IEC TR 63090:2017

IEC TR 63090 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
Dimensional tolerances of ferrite cores
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IEC TR 63090 ®
Edition 1.0 2017-05
TECHNICAL
REPORT
colour
inside
Dimensional tolerances of ferrite cores

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-4349-7

－ 2 － IEC TR 63090:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Summary of dimensional tolerances of ferrite cores . 7
4.1 General . 7
4.2 Dimensional tolerances of E-cores . 7
4.3 Dimensional tolerances of ring cores . 9
4.4 Dimensional tolerances of ETD/EER-cores . 11
4.5 Dimensional tolerances of planar ER-cores . 13
5 Conclusion . 15
Annex A (informative) Data of dimensional tolerances . 16
A.1 E-core . 16
A.2 Ring core . 34
A.3 ETD/EER-core . 43
A.4 Planar ER-core . 49
Bibliography . 55

Figure 1 – Cause-and-effect diagram of variations in dimension . 6
Figure 2 – E-core . 7
Figure 3 – Dimensional tolerances of each part of E-cores . 9
Figure 4 – Ring core . 10
Figure 5 – Dimensional tolerances of each part of ring cores . 11
Figure 6 – ETD/EER-core . 11
Figure 7 – Dimensional tolerances of each part of ETD/EER-cores . 13
Figure 8 – Planar ER-core . 14
Figure 9 – Dimensional tolerances of each part of planar ER-cores . 15

Table 1 – IEC standards of ferrite core dimensions . 5
Table 2 – Dimensional tolerances recommended for a new design of E-cores . 8
Table 3 – Dimensional tolerances recommended for a new design of ring cores . 10
Table 4 – Dimensional tolerances recommended for a new design of ETD/EER-cores . 12
Table 5 – Dimensional tolerances recommended for a new design of planar ER-cores . 14
Table A.1 – Dimensional tolerances of each part (E-core) . 16
Table A.2 – Dimensional tolerances of each part (Ring-core) . 34
Table A.3 – Dimensional tolerances of each part (ETD/EER-core) . 43
Table A.4 – Dimensional tolerances of each part (Planar ER-core) . 49

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIMENSIONAL TOLERANCES OF FERRITE CORES

FOREWORD
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example "state of the art".
IEC TR 63090, which is a Technical Report, has been prepared by IEC technical committee
51: Magnetic components, ferrite and magnetic powder materials.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
51/1166/DTR 51/1186/RVDTR
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

－ 4 － IEC TR 63090:2017 © IEC 2017
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
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• amended.
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INTRODUCTION
This document shows the dimensional tolerances of ferrite cores that are generally used by
ferrite core suppliers. As a reference, this is useful for ferrite core suppliers and users when
they design ferrite cores and/or the components which use the ferrite cores.
IEC has published international standards regarding ferrite core dimensions and their
tolerances, as listed in the Table 1, and core sizes in each core shape were chosen from
industrial standards from Europe, Japan and USA. However, there are some cases that lack
unity in the dimensional tolerances even if ferrite core dimensions are close.
Because many new sizes are still designed for the E, ETD/EER, planar ER and ring core, this
document gives information about the dimensional tolerances for reference dimensions of
each core shape.
Table 1 – IEC standards of ferrite core dimensions
IEC standard Current standard
IEC 62317-1, Ferrite cores – Dimensions – Part 1: General specification ///
IEC 62317-2, Ferrite cores – Dimensions – Part 2: Pot-cores for use in ///
telecommunications, power supply, and filter applications
IEC 62317-3, Ferrite cores – Dimensions – Part 3: Half-pot cores (future standard) IEC 62323
IEC 62317-4, Ferrite cores – Dimensions – Part 4: RM-cores and associated parts ///
IEC 62317-5, Ferrite cores – Dimensions – Part 5: EP-cores and associated parts for use ///
in inductors and transformers
IEC 62317-6, Ferrite cores – Dimensions – Part 6: ETD-cores for use in power supplies ///
IEC 62317-7, Ferrite cores – Dimensions – Part 7: EER-cores ///
IEC 62317-8, Ferrite cores – Dimensions – Part 8: E-cores ///
IEC 62317-9, Ferrite cores – Dimensions – Part 9: Planar cores ///
IEC 62317-10, Ferrite cores – Dimensions – Part 10: PM cores (future standard) IEC 61247
IEC 62317-11, Ferrite cores – Dimensions – Part 11: EC-cores for use in power supply ///
applications
IEC 62317-12, Ferrite cores – Dimensions – Part 12: Ring cores ///
IEC 62317-13, Ferrite cores – Dimensions – Part 13: PQ-cores for use in power supply ///
applications
IEC 62317-14, Ferrite cores – Dimensions – Part 14: EFD-cores for use in power supply ///
applications
Cause of variations in dimension
The shrinkage of powders, the density of mouldings, the deformation of
ferrite cores, etc., are considered as causes of variations in dimension.
They are gathered in the following cause-and-effect diagram in Figure 1.

