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Abstract

Status: Published
Publication Date: 25-May-2021

ICS: 29.100.10 - Magnetic components

Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials

Current Stage: PPUB - Publication issued
Start Date: 26-May-2021
Completion Date: 16-Jul-2021

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IEC 62044-2:2005/COR1:2021 - Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level
Released:5/26/2021 - Page 1 preview

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IEC 62044-2:2005/COR1:2021 - Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level Released:5/26/2021

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Corrects: IEC 62044-2:2005 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level
Effective Date: 05-Sep-2023

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IEC 62044-2:2005/COR1:2021 - Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level Released:5/26/2021

English and French language (3 pages)

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Frequently Asked Questions

What is IEC 62044-2:2005/COR1:2021?

IEC 62044-2:2005/COR1:2021 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level". This standard covers: Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level

What is the scope of IEC 62044-2:2005/COR1:2021?

Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level

What ICS categories does IEC 62044-2:2005/COR1:2021 belong to?

IEC 62044-2:2005/COR1:2021 is classified under the following ICS (International Classification for Standards) categories: 29.100.10 - Magnetic components. The ICS classification helps identify the subject area and facilitates finding related standards.

What standards are related to IEC 62044-2:2005/COR1:2021?

IEC 62044-2:2005/COR1:2021 has the following relationships with other standards: It is inter standard links to IEC 62044-2:2005. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

How can I access IEC 62044-2:2005/COR1:2021?

IEC 62044-2:2005/COR1:2021 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)

IEC 62044-2:2005/COR1:2021 - C...

 IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
IEC 62044-2 IEC 62044-2
Edition 1.0 2005-03 Édition 1.0 2005-03

CORES MADE OF SOFT MAGNETIC MATERIALS – NOYAUX EN MATÉRIAUX MAGNÉTIQUES DOUX –
MEASURING METHODS – MÉTHODES DE MESURE –

Part 2: Magnetic properties at low excitation Partie 2: Propriétés magnétiques à niveau
level d'excitation faible
CO RRI G E NDUM 1
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.

3.1
Replace Formula (2) with the following:
∞
VV=
m ∑ n
n=2
3.2
Replace Formula (3) with the following:

VV
mf
THD = 20 lg

F
µ ⋅CCF
ea
Replace Formula (4) with the following:
∞
VV=
m ∑ n
n=2
IEC 62044-2:2005-03/COR1:2021-05 (en-fr)

– 2 – IEC 62044-2:2005/COR1:2021
 IEC 2021
12.2 Measuring coil
Replace, in item a), th
...

IEC

IEC/IEEE 61007-389:2026(Main)

Transformers and inductors for use in electronic and telecommunication equipment - Part 389: Measuring methods and test procedures

