IEC 63299:2022
(Main)Classification of magnetic powder cores
Classification of magnetic powder cores
IEC 63299:2022 specifies classification rules for metallic magnetic powder cores used in inductive components fulfilling the requirements of the electronics industries. This document addresses the following objectives for magnetic powder cores suppliers and users:
- cross-reference between core 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 core for each application;
- establishing uniform benchmarks for suppliers for performance in the new development of core material.
Classification des noyaux en poudre magnétique
L'IEC 63299:2022 spécifie les règles de classification des noyaux en poudre magnétique métallique utilisés dans les composants inductifs qui satisfont aux exigences de l'industrie électronique. Le présent document répond aux objectifs suivants pour les fournisseurs et les utilisateurs de noyaux en poudre magnétique:
- établir une référence croisée entre les noyaux de plusieurs fournisseurs;
- fournir un appui aux utilisateurs afin de les aider à comprendre les données techniques publiées dans les catalogues lors de la comparaison de plusieurs fournisseurs;
- fournir des recommandations aux utilisateurs concernant le choix du noyau le plus approprié pour chaque application;
- établir des références uniformes pour les fournisseurs en ce qui concerne les performances dans le cadre du développement de nouveaux noyaux.
General Information
Standards Content (Sample)
IEC 63299
®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of magnetic powder cores
Classification des noyaux en poudre magnétique
IEC 63299:2022-09(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63299
®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of magnetic powder cores
Classification des noyaux en poudre magnétique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.030; 29.100.10 ISBN 978-2-8322-5704-3
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63299:2022 © IEC 2022
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification . 6
4.1 General . 6
4.2 Iron powder core materials . 6
4.2.1 Chemical composition . 6
4.2.2 Characteristics. 6
4.3 Iron-silicon powder core materials . 7
4.3.1 Chemical composition . 7
4.3.2 Characteristics. 7
4.4 Iron-silicon-aluminum powder core materials. 8
4.4.1 Chemical composition . 8
4.4.2 Characteristics. 8
4.5 Iron-nickel powder core materials . 8
4.5.1 Chemical composition . 8
4.5.2 Characteristics. 8
4.6 Iron-nickel-molybdenum powder core materials . 9
4.6.1 Chemical composition . 9
4.6.2 Characteristics. 9
4.7 Iron-based amorphous powder core materials . 10
4.7.1 Chemical composition . 10
4.7.2 Characteristics. 10
4.8 Iron-based nanocrystalline powder core materials . 11
4.8.1 Chemical composition . 11
4.8.2 Characteristics. 11
Table 1 – Typical magnetic properties of iron powder core materials . 7
Table 2 – Typical magnetic properties of iron-silicon powder core materials . 7
Table 3 – Typical magnetic properties of iron-silicon-aluminum powder core materials . 8
Table 4 – Typical magnetic properties of iron-nickel powder core materials . 9
Table 5 – Typical magnetic properties of iron-nickel-molybdenum powder core
materials . 10
Table 6 – Typical magnetic properties of iron-based amorphous powder core materials . 11
Table 7 – Typical magnetic properties of iron-based nanocrystalline powder core
materials . 11
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IEC 63299:2022 © IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CLASSIFICATION OF MAGNETIC POWDER CORES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 63299 has been prepared by IEC technical committee 51: Magnetic components, ferrite
and magnetic powder materials. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
51/1403/CDV 51/1413/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
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– 4 – IEC 63299:2022 © IEC 2022
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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IEC 63299:2022 © IEC 2022 – 5 –
CLASSIFICATION OF MAGNETIC POWDER CORES
1 Scope
This document specifies classification rules for metallic magnetic powder cores used in
inductive components fulfilling the requirements of the electronics industries.
This document addresses the following objectives for magnetic powder cores suppliers and
users:
– cross-reference between core 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 core for each application;
– establishing uniform benchmarks for suppliers for performance in the new development of
core material.