－ 6 － IEC TR 63090:2017 © IEC 2017

Sintering
powder
Profile deformation
(see IEC 60401-1:2002, 6.4.2)
Deformation
Shrinkage
Deflection-in or -out
Sintered density
(see IEC 60401-1:2002, 6.1.4.1 or 6.1.4.2)
Cause of variations
in dimension
Setting gap Moulding density
(dimension)
Setting gap
Non-uniformity of the density
(dimension)
Machining
Shaping
IEC
Figure 1 – Cause-and-effect diagram of variations in dimension
Consideration of the dimensional tolerance
The dimensional tolerance is considered according to the processing conditions, and the core
part is classified into the following three conditions:
– decided according to the mould and sintering, or
– decided according to the press direction, or
– grinding direction.
DIMENSIONAL TOLERANCES OF FERRITE CORES

1 Scope
This document gives guidelines on the dimensional tolerances of ferrite cores. This document
is considered as general information useful in the dialogue between ferrite core suppliers and
users.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Summary of dimensional tolerances of ferrite cores
4.1 General
Figures 3, 5, 7 and 9 show the plots of the specifications of IEC standards and the catalogues
of some ferrite core suppliers. The recommended boundary is the line connected by the
supposed maximum points of the specifications of the IEC standards. Most of the points are
under the recommended boundary.
4.2 Dimensional tolerances of E-cores
Figure 2 represents typical core geometry with the standard dimension nomenclature applied.
Dimensional tolerances to recommend for a new design of E-cores are shown in Table 2. The
scatter diagram of dimensional tolerances of each part of E-cores is shown in Figure 3.
Dimensional tolerances of each part in the specifications of IEC standards and the catalogues
of some ferrite core suppliers are shown in Table A.1.
B C
D
IEC
Figure 2 – E-core
A
F
E
－ 8 － IEC TR 63090:2017 © IEC 2017
Table 2 – Dimensional tolerances recommended
for a new design of E-cores
Decided
Decided according to mould and according to
Dimension Grinding direction
sintering press
direction
dimension dimension dimension dimension  dimension dimension
min max
A E F C B D
tolerance ± tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm mm
% % % % % %
5 < ≤ 10 4,5 3,5 5,0 5,0 3,0 4,0
10 < 4,0 2,5 3,5 3,0 2,5 3,0
≤ 15
15 < ≤ 20 4,0 2,5 3,0 3,0 2,5 2,5
20 < ≤ 25 3,0 2,5 2,0 2,0 1,5 2,0
25 < ≤ 30 2,5 2,5 － 2,0 1,5 －
30 < ≤ 35 2,5 2,0 1,0
－ － －
35 < ≤ 40 2,0 2,0 1,0
－ － －
40 < ≤ 50 2,0 2,0 － － － －
50 < ≤ 80 2,0 － － － － －
Tolerance of dimension A Tolerance of dimension E
IEC standard
IEC standard
6 6
Specs. in catalogues
Recommended boundary
5 5
Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 10 20 30 40 50 60 70 80 0 10 20 30 40 50
Dimension (mm)
Dimension (mm)
IEC IEC
a) Dimension A b) Dimension E
Tolerance of dimension F
Tolerance of dimension C
IEC standard
IEC standard
Specs. in catalogues
Specs. in catalogues
Recommended boundary
6 Recommended boundary
0 0
30 30
0 5 10 15 20 25 0 5 10 15 20 25
Dimension (mm) Dimension (mm)
IEC IEC
c) Dimension F d) Dimension C
Tolerance of dimension B Tolerance of dimension D
IEC standard
IEC standard
Specs. in catalogues
Specs. in catalogues
Recommended boundaries
Recommended boundaries
0 0
30 40 30 40
0 10 20 0 10 20
Dimension (mm) Dimension (mm)
IEC IEC
e) Dimension B f) Dimension D

Figure 3 – Dimensional tolerances of each part of E-cores
4.3 Dimensional tolerances of ring cores
Figure 4 represents typical core geometry with the standard dimension nomenclature applied.
Dimensional tolerances to recommend for a new design of ring cores are shown in Table 3.
The scatter diagram of dimensional tolerances of each part of ring cores is shown in Figure 5.
Dimensional tolerances of each part in the specifications of IEC standards and the catalogues
of some ferrite core suppliers are shown in Table A.2.
Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)
Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)

