IEC 62317-11:2015

IEC 62317-11 ®
Edition 1.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 11: EC-cores for use in power supply applications

Noyaux ferrites – Dimensions –
Partie 11: Noyaux EC utilisés dans des applications d’alimentation électrique

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IEC 62317-11 ®
Edition 1.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 11: EC-cores for use in power supply applications

Noyaux ferrites – Dimensions –

Partie 11: Noyaux EC utilisés dans des applications d’alimentation électrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-2961-3

– 2 – IEC 62317-11:2015 © IEC 2015

CONTENTS
FOREWORD . 3

INTRODUCTION . 5

1 Scope . 6

2 Normative references . 6

3 Primary standards . 6

3.1 General . 6

3.2 Dimensions of EC-cores. 6
3.2.1 Principal dimensions . 6
3.2.2 Effective parameter and A values . 6
min
3.3 Main dimensions for coil formers . 9
Annex A (normative) Example of standard coil formers . 10
Annex B (normative) Calculation of the effective parameters of EC-cores . 13
Bibliography . 15

Figure 1 – Principal dimensions of EC-cores . 7
Figure 2 – Main dimensions of coil formers for EC-cores. 9
Figure A.1 – Main dimensions of coil formers for EC35, EC41, EC52, EC70 cores . 10
Figure A.2 – Main dimensions of coil formers for EC90 core . 11
Figure B.1 – Pair of EC cores . 13

Table 1 – Principal dimensions of EC-cores . 8
Table 2 – Effective parameter and A values . 8
min
Table 3 – Main dimensions of coil formers for EC-cores . 9
Table A.1 – Main dimensions of coil formers (examples of Figure A.1 and A.2) for EC-
cores . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FERRITE CORES – DIMENSIONS –
Part 11: EC-cores for use in power supply applications

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62317-11 has been prepared by IEC technical committee 51:
Magnetic components and ferrite materials.
This first edition cancels and replaces the first edition of IEC 60647 published in 1979. This
edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the first
edition of IEC 60647:
a) addition of EC90 and EC120 cores in Table 1,
b) addition of effective parameter and A values and main dimensions of coil formers for
min
EC90 and EC120 cores.
– 4 – IEC 62317-11:2015 © IEC 2015

The text of this standard is based on the following documents:

CDV Report on voting
51/1077/CDV 51/1083/RVC
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.

A list of all parts in the IEC 62317 series, published under the general title Ferrite cores –
Dimensions, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
IEC 62317 consists of the following parts, under the general title Ferrite cores – Dimensions:

Part 1: General specification

Part 2: Pot-cores for use in telecommunications, power supply, and filter applications

Part 3: Dimensions of half pot-cores made of ferrite for inductive proximity switches

Part 4: RM-cores and associated parts

Part 5: EP-cores and associated parts for use in inductors and transformers

Part 6: ETD-cores for use in power supplies
Part 7: EER-cores
Part 8: E-cores
Part 9: Planar cores
Part 10: PM-cores made of magnetic oxides and associated parts – Dimensions
Part 11: EC-cores for use in power supply applications
Part 12: Dimensions of uncoated ring cores of magnetic oxides

—————————
Under consideration, currently available as IEC 62323.
Under consideration, currently available as IEC 61247.
Under consideration, currently available as IEC 61604.

– 6 – IEC 62317-11:2015 © IEC 2015

FERRITE CORES – DIMENSIONS –
Part 11: EC-cores for use in power supply applications

1 Scope
This part of IEC 62317 specifies the dimensions that are of importance for mechanical

interchangeability for a preferred range of EC-cores, the essential dimensions of coil formers
to be used with them, and the effective parameter values to be used in calculations involving
them.
The selection of core sizes for this standard is based on the philosophy of including those
sizes which are industrial standards, either by inclusion in national standards, or by broad-
based use in industry. See 62317-1 for more detail concerning the philosophy of selecting
core sizes to be included.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
Void.
3 Primary standards
3.1 General
Compliance with the following requirements ensures mechanical interchangeability of
complete assemblies and wound coil formers.
3.2 Dimensions of EC-cores
3.2.1 Principal dimensions
The principal dimensions of EC-cores shall be as given in Figure 1 and Table 1.

