IEC 62317-2:2010

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

IEC 62317-2:2010 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of pot-cores made of ferrite, and the dimensional limits for coil formers to be used with 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 a national standard, or by broad-based use in industry. See IEC 62317-1 for more detail concerning the philosophy of selecting core sizes to be included. This first edition cancels and replaces the fourth edition of IEC 60133 published in 2000. The main changes with respect to the previous edition of IEC 60133 are listed below:
- changed "e dimension" of P4,6/3,1 in Table 6 from 3,20 Max. to 3,40 Max.;
- removed "derived standards" from Annex B (informative) in the fourth edition of IEC 60133;
- changed the name of core parts in Subclause 3.1.2 from "Grooves" to "Wire-ways" in accordance with IEC 62317-1 Subclause 5.6.

Noyaux ferrites - Dimensions - Partie 2: Circuits magnétiques en pots utilisés dans des applications de télécommunications, d'alimentation électrique et de filtre

La CEI 62317-2:2010 spécifie les dimensions qui présentent une importance pour l'interchangeabilité mécanique d'une gamme préférentielle de circuits magnétiques en pots réalisés en oxydes magnétiques, ainsi que les limites dimensionnelles pour des carcasses à utiliser avec ces pots. Le choix des tailles des noyaux pour la présente norme est fondé sur la philosophie consistant à introduire les tailles qui correspondent à des normes industrielles, soit par une prise en compte dans une norme nationale, soit par le biais d'une utilisation à grande échelle dans l'industrie. Voir la CEI 62317-1 pour plus de détails concernant ce principe de choix des tailles de noyaux à inclure. La présente édition annule et remplace la quatrième édition de la CEI 60133 publiée en 2000. Les principales modifications par rapport à la précédente édition de la CEI 60133 sont énumérées ci-dessous:
- au Tableau 6, changer la dimension "e" du P4,6/3,1 de 3,20 Max. à 3,40 Max.;
- enlever l'Annexe B (informative) "Normes dérivées" dans l'édition quatre de la CEI 60133;
- dans la Paragraphe 3.1.2 du texte anglais, changer "Grooves" en "Wire-ways" conformément à la Paragraphe 5.6 de la CEI 62317-1.

General Information

• Status: Replaced
• Publication Date: 23-Jun-2010
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: MT 1 - TC 51/MT 1
• Current Stage: DELPUB - Deleted Publication
• Start Date: 22-Feb-2019
• Completion Date: 27-Mar-2020

Relations

• Replaced By: IEC 63093-2:2020 - Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 2: Pot-cores for use in telecommunications, power supply, and filter applications
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62317-2


®

Edition 1.0 2010-06



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


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

Noyaux ferrites – Dimensions –
Partie 2: Circuits magnétiques en pots utilisés dans des applications de
télécommunications, d’alimentation électrique et de filtre


IEC 62317-2:2010

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62317-2


®

Edition 1.0 2010-06



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


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

Noyaux ferrites – Dimensions –
Partie 2: Circuits magnétiques en pots utilisés dans des applications de
télécommunications, d’alimentation électrique et de filtre


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.100.10 ISBN 978-2-88912-005-5
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – 62317-2 © IEC:2010



CONTENTS

FOREWORD.3


1 Scope.5

2 Normative references .5

3 Primary standards .5


3.1 Dimensions of pot-cores.5

3.1.1 Principal dimensions.5

3.1.2 Wire-ways .7

3.1.3 Effective parameter values .8
3.2 Main dimensions for coil formers .9
Annex A (informative) Pot-core design.11
Annex B (informative) Example of a standard for gauges to check the dimensions of
pot-cores meeting the IEC primary standard .12

Figure 1 – Principal dimensions of pot-cores without back-wall slots.6
Figure 2 – Principal dimensions of pot-cores with back-wall slots.7
Figure 3 – Main dimensions of coil formers for pot-cores .9
Figure B.1 – Dimensions of gauge A .12
Figure B.2 – Dimensions of gauges B and C .13

Table 1 – Principal dimensions of pot-cores.6
Table 2 – Limits for dimensions C and G .7
Table 3 – Minimum wire-way depth .8
Table 4 – Effective parameter values pot-cores with a centre hole .8
Table 5 – Effective parameter values pot-cores without a centre hole .9
Table 6 – Main dimensions of coil formers for pot-cores.10
Table A.1 – Ratio of diameter to height .11
Table B.1 – Dimensions of gauge A .12
Table B.2 – Dimensions of gauges B and C .13