－ 10 － IEC TR 63090:2017 © IEC 2017
C
IEC
Figure 4 – Ring core
Table 3 – Dimensional tolerances recommended
for a new design of ring cores
Decided
Decided according to mould and
Dimension
according to
sintering
press direction
min max dimension ϕA dimension ϕB dimension C
tolerance ± tolerance ± tolerance ±
mm mm
% % %
5 < ≤ 10 4,0 4,5 5,5
10 < ≤ 15 4,0 4,0 5,0
15 < 4,0 4,0 4,5
≤ 20
20 < ≤ 30 3,5 3,5 4,0
30 < ≤ 40 3,5 3,5 3,5
40 < ≤ 50 3,5 3,5 －
50 < 3,5 3,5 －
≤ 90
90 < 3,5 3,0 －
≤ 200
øB
øA
Tolerance of dimension øA Tolerance of dimension øB
IEC standard IEC standard
8 8
Specs. in catalogues Specs. in catalogues
7 7
Recommended boundary Recommended boundary
6 6
5 5
4 4
3 3
2 2
1 1
0 0
100 100
1 10 1 10
Dimension (mm) Dimension (mm)
IEC IEC
a) Dimension øA b) Dimension øB
Tolerance of dimension C
IEC standard
8 Specs. in catalogues
Recommended boundary
0 10 20 30
Dimension (mm)
IEC
c) Dimension C
Figure 5 – Dimensional tolerances of each part of ring cores
4.4 Dimensional tolerances of ETD/EER-cores
Figure 6 represents typical core geometry with the standard dimension nomenclature applied.
Dimensional tolerances to recommend for a new design of ETD/EER-cores are shown in
Table 4. The scatter diagram of dimensional tolerances of each part of ETD/EER-cores is
shown in Figure 7. Dimensional tolerances of each part in the specifications of IEC standards
and the catalogues of some ferrite core suppliers are shown in Table A.3.
B C
D
IEC
Figure 6 – ETD/EER-core
Tolerance ± (%)
Tolerance ± (%)
A
øF
Tolerance ± (%)
E
－ 12 － IEC TR 63090:2017 © IEC 2017
Table 4 – Dimensional tolerances recommended
for a new design of ETD/EER-cores
Dimension Decided according to mould and sintering Grinding direction
dimension dimension dimension dimension  dimension dimension
min max
A E ϕF C B D
tolerance ± tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm mm
% % % % % %
6 < - - 3,5 3,5 3,0 4,0
≤ 10
10 < ≤ 15 - - 3,0 3,0 3,0 3,0
15 < ≤ 20 - 3,5 3,0 3,0 2,0 3,0
20 < ≤ 25 3,0 3,5 2,5 2,5 2,0 2,0
25 < ≤ 30 3,0 3,5 - - 1,0 -
30 < ≤ 35 3,0 3,0 - - 1,0 -
35 < ≤ 40 2,5 3,0 - - - -
40 < ≤ 50 2,5 3,0 - - - -
50 < ≤ 60 2,5 - - - - -
Tolerance of dimension A Tolerance of dimension E
IEC standard
IEC standard
6 6
Specs. in catalogues Specs. in catalogues
5 5
Recommended boundary Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 10 20 30 40 50 60
0 10 20 30 40 50
Dimension (mm)
Dimension (mm)
IEC IEC
a) Dimension A b) Dimension E
Tolerance of dimension øF Tolerance of dimension C
IEC standard IEC standard
6 6
Specs. in catalogues Specs. in catalogues
5 5
Recommended boundary Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 5 10 15 20 25 0 5 10 15 20 25
Dimension (mm) Dimension (mm)
IEC IEC
c) Dimension øF d) Dimension C
Tolerance of dimension B Tolerance of dimension D
IEC standard
IEC standard
6 6
Specs. in catalogues
Specs. in catalogues
5 5
Recommended boundary
Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 5 10 15 20 25 30 35 0 5 10 15 20 25
Dimension (mm) Dimension (mm)
IEC IEC
e) Dimension B f) Dimension D
Figure 7 – Dimensional tolerances of each part of ETD/EER-cores
4.5 Dimensional tolerances of planar ER-cores
Figure 8 represents typical core geometry with the standard dimension nomenclature applied.
Dimensional tolerances to recommend for a new design of planar ER-cores are shown in
Table 5. The scatter diagram of dimensional tolerances of each part of planar ER-cores is
shown in Figure 9. Dimensional tolerances of each part in the specifications of IEC standards
and the catalogues of some ferrite core suppliers are shown in Table A.4.
Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)
Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)

－ 14 － IEC TR 63090:2017 © IEC 2017
C B
D
IEC
Figure 8 – Planar ER-core
Table 5 – Dimensional tolerances recommended
for a new design of planar ER-cores
Dimension Decided according to mould and sintering Grinding direction
dimension dimension dimension dimension  dimension dimension
min max
A E ϕF C B D
tolerance ± tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm mm
% % % % % %
1 < - - - - - 5,0
≤ 2
2 < ≤ 3 - - - - 3,5 5,0
3 < ≤ 5 - - 4,5 - 3,5 5,0
5 < - 2,0 2,5 2,5 2,5 4,0
≤ 7
7 < 2,5 2,0 2,5 2,5 2,0 -
≤ 10
10 < ≤ 15 2,5 2,0 2,5 2,5 - -
15 < ≤ 20 2,0 2,0 - 2,0 - -
20 < 2,0 2,0 - 2,0 - -
≤ 25
25 < ≤ 30 2,0 2,0 - 2,0 - -
30 < ≤ 35 2,0 1,5 - - - -
35 < ≤ 40 1,5 - - - - -
A
E
G
øF
Tolerance of dimension A Tolerance of dimension E
IEC standard
IEC standard
6 6
Specs. in catalogues
Specs. in catalogues
5 5
Recommended boundary Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 10 20 30 40 50 0 10 20 30 40
Dimension (mm) Dimension (mm)
IEC IEC
a) Dimension A b) Dimension E
Tolerance of dimension øF Tolerance of dimension C
IEC standard IEC standard
6 6
Specs. in catalogues
Specs. in catalogues
5 5
Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 5 10 15 20 0 5 10 15 20 25 30 35
Dimension (mm) Dimension (mm)
IEC IEC
c) Dimension øF d) Dimension C
Tolerance of dimension B Tolerance of dimension D
IEC standard
IEC standard
6 6
Specs. in catalogues
Specs. in catalogues
5 5
Recommended boundary
Recommended boundary
4 4
3 3
2 2
1 1
0 0
0 5 10 15 0 5 10 15
Dimension (mm) Dimension (mm)
IEC IEC
e) Dimension B f) Dimension D
Figure 9 – Dimensional tolerances of each part of planar ER-cores
5 Conclusion
As a conclusion it is desirable that the dimensional tolerances of cores do not exceed the
recommended boundaries when new cores are designed.

Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)
Tolerance ± (%) Tolerance ± (%) Tolerance ± (%)

－ 16 － IEC TR 63090:2017 © IEC 2017
Annex A
(informative)
Data of dimensional tolerances
A.1 E-core
Table A.1 – Dimensional tolerances of each part (1 of 18)
Dimension A
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm
mm % mm % mm % mm % mm %
E5,3/2 5,25 0,10 1,9 0,05 1,0 - - - - - -
E6,3/2 6,18 0,13 2,0 - - - - - - - -
- 6,50 - - 0,30 4,6 - - - - - -
E8/2 8,00 0,15 1,9 - - - - - - - -
- 8,30 - - - - 0,25 3,0 - - 0,20 2,4
E8,3/4 8,35 0,25 3,0 - - - - - - - -
E8,8/2 9,00 0,40 4,5 - - - - - - - -
E10/3 10,00 0,20 2,0 - - - - - - - -
- 10,20 - - 0,20 2,0 0,25 2,5 0,20 2,0 0,20 2,0
E10,2/5 10,25 0,25 2,5 - - - - - - - -
- 12,50 - - 0,30 2,4 0,30 2,4 0,30 2,4 - -
- 12,60 - - 0,45 3,6 - - - - - -
E13/4 12,65 0,45 3,5 - - - - - - - -
- 12,70 - - - - - - - - 0,40 3,1
E13/6 13,00 0,20 1,5 0,20 1,5 0,20 1,5 - - 0,20 1,5
- 13,00 - - 0,30 2,3 - - - - - -
- 14,00 - - 0,30 2,1 0,30 2,1 - - - -
E16/4,8 16,00 0,30 1,9 0,30 1,9 0,30 1,9 0,30 1,9 0,30 1,9
E16/5 16,00 - - 0,60 3,8 - - - - - -
- 16,10 0,60 3,8 0,25 1,6 - - - - 0,60 3,7
- 18,00 - - 0,35 1,9 - - - - - -
E19/5 19,00 0,40 2,1 0,30 1,6 0,35 1,8 - - - -
- 19,05 - - 0,38 2,0 - - - - - -
- 19,10 - - 0,30 1,6 - - 0,30 1,6 0,30 1,6
- 19,15 - - - - 0,50 2,6 - - - -
E19,3/4,8 19,29 0,32 1,7 0,32 1,7 - - 0,32 1,7 0,32 1,7
- 20,00 - - 0,40 2,0 0,30 1,5 - - 0,40 2,0
- 20,15 - - - - - - - - 0,55 2,7
E20/6 20,20 0,70 3,5 - - - - - - - -
- 20,40 - - 0,40 2,0 - - - - - -
- 21,00 - - 0,30 1,4 - - - - - -

Table A.1 (2 of 18)
Dimension A
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 21,80 - - 0,40 1,8 - - - - - -
- 22,00 - - 0,30 1,4 0,30 1,4 0,30 1,4 0,30 1,4
- 22,00 - - 0,50 2,3 0,45 2,0 0,45 2,0 - -
- 22,00 - - - - 0,50 2,3 - - - -
- 24,50 - - 0,35 1,4 - - - - - -
- 25,00 - - 0,30 1,2 0,50 2,0 - - - -
- 25,00 - - - - 0,75 3,0 - - - -
E25/7 25,05 0,75 3,0 0,75 3,0 - - - - 0,75 3,0
- 25,30   0,40 1,6 0,50 2,0 0,55 2,2 - -
E25,4/6 25,40 0,50 2,0 0,38 1,5 0,50 2,0 - - 0,50 2,0
E25,4/6,3 25,40 0,50 2,0 0,40 1,6 0,45 1,8 - - 0,76 3,0
- 26,00 - - 0,30 1,2 - - - - - -
- 27,00 - - - - 0,40 1,5 - - - -
- 27,30 - - 0,50 1,8 - - - - - -
- 28,00 - - 0,30 1,1 0,40 1,4 0,60 2,1 - -
- 28,00 - - 0,40 1,4 0,50 1,8 0,40 1,4 - -
- 28,00 - - 0,50 1,8 0,55 2,0 0,50 1,8 - -
- 28,20 - - 0,30 1,1 - - - - - -
- 29,80 - - 0,30 1,0 - - - - - -
- 29,80 - - 0,50 1,7 - - - - - -
- 30,00 - - 0,35 1,2 0,60 2,0 - - - -
- 30,00 - - 0,40 1,3 - - - - - -
- 30,00 - - 0,50 1,7 0,50 1,7 0,50 1,7 0,50 1,7
E30/11 30,05 0,55 1,8 - - - - - - - -
- 30,10 - - 0,30 1,0 - - - - 0,70 2,3
- 30,50 - - 0,50 1,6 - - - - - -
- 32,00 - - 0,80 2,5 - - - - - -
E32/9 32,10 0,80 2,5 - -   - - 0,80 2,5
E33/13 33,00 0,70 2,1 0,70 2,1 0,50 1,5 0,75 2,3 - -
- 33,00 - -   0,55 1,7 - - - -
- 33,00 - - - - 0,70 2,1 - - - -
- 33,10 - - 0,40 1,2 - - - - - -
- 33,20 - - 0,50 1,5 - - - - - -
- 34,32 - - - - 0,69 2,0 - - - -
- 34,40 - - - - - - 0,50 1,5 - -
- 34,54 - - - - - - - - 1,00 2,9
E34,6/9 34,60 0,70 2,0 0,50 1,4 - - - - 0,50 1,4
- 34,93 - - 0,50 1,4 - - - - - -