The numerical values given in this document are typical values of parameters of the related
material. Direct translation from the material specification into the core specification is not
always easy or possible.
Every detailed material and core specification will be agreed upon between the user and the
supplier.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-221, International Electrotechnical Vocabulary (IEV) – Part 221: Magnetic materials
and components
IEC 60404-1, Magnetic materials – Part 1: Classification
1
IEC 63300 , Test methods for electrical and magnetic properties of magnetic powder cores
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-221,
IEC 60404-1 and IEC 63300 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
1
Under preparation. Stage at the time of publication: IEC CDV 63300:2022.
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– 6 – IEC 63299:2022 © IEC 2022
4 Classification
4.1 General
Magnetic powder cores consist of a basic metallic soft magnetic powder and inorganic or
organic electrically insulating additives and binders. The magnetic powder core materials can
be divided into some main classes according to the composition and crystal structure of metallic
magnetic powder. The relevant main classes are pure iron (Fe) powder, iron-silicon (Fe-Si)
powder, iron-silicon-aluminium (Fe-Si-Al) powder, iron-nickel (Fe-Ni) powder, iron-nickel-
molybdenum (Fe-Ni-Mo) powder, iron-based amorphous powder (typically Fe-Si-B), and iron-
based nanocrystalline (typically Fe-Si-B-Cu-Nb) powder.
The subclassification of powder cores of each material is based on their (effective) initial
permeability.
A 060
Permeability code, e.g. 060 for permeability μ = 60
Powder composition code, I, K, S, H, M, A and N
I: Fe
K: Fe-Si
S: Fe-Si-Al
H: Fe-Ni
M: Fe-Ni-Mo
A: Iron-based amorphous material
N: Iron-based nanocrystalline material
Magnetic powder core materials are mainly used for inductive components. The shapes
produced include rings, blocks, cylinders, ellipses, E types, EQ types, EER types, U types and
pot types. The shape and dimension of the cores shall be determined in the detailed
specification.
4.2 Iron powder core materials
4.2.1 Chemical composition
Iron powder cores consist of basic pure iron powder and inorganic or organic electrically
insulating additives and binders.
4.2.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron powder core materials are given in Table 1.
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IEC 63299:2022 © IEC 2022 – 7 –
Table 1 – Typical magnetic properties of iron powder core materials
a
Magnetic flux Power loss
DC-bias characteristic
density at density at
at f = 10 kHz, B ≤ 0,5 mT
Initial
f = 50 kHz,
f = 50 Hz,
Subclasses
%
permeability
B = 25 mT
H = 20 kA/m
H = 8 kA/m H = 16 kA/m
3
T
kW/m
I 010 10 × (1 ± 10 %) ≥ 0,26 - ≥ 85 ≤ 40
I 035 35 × (1 ± 10 %) ≥ 0,78 - ≥ 50 ≤ 70
I 055 55 × (1 ± 10 %) ≥ 1,03 ≥ 43 - ≤ 100
I 060 60 × (1 ± 10 %) ≥ 1,30 ≥ 40 - ≤ 150
I 075 75 × (1 ± 10 %) ≥ 1,30 ≥ 25 - ≤ 150
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300.The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,5 mm × 11,1 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
4.3 Iron-silicon powder core materials
4.3.1 Chemical composition
Iron-silicon powder cores consist of basic iron-silicon powder and inorganic or organic
electrically insulating additives and binders.
4.3.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-silicon powder core materials are given in Table 2.
