019
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SIST EN IEC 63093-14:2019
IEC 63093-14
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE

Ferrite cores – Guidelines on dimensions and the limits of surface irregularities –

Part 14: EFD-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des
irrégularités de surface –
Partie 14: Noyaux EFD
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-6764-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 63093-14:2019
– 2 – IEC 63093-14:2019 © 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 EFD-cores ....................................................................................... 7

4.2.1 Principal dimensions ........................................................................................ 7

4.2.2 Effective parameter and A values ............................................................... 8

min

4.3 Dimensional limits for coil formers........................................................................... 8

4.4 Locations of pins and base outlines ........................................................................ 9

4.5 Pin diameter ......................................................................................................... 12

5 Mounting ....................................................................................................................... 12

6 Definitions and limits of surface irregularities ................................................................. 12

6.1 General ................................................................................................................. 12

6.2 Examples of surface irregularities ......................................................................... 12

6.3 Chips and ragged edges ....................................................................................... 12

6.3.1 General ......................................................................................................... 12

6.3.2 Chips and ragged edges located on the mating surface ................................. 12

6.3.3 Chips and ragged edges located on other surfaces ........................................ 13

6.4 Cracks .................................................................................................................. 15

6.5 Pull-out ................................................................................................................. 16

6.6 Crystallites ............................................................................................................ 16

6.7 Flash .................................................................................................................... 16

6.8 Pores .................................................................................................................... 17

Annex A (informative) EFD-core design ............................................................................... 18

Annex B (informative) Limits for allowable chipping areas .................................................... 19

Figure 1 – Dimensions of EFD-cores ....................................................................................... 7

Figure 2 – Main dimensions of coil formers for EFD-cores ...................................................... 8

Figure 3 – Locations of pins (SMD type) viewed from the upper side of the board ................. 10

Figure 4 – Locations of pins (PTH type) viewed from the upper side of the board .................. 11

Figure 5 – Examples of surface irregularities ........................................................................ 12

Figure 6 – Locations of chips and ragged edges ................................................................... 13

Figure 7 – Locations of cracks .............................................................................................. 15

Figure 8 – Location of pull-out .............................................................................................. 16

Figure 9 – Location of crystallite ........................................................................................... 16

Figure 10 – Location of flash ................................................................................................. 17

Figure 11 – Location of pore ................................................................................................. 17

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SIST EN IEC 63093-14:2019
IEC 63093-14:2019 © IEC 2019 – 3 –

Table 1 – Dimensions of EFD-cores ........................................................................................ 7

Table 2 – Effective parameter and A values for EFD-cores ................................................ 8

min

Table 3 – Dimensional limits of coil formers for EFD-cores ..................................................... 9

Table 4 – Area and length reference of irregularities for visual inspection ............................. 14

Table 5 – Limits for cracks .................................................................................................... 15

Table B.1 – Limits for allowable chipping areas..................................................................... 19

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SIST EN IEC 63093-14:2019
– 4 – IEC 63093-14:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES –
GUIDELINES ON DIMENSIONS AND
THE LIMITS OF SURFACE IRREGULARITIES –
Part 14: EFD-cores
FOREWORD

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