－ 18 － IEC TR 63090:2017 © IEC 2017
Table A.1 (3 of 18)
Dimension A
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 35,00 - - 0,50 1,4 0,50 1,4 0,65 1,9 - -
- 35,00 - - 0,60 1,7 0,60 1,7 - - - -
E35/10 35,10 0,60 1,7 - - - - - - - -
- 40,00 - - 0,50 1,3 0,60 1,5 0,50 1,3 0,50 1,3
- 40,00 - - 0,60 1,5 0,75 1,9 0,70 1,8 - -
E40/11 40,10 0,60 1,5 - - - - - - - -
- 40,64 - - - - 0,81 2,0 0,60 1,5 - -
- 40,80 - - 0,55 1,3 - - - - - -
E41/13 41,07 0,80 1,9 - - - - - - 0,80 1,9
- 41,28 - - 0,80 1,9 - - - - - -
- 42,00 - - 0,85 2,0 0,80 1,9 0,50 1,2
E42/15 42,15 0,85 2,0 - - - - - - - -
E42/20 42,15 0,85 2,0 - - - - - - 0,85 2,0
- 44,00 - - - - 0,60 1,4 0,60 1,4 - -
- 44,00 - - - - 0,75 1,7 - - - -
E47/16 46,99 0,89 1,9 - - - - - - - -
- 47,12 - - - - - - - - 0,48 1,0
- 49,07 - - 0,64 1,3 - - - - - -
- 50,00 - - 0,70 1,4 0,70 1,4 0,70 1,4 0,85 1,7
- 50,00 - - - - 0,85 1,7 - - - -
E50/15 50,15 0,85 1,7 - - - - - - - -
- 55,00 - - 1,05 1,9 0,95 1,7 - - - -
E55/21 55,15 1,05 1,9 - - - - - - 1,05 1,9
E55/25 55,15 1,05 1,9 - - - - - - - -
- 56,57 - - 0,55 1,0 - - - - 1,00 1,8
- 60,00 - - - - 0,95 1,6 0,80 1,3 0,95 1,6
- 60,00 - - - - 1,00 1,7 - - - -
E60/16 60,15 0,95 1,6 - - - - - - - -
- 65,00   - - 1,35 2,1 - - - -
E65/27 65,15 1,35 2,1 - -   - - - -
- 70,00 - - - - 0,80 1,1 - - - -
- 70,50 - - 1,50 2,1 - - - - - -
- 79,30 - - - - 1,60 2,0 - - - -
- 80,00 - - 1,00 1,3 - - - - - -

Table A.1 (4 of 18)
Dimension E
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
E6,3/2 3,70 0,10 2,7 - - - - - - - -
E5,3/2 3,90 0,10 2,6 - - - - - - - -
E8/2 5,70 0,10 1,8 - - - - - - - -
E8,3/4 6,30 0,20 3,2 - - - - - - - -
E8,8/2 5,20 0,13 2,5 - - - - - - - -
E10/3 7,15 0,15 2,1 - - - - - - - -
E10,2/5 7,80 0,20 2,6 - - - - - - - -
E13/4 9,20 0,30 3,3 - - - - - - - -
E13/6 10,20 0,20 2,0 - - - - - - - -
E16/4,8 12,00 0,30 2,5 - - - - - - - -
E16/5 11,60 0,30 2,6 - - - - - - - -
E19/5 14,50 0,30 2,1 - - - - - - - -
E19,3/4,8 14,38 0,33 2,3 - - - - - - - -
E20/6 14,40 0,30 2,1 - - - - - - - -
E25/7 17,90 0,40 2,2 - - - - - - - -
E25,4/6 19,00 0,40 2,1 - - - - - - - -
E25,4/6,3 19,18 0,63 3,3 - - - - - - - -
E30/11 20,00 0,50 2,5 - - - - - - - -
E32/9 23,20 0,50 2,2 - - - - - - - -
E33/13 23,60 0,50 2,1 - - - - - - - -
E34,6/9 25,60 0,60 2,3 - - - - - - - -
E35/10 25,00 0,50 2,0 - - - - - - - -
E40/11 28,00 0,50 1,8 - - - - - - - -
E41/13 29,07 0,52 1,8 - - - - - - - -
E42/15 30,10 0,60 2,0 - - - - - - - -
E42/20 30,10 0,60 2,0 - - - - - - - -
E47/16 32,14 0,42 1,3 - - - - - - - -
E50/15 35,00 0,70 2,0 - - - - - - - -
E55/21 38,10 0,60 1,6 - - - - - - - -
E55/25 38,10 0,60 1,6 - - - - - - - -
E60/16 44,50 0,80 1,8 - - - - - - - -
E65/27 44,95 0,75 1,7 - - - - - - - -

