IEC 62317-13:2015

IEC 62317-13 ®
Edition 2.0 2015-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 13: PQ-cores for use in power supply applications

Noyaux ferrites – Dimensions –
Partie 13: Noyaux PQ utilisés dans des applications d’alimentation électrique

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IEC 62317-13 ®
Edition 2.0 2015-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Dimensions –
Part 13: PQ-cores for use in power supply applications

Noyaux ferrites – Dimensions –

Partie 13: Noyaux PQ utilisés dans des applications d’alimentation électrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-2862-3

– 2 – IEC 62317-13:2015 © IEC 2015

CONTENTS
FOREWORD . 3

1 Scope . 5

2 Normative references . 5

3 Primary standards . 5

3.1 General . 5

3.2 Dimensions of PQ-cores . 5

3.2.1 Principal dimensions . 5

3.2.2 Effective parameter and A values . 5
min
3.3 Dimensions limits for coil formers. 6
3.4 Pin locations and base outlines . 6
3.5 Pin diameter . 6
4 Mounting . 6
Annex A (informative) PQ-core design . 12
Annex B (informative) An example of gauge to check the dimensions of PQ-cores . 13
B.1 General . 13
B.2 Procedure and requirements . 13
Bibliography . 14

Figure 1 – Dimensions of PQ-cores . 6
Figure 2 – Dimensions of low-profile PQI-cores . 8
Figure 3 – Main dimensions of coil formers for PQ-cores . 10
Figure 4 – Pin locations and base outlines viewed from the upper side of the board . 11
Figure B.1 – Gauge dimensions . 13

Table 1 – Dimensions of PQ-cores . 7
Table 2 – Dimensions of low-profile PQI-cores . 8
Table 3 – Effective parameter and A values for PQ-cores . 9
min
Table 4 – Effective parameter and A values for low-profile PQI-cores . 9
min
Table 5 – Main dimensions of coil formers for PQ-cores. 10
Table B.1 – Gauge dimensions . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
FERRITE CORES – DIMENSIONS –
Part 13: PQ-cores for use in power supply applications

FOREWORD
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International Standard IEC 62317-13 has been prepared by technical committee 51: Magnetic
components and ferrite materials.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of three core sizes (PQ 65/54, PQ 78/39 and PQ 107/87) in Table 1,
b) addition of effective parameter and A values, of main dimensions of coil formers and of
min
gauge dimensions for PQ-cores for PQ 65/54, PQ 78/39 and PQ 107/87.

– 4 – IEC 62317-13:2015 © IEC 2015

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

FDIS Report on voting
51/1095/FDIS 51/1104/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.
FERRITE CORES – DIMENSIONS –
Part 13: PQ-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 PQ-cores and low-profile PQI-cores made of ferrite,
and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base
outlines of the cores.
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.
NOTE See IEC 62317-1 for more detail concerning the philosophy of selecting core sizes to be included.
The general considerations that the design of this range of cores is based upon are given in
Annex A.
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 PQ-cores
3.2.1 Principal dimensions
The principal dimensions of PQ-cores shall be as given in Table 1 and those of the low-profile
PQ-cores shall be as given in Table 2. See also Figure 1 and Figure 2.
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, although no relaxation of the
requirements for the dimensions of the cores given in Table 1 and in Table 2 is permitted.
3.2.2 Effective parameter and A values
min
The effective parameter values for cores having the dimensions given in 3.2.1 are as shown in
Table 3 and Table 4.
– 6 – IEC 62317-13:2015 © IEC 2015

3.3 Dimensions limits for coil formers

The essential dimensions of coil formers suitable for use with a pair of PQ-cores shall be as

given in Table 5. See also Figure 3.

3.4 Pin locations and base outlines

These shall be as shown in Figure 4.