IEC/IEEE 61007-389:2026 describes a number of tests for use in determining the significant parameters and performance characteristics of transformers and inductors for use in electronics and telecommunication equipment. These test methods are designed primarily for transformers and inductors used in all types of electronics applications that can be involved in any specification for such components. Even though these tests could be applied supplementally for other types of transformers, such as those with larger power ratings used in the utility power industry, the tests discussed in this document are not intended to replace the tests in standards for those other transformers.
Some of the tests described are intended for qualifying a product for a specific application, while others are test practices used for manufacturing and customer acceptance testing. The test methods described here include those parameters most commonly used in the electronics transformer and inductor industry: electric strength, resistance, power loss, inductance, impedance, balance, transformation ratio and many others used less frequently.
This first edition of IEC/IEEE 61007-389 cancels and replaces IEC 61007:2020 and IEEE 389:2020, which has been technically revised.
This edition includes the following significant technical changes with respect to the previous edition:
a) added the following new test items:
1) transformer capacitance (in 4.5.6.1);
2) voltage transformation (VT) ratio (in 4.5.7.3);
3) thermo-couple method (in 4.5.15.3);
4) bridge circuit measurement (in 4.5.16.3);
5) dynamic CM capacitance of a transformer (in 4.5.20);
6) tests of the parameter in transformer equivalent circuit (in 4.5.21);
b) updated the following test items:
1) added test purpose: AC resistance (in 4.5.1.2); dielectric withstand voltage test (in 4.5.2.1); effective inductance (in 4.5.4.1); capacitance unbalance (in 4.5.5.1); total harmonic distortion (in 4.5.13);
2) testing fundamentals and equipment modification: DC winding resistance (in 4.5.1.1); AC resistance (in 4.5.1.2); winding continuity (in 4.5.1.3); excitation apparent-power measurements (in 4.5.3.4); capacitance unbalance (in 4.5.5.1); self-capacitance (distributed capacitance) (in 4.5.6.2); inter-winding capacitance (in 4.5.6.3); inherent self-resonance (in 4.5.8.1); resonant assemblies (in 4.5.8.2); insertion loss (in 4.5.9.1); return loss (in 4.5.9.2); crosstalk (in 4.5.10); pulse characteristics (in 4.5.11.1); transformer response measurements (in 4.5.11.2); total harmonic distortion (in 4.5.13); method utilizing the change in DC resistance of a winding (in 4.5.15.1); method using an additional series-opposing bifilar winding (in 4.5.15.2); safety screens (in 4.5.17.2); magnetic radiation (in 4.5.17.4); acoustic noise (in 4.5.18.1);
3) procedure modification: dielectric withstand voltage test (in 4.5.2.1); induced voltage test (in 4.5.2.2); capacitance unbalance (in 4.5.5.1);
4) Information to be stated modification: insulation resistance (in 4.5.2.4); excitation apparent-power measurements (in 4.5.3.4); stray-load losses (in 4.5.3.5); power factor (in 4.5.3.8); inherent self-resonance (in 4.5.8.1); parallel resonance and series resonance (in 4.5.8.3); transformer pulse response (in 4.5.11.3);
removed Annex D and Annex F in IEC 61007:2020.

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121 pages
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04-Aug-2026
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29.180
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IEC

IEC 62674-1:2026(Main)

High frequency inductive components - Part 1: Fixed surface mount inductors for use in electronic and telecommunication equipment

IEC 62674-1:2026 applies to fixed surface mount inductors and fixed surface mount ferrite beads. The object of this document is to define the terms necessary to describe the inductors covered by this document, provide recommendations for preferred characteristics, recommended performance, test methods and general guidance.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of dimensions for shape D;
b) addition of upper temperature for operating temperature ranges.

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15-Jul-2026
29.100.10
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IEC

IEC 62024-3:2026(Main)

High frequency inductive components - Electrical characteristics and measuring methods - Part 3: AC loss measured by sinusoidal wave of inductors for DC-to-DC converters

IEC 62024-3:2026 specifies test methods for AC losses of high-frequency inductive components for power supplies used in DC-to-DC converters and similar devices at currents close to actual operation and introduces the measurement principle, scope of application and matters to be noted for each method. This document is applicable to leaded and surface mount inductors with dimensions in accordance with IEC 62024-2.

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17 pages
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IEC

IEC 60205:2026(Main)

Calculation of the effective parameters of magnetic piece parts

IEC 60205:2026 specifies uniform rules for the calculation of the effective parameters of closed circuits of ferromagnetic material.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition, in 5.1, of the drawing and the formulae of pair of URS-cores of rectangular-circular section;
b) using, in 5.9, 5.10, 5.11 and 5.13, the conventional calculation formula that includes "B1‑D" is limited for the x-x cores (x is EL, ER, PQ or E) and addition new formulae for x‑PLT cores that replaces "B1-D" with "(B1-D+B2)/2";
c) addition, in 5.9, 5.10, 5.11 and 5.13, of formulae of l1 and l3 for x-PLT cores (x is EL, ER, PQ or E) which is different from the l1 and l3 of x-x cores;
d) addition of formula Amin in each subclause from 5.2.1 to 5.14.

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25-Mar-2026
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TC 51

IEC

IEC 63093-9:2026(Main)

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 9: Planar cores

IEC 63093-9:2026 specifies the shapes and dimensions of ferrite cores for inductive components (transformers and chokes), designed to employ coils that are made of multi-layer boards, or coils that are part of the motherboard, or flat conductor coils that are helically wound. This part also gives the effective parameter values used in magnetic calculations for such planar cores. In addition, this document gives guidelines on allowable limits of surface irregularities applicable for planar cores. This document is considered as a sectional specification useful in the negotiation between ferrite core suppliers and users about surface irregularities. The general consideration upon which the design of this range of cores is based is given in Annex A.
This edition includes the following significant technical changes with respect to the previous edition:
a) correction of some numbers in Table 2;
b) amendment of Table 6 following IEC 60205.