－ 20 － IEC TR 63090:2017 © IEC 2017
Table A.1 (5 of 18)
Dimension F
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
E5,3/2 1,35
0,05 3,7 0,05 3,7 - - - - - -
E6,3/2 1,35
0,05 3,7 - - - - - - - -
- 1,50 - - 0,15 1,0 - - - - - -
E8,3/4 1,80 0,20 11,1 - - 0,20 11,1 - - - -
- 1,85 - - - - - - - - 0,15 8,1
E8,8/2 1,90 0,12 6,3 - - - - - - - -
- 1,91 - - 0,13 6,7 - - - - - -
E8/2 2,35 0,05 2,1 - - - - - - - -
E10,2/5 2,40 0,20 8,3 - - 0,20 8,3 - - - -
- 2,45 - - 0,15 6,1 - - 0,15 6,1 0,15 6,1
- 2,50 - - - - - - 0,10 4,0 - -
- 2,60 - - 0,20 7,7 - - - - - -
E13/6 2,75 0,15 5,5 0,15 5,5 0,15 5,5 - - 0,15 5,5
E10/3 2,94 0,06 2,0 - - - - - - - -
- 3,00 - - 0,10 3,3 - - - - - -
- 3,18 - - - - - - - - 0,18 5,7
- 3,20 - - - - 0,18 5,5 - - - -
E13/4 3,55 0,15 4,2 - - - - - - - -
- 3,65 - - - - - - - - 0,15 4,1
- 3,70 - - 0,15 4,1 - - - - - -
- 3,80 - - 0,15 3,9 - - - - - -
E16/4,8 4,00 0,20 5,0 0,20 5,0 0,20 5,0 0,20 5,0 0,20 5,0
- 4,00 - - 0,10 2,5 - - - - - -
- 4,20 - - - - - - 0,20 4,8 - -
- 4,40 - - 0,15 3,4 - - - - - -
E19/5 4,50 0,20 4,4 0,20 4,4 0,20 4,4 - - - -
E16/5 4,55 0,15 3,3   0,15 3,3 - - 0,15 3,3
- 4,65 - - - - 0,15 3,2 - - - -
- 4,68 - - - - - - 0,15 3,2 - -
- 4,70 - - 0,15 3,2 - - 0,20 4,3 - -
E19,3/4,8 4,75 0,08 1,7 0,13 2,7 - - - - - -
- 4,75 - - - - - - - - 0,08 1,7
- 5,00 - - 0,20 4,0 - - - - 0,20 4,0
- 5,00 - - 0,10 2,0 - - - - - -
- 5,60 - - - - 0,20 3,6 - - - -
E20/6 5,70 0,20 3,5 0,20 3,5 0,20 3,5 - - 0,20 3,5
- 5,75 - - - - 0,25 4,3 - - 0,25 4,3
- 5,80 - - - - 0,30 5,2 - - - -

Table A.1 (6 of 18)
Dimension F
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 5,85 - - - - 0,15 2,6 - - - -
- 6,00 - - 0,25 4,2 - - 0,25 4,2 - -
E25,4/6 6,35 0,30 4,7 0,30 4,7 0,30 4,7 - - - -
E25,4/6,3 6,35 0,25 3,9 0,25 3,9 0,25 3,9 - - 0,25 3,9
- 6,40 - - 0,30 4,7 0,25 3,9 - - - -
- 6,40 - - 0,20 3,1 - - - - - -
- 6,50 - - 0,25 3,8 0,30 4,6 - - - -
- 6,80 - - - - - - 0,30 4,4 - -
- 6,90 - - 0,20 2,9 - - - - - -
- 6,95 - - - - - - - - 0,25 3,6
- 7,10 - - - - 0,20 2,8 - - - -
- 7,20 - - - - 0,25 3,5 - - - -
- 7,20 - - 0,30 4,2 0,30 4,2 - - - -
E25/7 7,25 0,25 3,4 0,25 3,4 0,25 3,4 - - 0,25 3,4
- 7,30 - - 0,20 2,7 - - - - - -
- 7,50 - - 0,25 3,3 - - 0,25 3,3 - -
- 7,50 - - - - - - 0,30 4,0 - -
- 7,80 - - 0,15 1,9 - - - - - -
- 8,00 - - 0,20 2,5 0,20 2,5 0,20 2,5 - -
- 8,10 - - 0,15 1,9 - - - - - -
- 8,10 - - 0,20 2,5 - - - - - -
- 8,50 - - 0,30 3,5 - - - - - -
- 9,00 - - 0,20 2,2 - - - - - -
E32/9 9,20 0,30 3,3 0,30 3,3 - - - - 0,30 3,3
- 9,27 - - 0,25 2,7 - - - - - -
- 9,32 - - - - 0,18 1,9 0,20 2,1 - -
- 9,39 - - - - - - - - 0,27 2,9
E34,6/9 9,40 0,30 3,2 0,30 3,2 - - - - 0,30 3,2
- 9,53 - - 0,25 2,6 - - - - - -
E33/13 9,70 0,30 3,1 0,30 3,1 0,30 3,1 - - - -
- 9,80 - - 0,30 3,1 - - - - - -
E35/10 10,00 0,30 3,0 0,30 3,0 0,30 3,0 0,30 3,0 - -
- 10,30 - - 0,25 2,4 - - 0,30 2,9 - -
E40/11 10,35 0,65 6,3 - - - - - - - -
- 10,50 - - 0,20 1,9 - - - - - -
- 10,69 - - 0,27 2,5 - - - - - -
E30/11 10,70 0,30 2,8 - - 0,30 2,8 - - 0,30 2,8
- 11,00 - - 0,30 2,7 - - 0,30 2,7 - -