3.5 Pin diameter
Coil former terminations (pins) shall be accepted by a gauge having 1,2 mm holes on a true

position.
4 Mounting
Due to their sizes and respective weights, it is recommended that the cores above PQ 35/35
(including PQ 35/35) be fixed on the printed board with mounting assemblies at two opposite
sides of their coil formers.
Concerning low-profile PQ-cores, no mounting assemblies are defined. It is recommended
that the two cores be fixed by glue or adhesive tape.
C
L B
D
X
X
IEC
Figure 1 – Dimensions of PQ-cores
A
J
F
G
E
Table 1 – Dimensions of PQ-cores

A B C D E F G J L
Size
mm mm mm mm mm mm mm mm mm
Min. 20,10 8,00 13,60 5,.00 17,60 8,60 12,00

PQ 20/16 Nom.    4,80 10,50

Max. 20,90 8,20 14,40 5,30 18,40 9,00 13,00

Min. 20,10 10,00 13,60 7,00 17,60 8,60 12,00

PQ 20/20 Nom.    4,80 10,50

Max. 20,90 10,20 14,40 7,30 18,40 9,00 13,00
Min. 26,05 9,95 18,55 5,60 22,05 11,80 15,50
PQ 26/20 Nom.    7,30 13,90
Max. 26,95 10,20 19,45 5,90 22,95 12,20 16,50
Min. 26,05 12,25 18,55 7,90 22,05 11,80 15,50
PQ 26/25 Nom.    7,30 13,90
Max. 26,95 12,50 19,45 8,20 22,95 12,20 16,50
Min. 31,50 10,15 21,50 5,60 27,00 13,20 19,00
PQ 32/20 Nom.    6,20 15,10
Max. 32,50 10,40 22,50 5,90 28,00 13,70 20,00
Min. 31,50 15,05 21,50 10,50 27,00 13,20 19,00
PQ 32/30 Nom.    6,20 15,10
Max. 32,50 15,30 22,50 10,80 28,00 13,70 20,00
Min. 34,50 17,25 25,50 12,35 31,50 14,10 23,50
PQ 35/35 Nom.    7,30 16,40
Max. 35,70 17,50 26,50 12,65 32,50 14,60 24,50
Min. 39,70 19,75 27,40 14,60 36,40 14,60 28,00
PQ 40/40 Nom.    7,75 16,80
Max. 41,30 20,00 28,60 14,90 37,60 15,20 29,00
Min. 49,00 24,85 31,50 17,90 43,30 19,65 31,50
PQ 50/50 Nom.    10,00 22,00
Max. 51,00 25,10 32,50 18,20 44,70 20,35 32,50
Min. 63,70 26,80 39,20 17,75 52,00 25,55 39,20
PQ 65/54 Nom.    12,00 27,50

Max. 66,30 27,20 40,80 18,25 54,00 26,45 40,80
Min. 77,00 19,45 41,20 12,60 69,10 25,00 60,10
PQ 78/39 Nom.    13,60 27,60
Max. 80,00 19,95 42,80 13,20 71,90 26,00 62,50
Min. 105,00 43,10 68,50 27,50 93,70 40,20 72,50
PQ 107/87 Nom.    22,80 43,70
Max. 109,00 43,90 71,50 28,50 97,30 41,80 75,30

– 8 – IEC 62317-13:2015 © IEC 2015

C
B
L
B
C
D
X
X
IEC
Figure 2 – Dimensions of low-profile PQI-cores
Table 2 – Dimensions of low-profile PQI-cores
A B B C D E F G J L
1 2
Size
mm mm mm mm mm mm mm mm mm mm
Min. 16,10 5,30 2,25 10,90 2,90 14,10 6,80 9,60
PQI 16/7,8 Nom.     3,90 8,40
Max. 16,70 5,50 2,45 11,50 3,20 14,70 7,20 10,40
Min. 20,10 5,90 2,85 13,60 2,90 17,60 8,60 12,00
PQI 20/9 Nom.     4,80 10,50
Max. 20,90 6,10 3,05 14,40 3,20 18,40 9,00 12,50
Min. 26,05 7,20 4,10 18,55 2,95 22,05 11,80 15,50
PQI 26/12 Nom.     7,30 13,90
Max. 26,95 7,40 4,30 19,45 3,25 22,95 12,20 16,50

A
J
F
G
E
A
Table 3 – Effective parameter and A values for PQ-cores
min
a
－3
C A l V A
C × 10
1 e e e min
Size
－1 －3 2 3 2
mm mm mm mm mm mm
PQ 20/16 0,580 53 9,034 6 64,3 37,3 2 400 59,3

