IEC 63093-2:2020

IEC 63093-2 ®
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface
irregularities –
Part 2: Pot-cores for use in telecommunications, power supply, and filter
applications
Noyaux ferrites – Lignes directrices relatives aux dimensions et limites des
irrégularités de surface –
Partie 2: Circuits magnétiques en pots utilisés dans des applications
de télécommunications, d'alimentation électrique et de filtre

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IEC 63093-2 ®
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface

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

applications
Noyaux ferrites – Lignes directrices relatives aux dimensions et limites des

irrégularités de surface –
Partie 2: Circuits magnétiques en pots utilisés dans des applications

de télécommunications, d'alimentation électrique et de filtre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-8008-9

– 2 – IEC 63093-2:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Primary dimensions . 7
4.1 Dimensions of pot-cores . 7
4.1.1 General . 7
4.1.2 Principal dimensions . 7
4.1.3 Wire-ways. 9
4.1.4 Effective parameter values . 9
4.2 Main dimensions for coil formers . 10
5 Limits of surface irregularities . 11
5.1 General . 11
5.2 Examples of surface irregularities . 11
5.3 Chips and ragged edges . 12
5.3.1 General . 12
5.3.2 Chips and ragged edges on the mating surfaces . 12
5.3.3 Chips and ragged edges on the other surfaces . 12
5.4 Cracks . 15
5.5 Pull-out, crystallite and pore locations . 16
5.6 Flash . 16
Annex A (informative) Pot-core design . 18
Annex B (informative) Example of gauges to check the dimensions of pot-cores . 19
B.1 General . 19
B.2 Procedure and requirements . 20
Bibliography . 21

Figure 1 – Principal dimensions of pot-cores without back wall slots . 8
Figure 2 – Principal dimensions of pot-cores with back wall slots . 8
Figure 3 – Main dimensions of coil formers for pot-cores . 11
Figure 4 – Examples of surface irregularities . 12
Figure 5 – Chips location for pot-cores . 13
Figure 6 – Cracks location – Top view . 15
Figure 7 – Cracks location – Bottom view . 15
Figure 8 – Pull-out, crystallite and pore locations . 16
Figure 9 – Flash location. 17
Figure B.1 – Dimensions of gauge A . 19
Figure B.2 – Dimensions of gauges B and C . 20

Table 1 – Principal dimensions of pot-cores . 7
Table 2 – Limits for dimensions C and G . 9
Table 3 – Minimum wire-way depth . 9
Table 4 – Effective parameter values for pot-cores with a centre hole . 10
Table 5 – Effective parameter values for pot-cores without a centre hole . 10

Table 6 – Main dimensions of coil formers for pot-cores . 11
Table 7 – Area and length references of irregularities for visual inspection . 14
Table 8 – Limits for cracks . 16
Table A.1 – Ratio of diameter to height . 18
Table B.1 – Dimensions of gauge A . 19
Table B.2 – Dimensions of gauges B and C . 20

– 4 – IEC 63093-2:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

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

FOREWORD
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