Table 2 – Typical magnetic properties of iron-silicon powder core materials
a
Magnetic
DC-bias characteristic
Power loss density
flux density
at f = 10 kHz, B ≤ 0,5 mT
at
3
kW/m
Initial
Subclasses %
f = 50 Hz,
permeability
H = 20 kA/m f = 100 kHz, f = 500 kHz,
H = 8 kA/m H = 16 kA/m
B = 100 mT B = 20 mT
T
K 026 26 × (1 ± 8 %) ≥ 0,62 - ≥ 75 ≤ 2200 ≤ 420
K 040 40 × (1 ± 8 %) ≥ 0,80 - ≥ 63 ≤ 1900 ≤ 400
K 060 60 × (1 ± 8 %) ≥ 1,03 ≥ 67 - ≤ 1700 ≤ 400
K 075 75 × (1 ± 8 %) ≥ 1,10 ≥ 54 - ≤ 1700 ≤ 420
K 090 90 × (1 ± 8 %) ≥ 1,16 ≥ 44 - ≤ 1900 ≤ 450
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300.The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
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– 8 – IEC 63299:2022 © IEC 2022
4.4 Iron-silicon-aluminum powder core materials
4.4.1 Chemical composition
Iron-silicon-aluminum powder cores consist of basic iron-silicon-aluminum powder and
inorganic or organic electrically insulating additives and binders.
4.4.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-silicon-aluminum powder core materials are given in
Table 3.
Table 3 – Typical magnetic properties of iron-silicon-aluminum powder core materials
a
Magnetic DC-bias characteristic
Power loss density
flux
at f = 10 kHz, B ≤ 0,5 mT
density at
3
kW/m
Initial
f = 50 Hz,
Subclasses %
permeability
H = 20
kA/m f = 100 kHz, f = 500 kHz,
H = H = H =
4 kA/m 8 kA/m 16 kA/m
T B = 100 mT B = 20 mT
S 026 26 × (1 ± 8 %) ≥ 0,43 - - ≥ 48 ≤ 1000 ≤ 230
S 060 ≥ 0,71 - ≥ 43 - ≤ 750 ≤ 230
60 × (1 ± 8 %)
S 075 75 × (1 ± 8 %) ≥ 0,77 ≥ 58 - - ≤ 750 ≤ 230
S 090 90 × (1 ± 8 %) ≥ 0,79 ≥ 51 - - ≤ 800 ≤ 260
S 125 ≥ 0,85 ≥ 38 - - ≤ 800 ≤ 260
125 × (1 ± 8 %)
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300. The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
4.5 Iron-nickel powder core materials
4.5.1 Chemical composition
Iron-nickel powder cores consist of basic nickel-iron powder and inorganic or organic electrically
insulating additives and binders.
NOTE These materials are known in the industry as "high flux".
4.5.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-nickel powder core materials are given in Table 4.
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IEC 63299:2022 © IEC 2022 – 9 –
Table 4 – Typical magnetic properties of iron-nickel powder core materials
a
DC-bias characteristic
Power loss density
Magnetic
at f = 10 kHz, B ≤ 0,5 mT
flux density
3
kW/m
Initial
at f = 50 Hz,
Subclasses %
permeability
H = 20 kA/m
f = 100 kHz, f = 500 kHz,
H = H = H =
T
5 kA/m 8 kA/m 16 kA/m
B = 100 mT B = 20 mT
H 026 26 × (1 ± 8 %) ≥ 0,55 - - ≥ 75 ≤ 1100 ≤ 300
H 060 60 × (1 ± 8 %) ≥ 0,87 - ≥ 70 - ≤ 800 ≤ 300
H 125 ≥ 1,19 ≥ 47 - - ≤ 850 ≤ 320
125 × (1 ± 8 %)
H 147 147 × (1 ± 8 %) ≥ 1,19 ≥ 50 - - ≤ 900 ≤ 350
H 160 160 × (1 ± 8 %) ≥ 1,19 ≥ 43 - - ≤ 1100 ≤ 380
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300. The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
4.6 Iron-nickel-molybdenum powder core materials
4.6.1 Chemical composition
Iron-nickel-molybdenum powder cores consist of basic iron-nickel-molybdenum powder and
inorganic or organic electrically insulating additives and binders.
NOTE These materials are known in the industry as "MPP" (molypermalloy powder).
4.6.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-nickel-molybdenum powder core materials are given in
Table 5.