PQ 20/20 0,709 95 11,129 63,8 45,3 2 890 59,3

PQ 26/20 0,361 41 2,932 5 123 44,5 5 490 113

PQ 26/25 0,437 83 3,569 9 123 53,7 6 590 113

PQ 32/20 0,313 14 2,001 2 156 49,0 7 670 142

PQ 32/30 0,440 40 2,833 3 155 68,5 10 600 142
PQ 35/35 0,465 38 2,718 8 171 79,7 13 600 161
PQ 40/40 0,491 97 2,602 7 189 93,0 17 600 174
PQ 50/50 0,342 34 1,032 6 332 113 37 600 314
PQ 65/54 0,209 36 0,355 40 589 123 72 700 531
PQ 78/39 0,256 49 0,577 90 444 114 50 500 386
PQ 107/87 0,141 35 0,098 530 1 430 203 291 000 1 320
a
See 2.2 of IEC 60205:2006.
Table 4 – Effective parameter and A values for low-profile PQI-cores
min
－3 a
C C × 10 A l V A
1 2 e e e min
Size
－1 －3 2 3 2
mm mm mm mm mm mm
PQI 16/7,8 0,466 78 11,185 41,7 19,5 814 37,4
PQI 20/9 0,345 95 5,238 7 66,0 22,8 1 510 59,3
PQI 26/12 0,224 03 1,814 3 123 27,7 3 420 110
a
See 2.2 of IEC 60205:2006.
– 10 – IEC 62317-13:2015 © IEC 2015

H
H
h 2
b
IEC
Figure 3 – Main dimensions of coil formers for PQ-cores
Table 5 – Main dimensions of coil formers for PQ-cores
D D D H H a b h
1 2 3 1 2
Size mm mm mm mm mm mm mm mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Max. Max. Min.
PQ 20/16 17,05 17,45 10,85 11,05 9,05 9,25 9,60 9,95 8,55 9,20 23,35 23,35 6,1
PQ 20/20 17,05 17,45 10,85 11,05 9,05 9,25 13,60 13,95 12,55 13,20 23,35 23,35 6,1
PQ 26/20 21,35 21,85 14,15 14,45 12,25 12,55 10,80 11,15 9,75 10,40 26,95 29,65 6,1
PQ 26/25 21,35 21,85 14,15 14,45 12,25 12,55 15,40 15,75 14,35 15,00 26,95 29,65 6,1
PQ 32/20 26,35 26,85 15,85 16,15 13,85 14,15 10,80 11,15 9,65 10,30 32,35 34,35 6,6
PQ 32/30 26,35 26,85 15,85 16,15 13,85 14,15 20,35 20,95 19,20 20,10 32,35 34,35 6,6

PQ 35/35 30,85 31,35 16,65 17,05 14,75 15,05 24,05 24,60 22,90 23,95 35,55 39,45 7,1
PQ 40/40 35,75 36,25 17,35 17,65 15,45 15,75 28,55 29,05 27,40 28,20 41,30 42,45 6,1
PQ 50/50 42,65 43,15 22,95 23,45 20,55 21,05 34,75 35,25 33,50 34,30 51,00 51,25 9,6
PQ 65/54 51,35 51,85 29,05 29,55 26,65 27,15 34,45 34,95 33,20 34,00 – – –
PQ 78/39 68,45 68,95 28,60 29,10 26,20 26,70 24,15 24,65 22,90 23,70 – – –
PQ 107/87 93,05 93,55 44,40 44,90 42,00 42,50 53,95 54,45 52,70 53,50 – – –

D
D
a
D
PQ 20/16
PQ 26/20
PQ 32/20
PQ 20/20
PQ 26/25
PQ 32/30
PQ 35/35
PQ 40/40
2,54 mm grids
PQ 50/50
IEC
Figure 4 – Pin locations and base outlines viewed from the upper side of the board

– 12 – IEC 62317-13:2015 © IEC 2015

Annex A
(informative)
PQ-core design
The design of PQ-cores standardized by the IEC is based on the following considerations:

a) minimize the design “q” (l IA × l IA ) with a uniform cross-section area of each magnetic
e e w w
path,
where
l  is the average length of turns;
w
A  is the available winding cross-section.
w
One useful way to consider ferrite core design is by evaluating the design factor “q”.
Minimize the “q” results in the highest inductance and lowest copper losses in the
transformer or inductor. PQ-core dimensions in this document are based on this type of
design philosophy;
b) get more transmission power from the tran
...