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62317-2 © IEC:2010 – 3 –


INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________



FERRITE CORES –

DIMENSIONS –



Part 2: Pot-cores for use in telecommunications,

power supply, and filter applications





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
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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 the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62317-2 has been prepared by technical committee 51: Magnetic
components and ferrite materials.
According to IEC 62317-1 clause 3-b) and Table A.1 in Annex A, the publication number of
IEC 60133 should be updated to IEC 62317-2 at the time of new revision of this standard.
This first edition cancels and replaces the fourth edition of IEC 60133 published in 2000.
This International Standard constitutes a technical revision of IEC 60133.
The main changes with respect to the previous edition of IEC 60133 are listed below:
– changed “e dimension” of P4,6/3,1 in Table 6 from 3,20 Max. to 3,40 Max.;
– removed “derived standards” from Annex B (informative) in the fourth edition of IEC 60133;

---------------------- Page: 5 ----------------------
– 4 – 62317-2 © IEC:2010


– changed the name of core parts in Subclause 3.1.2 from “Grooves” to “Wire-ways” in

accordance with IEC 62317-1 Subclause 5.6.


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


FDIS Report on voting

51/980/FDIS 51/982/RVD



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 of the IEC 62317 series, 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 web site 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.

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62317-2 © IEC:2010 – 5 –


FERRITE CORES –

DIMENSIONS –



Part 2: Pot-cores for use in telecommunications,

power supply, and filter applications








1 Scope

This part of IEC 62317 specifies the dimensions that are of importance for mechanical
interchangeability for a preferred range of pot-cores made of ferrite, and the dimensional
limits for coil formers to be used with 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 a national standard, or by broad-
based use in industry. See IEC 62317-1 for more detail concerning the philosophy of selecting
core sizes to be included.
The general considerations upon which the design of this range of cores is based are given in
Annex A.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60205, Calculation of the effective parameters of magnetic piece parts
IEC 62317-1, Ferrite cores – Dimensions – Part 1: General specification
3 Primary standards
3.1 Dimensions of pot-cores
Compliance with the following requirements ensures mechanical interchangeability of
complete assemblies and wound coil formers.

3.1.1 Principal dimensions
The principal dimensions of pot-cores shall be as given in Table 1, Figure 1 and Figure 2.

---------------------- Page: 7 ----------------------
– 6 – 62317-2 © IEC:2010


Table 1 – Principal dimensions of pot-cores

Dimensions in millimetres


a
A E F H 2B 2D r
1
Size Figures
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Max.

P3,3/2,6 3,18 3,30 2,50 2,60 1,30 1,40 – – 2,50 2,60 1,70 1,90 0,20 1

P4,6/3,1 4,40 4,60 3,50 3,65 1,90 2,00 – – 3,00 3,10 2,10 2,30 0,20 1

P5,8/3,3 5,65 5,80 4,50 4,60 2,40 2,50 0,95 1,05 3,20 3,30 2,20 2,40 0,20 1

P7,4/4,0 7,15 7,35 5,80 5,95 2,95 3,00 1,05 1,15 4,10 4,20 2,80 3,00 0,20 1
P9/5 9,00 9,30 7,50 7,75 3,70 3,90 2,00 2,20 5,10 5,40 3,60 3,90 0,25 2
P11/7 10,9 11,3 9,00 9,40 4,50 4,70 2,00 2,20 6,30 6,60 4,40 4,70 0,25 2
P14/8 13,8 14,3 11,6 12,0 5,80 6,00 3,00 3,20 8,20 8,50 5,60 6,00 0,25 2
P18/11 17,6 18,4 14,9 15,4 7,30 7,60 3,00 3,20 10,4 10,7 7,20 7,60 0,25 2
P22/13 21,2 22,0 17,9 18,5 9,10 9,40 4,40 4,70 13,2 13,6 9,20 9,60 0,35 2
P26/16 25,0 26,0 21,2 22,0 11,1 11,5 5,40 5,70 15,9 16,3 11,0 11,4 0,35 2
P30/19 29,5 30,5 25,0 25,8 13,1 13,5 5,40 5,70 18,6 19,0 13,0 13,4 0,35 2
P36/22 35,0 36,2 29,9 30,9 15,6 16,2 5,40 5,70 21,4 22,0 14,6 15,0 0,35 2
NOTE P3,3/2,6 and P4,6/3,1 cores are without the centre hole shown in Figure 1.
a
 Sharp inner corners of pot-cores are preferable but in practice some rounding may occur, provided that radius
r is not exceeded.
1