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30 pages
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60 pages
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IEC

IEC 63093-4:2026(Main)

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores

IEC 63093-4:2026 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of RM-cores and low-profile RM-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. It also gives guidance on allowable limits of surface irregularities applicable to RM-cores in accordance with the relevant generic specification. The selection of core sizes for this document 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. This document is a specification useful in the negotiations between ferrite core manufacturers and customers about surface irregularities. The general considerations that the design of this range of cores is based upon are given in Annex A.
This edition includes the following significant technical changes with respect to the previous edition:
a) revision of Table 3 and Table 4 according to IEC 60205 ED4.

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31 pages
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IEC

IEC 63093-10:2026(Main)

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 10: PM-cores and associated parts

IEC 63093-10:2026 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of PM-cores made of magnetic oxides, the main dimensions for coil formers to be used with these cores and the locations of their pins on a modular printed wiring grid in relation to the base outlines of cores. It also specifies the effective parameter values to be used in calculations and gives guidelines on allowable limits of surface irregularities applicable to the PM-cores. The use of derived standards which give more detailed specifications of component parts whilst still permitting compliance with this document is discussed in Annex A.
This edition includes the following significant technical changes with respect to the previous edition:
- revision of Table 2 according to IEC 60205 ED4.

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IEC 61332:2026(Main)

Soft ferrite material classification

IEC 61332:2026 specifies classification rules for soft ferrite materials used in inductive components (inductors and transformers) fulfilling the requirements of the electronic industries.
This document addresses the following issues for ferrite suppliers and users:
- cross-reference between materials from multiple suppliers;
- assistance to users in understanding the published technical data in catalogues when comparing multiple suppliers;
- guidance to users in selecting the most applicable material for each application;
- setting of nomenclature for IEC standards relating to ferrite;
- establishing uniformed benchmarks for manufacturers for performance in new development of materials.
The numerical values given in this document are typical values of the parameters (properties) of the related materials. Direct translation from the material specification into the core specification is not always easy or possible.
Every detailed material and core specification should be agreed upon between suppliers and users.
This edition includes the following significant technical changes with respect to the previous edition:
a) added PW2c and PW3c in subclasses PW2 and PW3 respectively in Table 3;
b) added the column of BS in Table 3;
c) added a smaller size of the test core (Ø 12,7 mm × Ø 7,5 mm × 7 mm) for higher measuring frequency (≥ 500 kHz) in Table 3.

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8 pages
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16 pages
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22-Jan-2026
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IEC 62358:2026(Main)

Ferrite cores - Standard inductance factor for gapped cores and its tolerance

IEC 62358:2026 provides standard AL values (inductance factors) and their tolerances of Pot, RM, ETD, E, EER, EP, PQ, PM, EC, EFD and low-profile gapped ferrite cores.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of AL value (inductance factor) and its tolerance for PM-cores;
b) addition of AL value (inductance factor) and its tolerance for EC-cores;
c) addition of AL value (inductance factor) and its tolerance for EFD-cores.

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IEC 63093-5:2025(Main)

Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 5: EP-cores and associated parts for use in inductors and transformers

IEC 63093-5:2025 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EP-cores made of ferrite, the essential dimensions of coil formers to be used with them and the locations of their terminal pins on a 2,50 mm printed wiring grid in relation to the base outlines of the 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 EP-cores. The specifications contained in this document are useful in negotiations between ferrite core suppliers and users about surface irregularities. The general considerations upon which the design of this range of cores is based are as given in Annex A.
This edition includes the following significant technical changes with respect to the previous edition:
a) revision of Table 2 according to IEC 60205:2016.

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15 pages
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31 pages
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14-Dec-2025
29.100.10
TC 51

General Information

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IEC 62044-2:2005/COR1:2021 - Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level Released:5/26/2021

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IEC 62044-2:2005/COR1:2021 - Corrigendum 1 - Cores made of soft magnetic materials - Measuring methods - Part 2: Magnetic properties at low excitation level Released:5/26/2021

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