IEC 63093-12:2019

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 12: Ring-cores

IEC 63093-12:2019 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of ring-cores, also called toroid cores, and the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to ring-cores. This document is a specification useful in the negotiations between ferrite core manufacturers and users about surface irregularities.
This first edition cancels and replaces the first edition of IEC 62317-12 published in 2016 and the second edition of IEC 60424-4 published in 2015. This edition constitutes a technical revision.
IEC 63093-12 integrates the contents of IEC 62317-12:2016 and IEC 60424-4:2015.

Noyaux ferrites - Lignes directrices relatives aux dimensions et aux limites des irrégularités de surface - Partie 12: Noyaux toriques

L’IEC 63093-12:2019 spécifie les dimensions importantes pour l’interchangeabilité matérielle d’une gamme préférentielle de noyaux toriques, et les valeurs des paramètres effectifs à utiliser dans les calculs les impliquant. Elle donne également des lignes directrices relatives aux limites admises des irrégularités de surface applicables aux noyaux toriques. Le présent document est une spécification utile dans les négociations entre les fabricants et les clients de noyaux ferrites au sujet des irrégularités de surface.
Cette première édition annule et remplace la première édition de l’IEC 62317-12 parue en 2016 et la deuxième édition de l’IEC 60424-4 parue en 2015. Cette édition constitue une révision technique.
L’IEC 63093-12 intègre le contenu de l’IEC 62317-12:2016 et de l’IEC 60424-4:2015.

General Information

• Status: Published
• Publication Date: 03-Apr-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: WG 1 - TC 51/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 26-Apr-2019
• Completion Date: 04-Apr-2019

Relations

• Replaces: IEC 62317-12:2016 - Ferrite cores - Dimensions - Part 12: Ring cores
• Effective Date: 05-Sep-2023
• Replaces: IEC 60424-4:2015 - Ferrite cores - Guidelines on the limits of surface irregularities - Part 4: Ring-cores
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 63093-12 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface irregularities –
Part 12: Ring-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des
irrégularités de surface –
Partie 12: Noyaux toriques
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IEC 63093-12 ®
Edition 1.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on dimensions and the limits of surface irregularities –

Part 12: Ring-cores
Noyaux ferrites – Lignes directrices relatives aux dimensions et aux limites des

irrégularités de surface –
Partie 12: Noyaux toriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-6715-8

– 2 – IEC 63093-12:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Primary dimensions . 5
4.1 General . 5
4.2 Dimensions of ring-cores . 6
4.2.1 Designation of dimensions . 6
4.2.2 Identification of standard sizes . 6
4.2.3 Effective parameter values. 6
4.2.4 Dimensional limits for standard sizes . 7
4.3 Coating . 13
5 Limits of surface irregularities . 13
5.1 Uncoated ring-cores . 13
5.1.1 General. 13
5.1.2 Chips and ragged edges . 13
5.1.3 Cracks and pull-outs . 14
5.1.4 Crystallites . 14
5.1.5 Pores . 15
5.2 Coated ring-cores . 15
5.2.1 General. 15
5.2.2 Coating features . 15
5.2.3 Coating performance . 16
5.3 Area and length reference for visual inspection . 16
Bibliography . 18

Figure 1 – Dimensions of ring-cores . 6
Figure 2 – Location of chips and ragged edges on ring-cores . 14
Figure 3 – Location of cracks and pull-out on ring-cores . 14
Figure 4 – Location of crystallite on ring-cores . 15
Figure 5 – Location of pore on ring-cores . 15

Table 1 – Ring-core dimension designations . 6
Table 2 – Standard ring-cores . 7
Table 3 – Effective parameters of ring-cores . 9
Table 4 – Recommended dimensional limits for uncoated ring-cores . 11
Table 5 – Area and length reference for visual inspection . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON DIMENSIONS
AND THE LIMITS OF SURFACE IRREGULARITIES –

Part 12: Ring-cores
FOREWORD
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International Standard IEC 63093-12 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This first edition cancels and replaces the first edition of IEC 62317-12 published in 2016 and
the second edition of IEC 60424-4 published in 2015. This edition constitutes a technical
revision.
This edition includes the following significant technical changes with respect to IEC 62317-
12:2016 and IEC 60424-4:2015:
a) IEC 63093-12 integrates the contents of IEC 62317-12:2016 and IEC 60424-4:2015.

– 4 – IEC 63093-12:2019 © IEC 2019
The text of this International Standard is based on the following documents:
FDIS Report on voting
51/1271/FDIS 51/1284/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This docume
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