2B
2D
X
r
1

Section X-X
X
IEC  1378/10

Figure 1 – Principal dimensions of pot-cores without back-wall slots
G
H
f
F
E
A

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62317-2 © IEC:2010 – 7 –




C 2B

2D
X








r
1
X Section X-X
IEC  1379/10

Figure 2 – Principal dimensions of pot-cores with back-wall slots
NOTE The dimensions of the cores may be checked by means of gauges. By way of example, a possible standard
for these gauges is given in Annex B. In order to facilitate production it may be necessary to use gauges having
dimensions differing from those given in Annex B, although no relaxation of the requirements for the dimensions of
the cores given in Table 1 and in Table 2 is permitted.
Table 2 – Limits for dimensions C and G
Dimensions in millimetres
Cores with back-wall slots
Size
C G
Min. Max. Min. Max.
P3,3/2,6 – – 0,8 1,3
P4,6/3,1 – – 1,1 1,7
P5,8/3,3 – – 1,4 2,0
P7,4/4,0 – – 1,6 2,2
P9/5  6,0  7,5 1,6 2,4
P11/7  6,5  8,0 1,8 2,6
P14/8  8,7 10,0 2,3 4,1

P18/11 11,3 14,0 2,7 4,4
P22/13 13,3 16,5 3,0 4,4
P26/16 17,0 20,0 3,0 4,4
P30/19 20,0 23,0 3,5 5,3
P36/22 24,0 27,2 4,0 5,6
NOTE 1 The shape of the slots is not defined, but the width G is indicated in the table.
NOTE 2 It is recommended that any tightening of the tolerance on dimensions C should be towards the
minimum value and on dimension G towards the maximum value.

3.1.2 Wire-ways
Wire-ways are recesses in the floor of the pot-core, corresponding to the back-wall slots,
which allow a path for wire leads from the centre of the coil to the outside. When wire-ways
are provided, their minimum depth shall be as given in Table 3.
G
H
F
E
A

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– 8 – 62317-2 © IEC:2010


Table 3 – Minimum wire-way depth


Dimensions in millimetres


Size Wire-way depth

P14/8 0,2

P18/11 0,3


P22/13 0,4

P26/16 0,5

P30/19 0,6

P36/22 0,6

3.1.3 Effective parameter values
The effective parameter values for pot-cores whose dimensions comply with 3.1.1 shall be as
given in Table 4 and Table 5 (for the definitions of these parameters, and their calculation,
see IEC 60205).
Table 4 – Effective parameter values pot-cores with a centre hole
C C A l V A

1 2 e e e min
Size
–1 –3 –3 2 3 2
mm 10 mm mm mm mm mm
P5,8/3,3 1,632 6 345,47 4,73 7,72 36,5 3,66
P7,4/4,0 1,358 8 186,79 7,27 9,88 71,9 5,79
P9/5 1,203 2 118,12 10,2 12,3 125 7,88
P11/7 0,933 53 56,727 16,5 15,4 253 13,2
P14/8 0,757 42 29,521 25,7 19,4 499 19,8
P18/11 0,573 83 12,863 44,6 25,6 1 140 36,0
P22/13 0,480 78 7,418 5 64,8 31,2 2 020 50,9
P26/16 0,389 23 4,060 5 95,9 37,3 3 580 76,1
P30/19 0,323 43 2,332 1 139 44,9 6 220 115
P36/22 0,256 66 1,249 2 205 52,7 10 800 172

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62317-2 © IEC:2010 – 9 –


Table 5 – Effective parameter values pot-cores without a centre hole

C C A l V A


1 2 e e e min
Size
–1 –3 –3 2 3 2
 mm 10 mm mm mm mm mm

P3,3/2,6 3,136 7 1 768,4 1,77 5,56 9,87 1,43

P4,6/3,1 2,088 7 609,06 3,43 7,16 24,6 2,60

P5,8/3,3 1,540 6 295,89 5,21 8,02 41,8 3,66

P7,4/4,0 1,294 1 163,38 7,92 10,3 81,2 5,79

P9/5 1,063 9 84,640 12,6 13,4 168 8,95

P11/7 0,865 00 46,165 18,7 16,2 304 13,2
P14/8 0,680 99 22,061 30,9 21,0 649 23,6
P18/11 0,540 12 10,923 49,4 26,6 1 320 36,0
P22/13 0,438 12 5,773 5 75,9 33,2 2 520 58,1
P26/16 0,355 34 3,183 1 112 39,7 4 430 87,0
P30/19 0,304 43 1,988 8 153 46,6 7 130 117
P36/22 0,246 93 1,128 5 219 54,0 11 800 172