－ 22 － IEC TR 63090:2017 © IEC 2017
Table A.1 (7 of 18)
Dimension F
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 11,65 - - - - 0,35 3,0 - - - -
- 11,70 - - - - 0,25 2,1 - - - -
- 11,70 - - - - 0,30 2,6 - - - -
E42/15 11,95 0,25 2,1 - - - - - - 0,25 2,1
E42/20 11,95 0,25 2,1 - - - - - - - -
- 12,00 - - 0,35 2,9 0,20 1,7 0,30 2,5 - -
- 12,00 - - - - - - 0,35 2,9 - -
- 12,20 - - 0,25 2,0 - - - - - -
- 12,45 - - - - 0,25 2,0 0,25 2,0 - -
- 12,50 - - 0,30 2,4 - - 0,25 2,0 - -
- 12,64 - - - - - - - - 0,45 3,6
E41/13 12,65 0,45 3,6 - - - - - - - -
- 12,70 - - 0,25 2,0 - - - - - -
E50/15 14,60 0,40 2,7 - - 0,40 2,7 - - 0,40 2,7
- 15,00 - - 0,40 2,7 - - 0,40 2,7 - -
E60/16 15,60 0,40 2,6 0,30 1,9 0,40 2,6 - - 0,40 2,6
E47/16 15,61 0,26 1,7 - - - - - - - -
- 15,62 - - 0,25 1,6 - - - - 0,25 1,6
- 16,00 - - - - - - 0,40 2,5 - -
E55/21 16,95 0,25 1,5 - - - - - - 0,25 1,5
E55/25 16,95 0,25 1,5 - - - - - - - -
- 17,00 - - - - 0,40 2,4 - - - -
- 17,20 - - 0,25 1,5 - - - - - -
- 18,70 - - 0,30 1,6 - - - - - -
- 18,80 - - - - - - - - 0,25 1,3
E65/27 19,65 0,35 1,8 - - 0,35 1,8 - - - -
- 19,75 - - - - 0,25 1,3 - - - -
- 19,80 - - 0,40 2,0 - - - - - -
- 22,00 - - 0,35 1,6 - - - - - -

Table A.1 (8 of 18)
Dimension C
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 1,80 - - 0,15 8,3 - - - - - -
E8,8/2 1,90 0,12 6,3 - - - - - - - -
- 1,91 - - 0,10 5,4 - - - - - -
- 1,92 - - - - 0,08 4,2 - - - -
E5,3/2 1,95 0,05 2,6 0,05 2,6 - - - - - -
E6,3/2 1,95 0,05 2,6 - - - - - - - -
E8/2 2,35 0,05 2,1 - - - - - - - -
E10/3 2,94 0,06 2,0 - - - - - - - -
E13/4 3,55 0,15 4,2 - - - - - - - -
E8,3/4 3,60 0,20 5,6 - - 0,20 5,6 - - 0,20 5,6
- 3,70 - - 0,15 4,1 - - - - - -
- 3,75 - - - - 0,15 4,0 - - - -
- 4,20 - - 0,20 4,8 - - - - - -
E16/5 4,50 0,20 4,4 - - - - - - 0,20 4,4
E10,2/5 4,70 0,20 4,3 - - 0,20 4,3 - - - -
- 4,70 - - 0,20 4,3 - - - - - -
E19,3/4,8 4,75 0,13 2,6 0,13 2,7 - - 0,13 2,7 0,13 2,7
- 4,75 - - 0,15 3,2 - - 0,15 3,2 0,15 3,2
E16/4,8 4,80 0,20 4,2 - - 0,20 4,2 - - - -
E19/5 5,00 0,20 4,0 0,20 4,0 0,20 4,0 0,20 4,0 0,20 4,0
- 5,00 - - 0,10 2,0   - - - -
- 5,10 - - - - - - - - 0,20 3,9
- 5,20 - - 0,20 3,8 - - 0,20 3,8 - -
- 5,60 - - - - 0,20 3,6 - - - -
E20/6 5,65 0,25 4,4 0,25 4,4 0,25 4,4 - - 0,25 4,4
- 5,75 - - - - 0,25 4,3 - - 0,25 4,3
- 5,80 - - - - 0,30 5,2 - - - -
- 6,00 - - 0,03 0,4 - - 0,03 0,4 - -
E13/6 6,15 0,15 2,4 0,15 2,4 0,15 2,4 - - 0,15 2,4
E25,4/6,3 6,29 0,19 3,0 - - 0,19 3,0 - - 0,19 3,0
E25,4/6 6,35 0,30 4,7 0,25 3,9 0,30 4,7 - - 0,25 3,9
- 6,35 - - 0,30 4,7 - - - - - -
- 6,40 - - 0,30 4,7 0,20 3,1 - - - -
- 6,50 - - 0,20 3,1 - - - - - -
- 6,50 - - 0,25 3,8 - - - - - -
- 6,60 - - 0,25 3,8 - - - - - -
- 6,75 - - - - 0,25 3,7 - - - -
- 6,80 - - - - 0,20 2,9 - - 0,20 2,9