3.2.2 Effective parameter and A values
min
The effective parameter values of a pair of cores having the dimensions given in 3.2.1 are as
shown in Table 2.
A is specified in IEC 60205:2006, 2.2.
min
B C
s
r
r
D
IEC
Figure 1 – Principal dimensions of EC-cores

A
F
E
T
– 8 – IEC 62317-11:2015  IEC 2015

Table 1 – Principal dimensions of EC-cores
A B C D E F r s T
Size mm mm mm mm mm mm mm mm mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Max. Min. Max. Min. Max.
EC 35 33,7 35,3 17,15 17,45 9,2 9,8 11,9 12,6 22,2 23,3 9,2 9,8 0,5 2,5 3,0 27,7 29,3
EC 41 39,6 41,6 19,35 19,65 11,3 11,9 13,5 14,3 26,3 27,8 11,3 11,9 0,7 3,0 3,3 32,6 34,6
EC 52 50,9 53,5 24,05 24,35 13,05 13,75 15,5 16,3 32,1 33,9 13,05 13,75 0,8 3,5 4,0 42,7 45,3
EC 70 68,3 71,7 34,35 34,65 16,0 16,8 22,3 23,2 43,3 45,7 16,0 16,8 1,0 4,5 5,0 57,9 61,3
EC 90 88,2 91,8 44,35 45,65 29,0 31,0 35,0 36,0 68,5 71,5 29,0 31,0 1,0 5,2 5,8 77,2 80,8
EC 120 118,0 122,0 49,85 51,15 29,0 31,0 35,0 36,0 93,3 96,7 29,0 31,0 1,5 5,2 5,8 111,0 107,0

Table 2 – Effective parameter and A values
min
C C l A V A
1 2 e e e min
Size
-1 -3 2 3
mm mm mm mm mm mm
-3
EC 35 0,901 41 76,5 84,9 6 500 70,9
10,618 × 10
-3
EC 41 0,718 97 5,864 0 × 10 88,2 123 10 800 106
-3
EC 52 0,571 92 103 181 18 600 141
3,167 6 × 10
-3
EC 70 0,508 59 142 280 39 800 211
1,818 6 × 10
-3
EC 90 0,342 50 0,547 70 × 10 215 629 135 000 570
-3
EC 120 0,324 96  251 772 194 000 707
0,421 00 × 10
NOTE The manufacturers can indicate in their catalogues more precise values than those given in Table 2.

3.3 Main dimensions for coil formers

The main dimensions of coil formers suitable for use with a pair of EC-cores shall be as given

in Figure 2 and Table 3.
h
h
IEC
Figure 2 – Main dimensions of coil formers for EC-cores
Table 3 – Main dimensions of coil formers for EC-cores
d d d h h
1 2 3 1 2
Size
mm mm mm mm mm
Max. Max. Min. Max. Min.
EC 35 21,8 12,3 9,9 23,6 21,4
EC 41 25,8 14,4 12,0 26,8 24,4
EC 52 31,6 16,3 13,85 30,7 28,2
EC 70 42,7 19,6 17,0 44,3 41,3
EC 90 67,7 35,6 31,4 69,6 64,8
EC 120 92,4 35,6 31,4 69,6 64,8

d
d
d
– 10 – IEC 62317-11:2015 © IEC 2015

Annex A
(normative)
Example of standard coil formers

Examples of standard coil formers for EC35, EC41, EC52 and EC70 cores are shown in

Figure A.1 and for EC90 core are shown in Figure A.2 and in Table A.1.

H
C 2
D
D
H
H
G G G
IEC
Figure A.1 – Main dimensions of coil formers for EC35, EC41, EC52, EC70 cores

H
F
D
E
C
H
D
D
H
H
IEC
Figure A.2 – Main dimensions of coil formers for EC90 core

F
D
E
– 12 – IEC 62317-11:2015  IEC 2015

Table A.1 – Main
...