3.2 Main dimensions for coil formers
Main dimensions for coil formers shall be in accordance with Figure 3 and Table 6.
NOTE The dimensions of Table 6 which correspond to similar dimensions in Table 1 are labelled with the same
letter in upper case, for example, 2d corresponds to 2D in Table 1.

f
e
IEC  1380/10


Figure 3 – Main dimensions of coil formers for pot-cores
2d

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– 10 – 62317-2 © IEC:2010


Table 6 – Main dimensions of coil formers for pot-cores

Dimensions in millimetres


Main dimensions for coil formers

Size
  e  f 2d

Max. Min. Max.

P3,3/2,6 2,40 1,50 1,60

P4,6/3,1 3,40 2,10 2,00

P5,8/3,3 4,40 2,60 2,10

P7,4/4,0 5,70 3,10 2,70
P9/5 7,40 4,00 3,50
P11/7 8,90 4,80 4,30
P14/8 11,5 6,10 5,50
P18/11 14,8 7,70 7,10
P22/13 17,8 9,50 9,10
P26/16 21,1 11,6 10,9
P30/19 24,9 13,6 12,9
P36/22 29,8 16,3 14,5

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62317-2 © IEC:2010 – 11 –


Annex A

(informative)



Pot-core design




The pot-cores covered by this standard were originally designed for optimum dimensions

based upon minimum loss R /L. Before optimizing for performance, the following hole
dc

diameter ranges were chosen:

– 0,95 mm to 1,05 mm for P5,8/3,3

– 1,05 mm to 1,15 mm for P7,4/4,0
– 2,0 mm to 2,2 mm for P9/5, P11/7
– 3,0 mm to 3,2 mm for P14/8, P18/11
– 4,4 mm to 4,7 mm for P22/13
– 5,4 mm to 5,7 mm for P26/16, P30/19, P36/22
Originally a pot-core 14 mm × 8 mm, with an adjusting device of 3 mm diameter was the
smallest that could be produced in quantity.
Due to miniaturization of electronic devices, four smaller pot-cores, P7,4/4,0, P5,8/3,3,
P4,6/3,1 and P3,3/2,6 were added as standard pot-cores, and the larger pot-core P42/29 was
deleted.
The ratio of diameter to height of the pot-core, calculated on the above assumption, is fairly
constant, as appears from the list below, where A/2B lies between 1,48 and 1,76, except for
the smallest type.
Table A.1 – Ratio of diameter to height
Size A 2B A/2B
(nom.) (nom.)
P3,3/2,6 3,24 2,55 1,27
P4,6/3,1 4,50 3,05 1,48
P5,8/3,3 5,73 3,25 1,76
P7,4/4,0 7,25 4,15 1,75
P9/5 9,15 5,25 1,74
P11/7 11,1 6,50 1,71

P14/8 14,05 8,35 1,68
P18/11 18,0 10,55 1,71
P22/13 21,6 13,4 1,61
P26/16 25,5 16,15 1,58
P30/19 30,0 18,8 1,60
P36/22 35,6 21,7 1,64

The steps in the series are such that the ratio of R /L of two adjacent pot-cores is about 1,6.
dc

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– 12 – 62317-2 © IEC:2010


Annex B

(informative)



Example of a standard for gauges to check the dimensions

of pot-cores meeting the IEC primary standard




B.1 General


The gauges shall be in accordance with Table B.1 and Table B.2 and their associated figures.


r r
1 1
r r
1 1
2d
IEC  1381/10

Figure B.1 – Dimensions of gauge A
Table B.1 – Dimensions of gauge A
Dimensions in millimetres
e  f 2d r
1
Size
Max. Min. Lim. Max. Min. Lim. Max. Min. Lim. Max. Min.
P3,3/2,6  2,495  2,480  2,460  1,417  1,405  1,435  1,695  1,683  1,665 0,35 0,25
P4,6/3,1  3,495  3,480  3,460  2,017  2,005  2,035  2,095  2,083  2,065 0,35 0,25