－ 24 － IEC TR 63090:2017 © IEC 2017
Table A.1 (9 of 18)
Dimension C
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 6,90 - - 0,30 4,3 - - - - - -
- 7,00 - - 0,20 2,9 - - - - - -
- 7,00 - - 0,25 3,6 - - - - - -
- 7,05 - - - - - - - - 0,25 3,5
- 7,10 - - 0,20 2,8 0,20 2,8 - - - -
E25/7 7,20 0,30 4,2 0,30 4,2 0,30 4,2 - - 0,30 4,2
- 7,40 - - 0,25 3,4 - - - - - -
- 7,50 - - 0,20 2,7 - - - - - -
- 8,00 - - 0,15 1,9 - - - - - -
- 8,00 - - 0,30 3,8 - - - - - -
- 8,50 - - - - 0,20 2,4 - - - -
- 8,75 - - 0,15 1,7 - - - - - -
- 9,00 - - 0,20 2,2 - - - - - -
E32/9 9,15 0,35 3,8 0,35 3,8 - - - - 0,35 3,8
- 9,20 - - - - - - 0,30 3,3 - -
- 9,27 - - 0,25 2,7 - - - - - -
E34,6/9 9,31 0,41 4,4 - - - - - - 0,30 3,2
- 9,32 - - - - 0,18 1,9 - - - -
- 9,40 - - 0,15 1,6 - - - - - -
- 9,40 - - 0,30 3,2 - - - - - -
- 9,53 - - 0,25 2,6 - - - - 0,38 4,0
- 9,58 - - - - 0,18 1,9 - - - -
- 9,70 - - 0,20 2,1 - - - - - -
E35/10 10,00 0,30 3,0 0,30 3,0 0,30 3,0 0,30 3,0 - -
- 10,00 - - 0,20 2,0 - - - - - -
- 10,30 - - 0,25 2,4 - - - - - -
- 10,60 - - - - 0,20 1,9 - - - -
- 10,69 - - 0,30 2,8 - - - - - -
E30/11 10,70 0,30 2,8 0,15 1,4 0,25 2,3 - - 0,30 2,8
E35/10 10,70 0,30 2,8 0,23 2,1 0,30 2,8 - - - -
- 10,90 - - - - - - 0,20 1,8 - -
- 11,00 - - 0,30 2,7 - - 0,30 2,7 - -
- 11,65 - - - - 0,35 3,0 - - - -
- 11,70 - - 0,30 2,6 0,30 2,6 - - - -
- 11,75 - - - - 0,30 2,6 - - - -
- 12,00 - - 0,30 2,5 - - 0,30 2,5 - -
- 12,00 - - 0,35 2,9 - - 0,35 2,9 - -
- 12,40 - - 0,30 2,4 - - - - - -

Table A.1 (10 of 18)
Dimension C
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
- 12,45 - - - - - - 0,25 2,0 - -
E41/13 12,57 0,38 3,0 - - - - - - 0,38 3,0
E33/13 12,70 0,30 2,4 0,30 2,4 0,30 2,4 - - - -
- 12,70 - - 0,25 2,0 - - - - - -
- 13,00 - - - - - - 0,30 2,3 - -
E50/15 14,60 0,40 2,7 - - 0,40 2,7 - - 0,40 2,7
E42/15 14,95 0,25 1,7 - - - - - - 0,25 1,7
- 15,00 - - 0,30 2,0 0,25 1,7 0,40 2,7 - -
- 15,00 - - 0,40 2,7 0,40 2,7 - - - -
- 15,20 - - 0,25 1,6 - - 0,30 2,0 - -
- 15,30 - - - - - - 0,30 2,0 - -
E60/16 15,60 0,40 2,6 - - 0,40 2,6 - - 0,40 2,6
E47/16 15,61 0,26 1,7
- 15,62   0,30 1,9 - - - - 0,25 1,6
- 15,62 - - 0,43 2,8 - - - - - -
- 15,80 - - 0,30 1,9 - - - - - -
- 16,00 - - - - - - 0,40 2,5 - -
- 18,70 - - 0,30 1,6 - - - - - -
- 18,80 - - - - - - - - 0,25 1,3
E42/20 19,60 0,40 2,0 - - 0,40 2,0 - - - -
- 19,70 - - - - - - - - 0,30 1,5
- 19,80 - - 0,40 2,0 0,40 2,0 - - - -
- 20,00 - - 0,40 2,0 - - 0,30 1,5 - -
E55/21 20,70 0,30 1,4 - - 0,40 1,9 - - 0,30 1,4
- 21,00 - - 0,30 1,4 - - - - - -
E55/25 24,60 0,40 1,6 - - - - - - - -
- 25,00 - - 0,40 1,6 - - - - - -
- 26,90     0,50 1,9
E65/27 27,00 0,40 1,5 - -   - - - -
- 32,00 - - 0,40 1,3 - - - - - -

－ 26 － IEC TR 63090:2017 © IEC 2017
Table A.1 (11 of 18)
Dimension B
Specifications Specifications Specifications Specifications
IEC
in in in in
standard
Dimension
catalogue W catalogue X catalogue Y catalogue Z
IEC size
mm tolerance ± tolerance ± tolerance ± tolerance ± tolerance ±
mm % mm % mm % mm % mm %
E42/15 2,00 0,20 1,0 - - 0,30 1,4 0,30 1,4 - -
E42/20 2,00 0,20 1,0 - - - - - - - -
- 2,00 - - 0,15 5,0 - - - - - -
E5,3/2 2,65 0,08 3,0 0,05 1,9 - - - - - -
E6,3/2 2,85 0,05 1,8 - - - - - - - -
- 2,90 - - 0,10 3,4 - - - - - -
- 3,50 - - 0,10 2,9 - - - - - -
- 3,94 - - 0,13 3,2 - - - - - -
E8/2 4,00 0,05 1,3 0,10 2,5 0,10 2,5 - - 0,10 2,5
E8,3/4 4,00 0,10 2,5 - - - - - - - -
E8,8/2 4,00 0,15 3,8 - - - - - - - -
- 4,45 - - - - 0,20 4,5 - - - -
E10/3 4,94 0,06 1,2 - - - - - - - -
E10,2/5 5,50 0,15 2,7 0,20 3,6 0,25 4,5 0,10 1,8 0,20 3,6
- 5,60 - - 0,15 2,7 - - - - - -
- 5,65 - - 0,20 3
...