P5,8/3,3  4,495  4,480  4,460  2,517  2,505  2,535  2,195  2,183  2,169 0,35 0,25
P7,4/4,0  5,795  5,780  5,760  3,017  3,005  3,035  2,795  2,783  2,765 0,35 0,25
P9/5  7,495  7,480  7,459  3,917  3,905  3,935  3,595  3,583  3,565 0,35 0,25
P11/7  8,995  8,980  8,959  4,717  4,705  4,735  4,395  4,383  4,365 0,35 0,25
P14/8 11,595 11,577 11,544  6,017  6,005  6,035  5,595  5,583  5,565 0,35 0,25
P18/11 14,895 14,877 14,854  7,620  7,605  7,640  7,195  7,180  7,160 0,35 0,25
P22/13 17,895 17,877 17,854  9,420  9,405  9,440  9,195  9,180  9,160 0,45 0,35
P26/16 21,195 21,174 21,149 11,523 11,505 11,546 10,995 10,977 10,954 0,45 0,35
P30/19 24,995 24,974 24,949 13,523 13,505 13,546 12,995 12,977 12,954 0,45 0,35
P36/22 29,895 29,874 29,849 16,223 16,205 16,246 14,595 14,577 14,554 0,45 0,35

e
f

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62317-2 © IEC:2010 – 13 –




Gauge B “Go”




l



Gauge C “No go”


l
IEC  1382/10

Figure B.2 – Dimensions of gauges B and C
B.2 Procedure and requirements
A pair of pot-core halves is placed around the appropriate gauge A (see Figure B.1). For
cores with a centre hole, gauge B is inserted with gauge A still in position. These two core
halves, when pressed together without forcing, shall meet at the outer ring without an air gap.
Gauge C (see Figure B.2) shall not pass through the centre hole of either pot-core half.
Table B.2 – Dimensions of gauges B and C
Dimensions in millimetres
l H H
min max
Size
Max. Min. Max. Min. Lim. Max. Min.
P3,3/2,6 - - - - - - -
P4,6/3,1 - - - - - - -
P5,8/3,3 20,5 19,5 0,945 0,936 0,921 1,064 1,055
P7,4/4,0 20,5 19,5 1,045 1,036 1,021 1,164 1,155
P9/5 20,5 19,5 1,995 1,986 1,971 2,214 2,205
P11/7 20,5 19,5 1,995 1,986 1,971 2,214 2,205

P14/8 20,5 19,5 2,995 2,985 2,971 3,214 3,205
P18/11 20,5 19,5 2,995 2,985 2,971 3,214 3,205
P22/13 20,5 19,5 4,395 4,383 4,365 4,717 4,705
P26/16 30,5 29,5 5,395 5,383 5,365 5,717 5,705
P30/19 30,5 29,5 5,395 5,383 5,365 5,717 5,705
P36/22 30,5 29,5 5,395 5,383 5,365 5,717 5,705
NOTE The dimensions indicated as “Min.” and “Max.” give the manufacturing tolerance; and that indicated as
“Lim.” gives the wear limit permissible for the gauge.

______________
H
H min
max

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– 14 – 62317-2 © CEI:2010



SOMMAIRE

AVANT-PROPOS.15


1 Domaine d'application .17

2 Références normatives.17

3 Normes principales.17


3.1 Dimensions des circuits magnétiques en pots.17

3.1.1 Dimensions principales.17

3.1.2 Chemins de câbles .20

3.1.3 Valeurs des paramètres effectifs .20
3.2 Dimensions principales pour les corps de bobines.21
Annexe A (informative) Conception des circuits magnétiques en pots .23
Annexe B (informative) Exemple de norme relative aux calibres en vue de vérifier les
dimensions des circuits magnétiques en pots répondant à la norme CEI principale.24

Figure 1 – Dimensions principales des circuits magnétiques en pots sans encoches sur
la paroi arrière .18
Figure 2 – Dimensions principales des circuits magnétiques en pots avec encoches sur
la paroi arrière .19
Figure 3 – Dimensions principales des corps de bobine pour les circuits magnétique en
pots .22
Figure B.1 – Dimensions du calibre A .24
Figure B.2 – Dimensions des calibres B et C .25

Tableau 1 – Dimensions principales des circuits magnétiques en pots.18
Tableau 2 – Limites des dimensions C et G .20
Tableau 3 – Profondeur minimale des chemins de câbles .20
Tableau 4 – Valeurs des paramètres effectifs des circuits magnétiques en pot
comportant un trou central .21
Tableau 5 – Valeurs des paramètres effectifs des circuits magnétiques en pot sans
trou central .21
Tableau 6 – Dimensions principales des corps de bobine pour les circuits magnétiques
22
en pot .
Tableau A.1 – Rapport entre le diamètre et la hauteur .23

Tableau B.1 – Dimensions du calibre A.
...