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– 10 – IEC 63299:2022 © IEC 2022
Table 5 – Typical magnetic properties of iron-nickel-molybdenum
powder core materials
a
DC-bias characteristic
Magnetic
Power loss density
flux density at f = 10 kHz, B ≤ 0,5 mT
3
Initial kW/m
at f = 50 Hz,
Subclasses
%
permeability
H = 20 kA/m
H = H = H = H = f = 100 kHz, f = 500 kHz,
T
3 kA/m 4 kA/m 8 kA/m 16 kA/m B = 100 mT B = 20 mT
M 026 26 × (1 ± 8 %) ≥ 0,51 - - - ≥ 57 ≤ 800 ≤ 220
M 060 60 × (1 ± 8 %) ≥ 0,65 - ≥ 48 - ≤ 700 ≤ 210
M 125 125 × (1 ± 8 %) ≥ 0,65 - ≥ 50 - - ≤ 800 ≤ 210
M 147 147 × (1 ± 8 %) ≥ 0,65 ≥ 57 - - - ≤ 850 ≤ 230
M 160 160 × (1 ± 8 %) ≥ 0,65 ≥ 52 - - - ≤ 900 ≤ 260
M 173 173 × (1 ± 8 %) ≥ 0,65 ≥ 48 - - - ≤ 1100 ≤ 300
M 200 200 × (1 ± 8 %) ≥ 0,65 ≥ 43 - - ≤ 1300 ≤ 350
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300.The specimens
are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
4.7 Iron-based amorphous powder core materials
4.7.1 Chemical composition
Iron-based amorphous powder cores consist of basic iron-based amorphous powder and
inorganic or organic electrically insulating additives and binders. A typical composition example
for amorphous powder is iron-silicon-boron, and other compositions are acceptable if the
magnetic property requirements in this document are satisfied.
4.7.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-based amorphous powder core materials are given in
Table 6.
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IEC 63299:2022 © IEC 2022 – 11 –
Table 6 – Typical magnetic properties of iron-based
amorphous powder core materials
DC-bias Power loss density
Magnetic flux
a
characteristic
3
density at
kW/m
at f = 10 kHz,
Initial
f = 50 Hz,
Subclasses
B ≤ 0,5 mT,
permeability
f = 100 kHz, f = 500 kHz,
H = 20 kA/m
H = 8 kA/m
B = 100 mT B = 20 mT
T
%
A 060 60 × (1 ± 8 %) ≥ 0,81 ≥ 55 ≤ 950 ≤ 290
A 075 75 × (1 ± 8 %) ≥ 0,85 ≥ 45 ≤ 650 ≤ 280
A 090 90 × (1 ± 8 %) ≥ 0,92 ≥ 40 ≤ 800 ≤ 240
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300.The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2 mm.
a
DC bias characteristic is defined as the ratio of the initial permeability of a magnetic powder core with DC bias
magnetic field to that without DC bias magnetic field.
4.8 Iron-based nanocrystalline powder core materials
4.8.1 Chemical composition
Iron-based nanocrystalline powder cores consist of basic iron-based nanocrystalline powder
and inorganic or organic electrically insulating additives and binders. A typical composition
example for nanocrystalline powder is iron-silicon-boron-copper-niobium, and other
compositions are acceptable if the magnetic property requirements in this document are
satisfied.
4.8.2 Characteristics
A more complete definition of this material can be based on the following characteristics:
– magnetic: initial permeability, saturation magnetic flux density, DC-bias characteristic,
power loss density, temperature coefficient of permeability;
– other: density, mechanical strength, thermal conductivity.
The typical magnetic properties of iron-based nanocrystalline powder core materials are given
in Table 7.
Table 7 – Typical magnetic properties of iron-based
nanocrystalline powder core materials
DC-bias Power loss density
Magnetic flux
a
characteristic
3
density at
kW/m
at f = 10 kHz,
Initial
f = 50 Hz,
Subclasses
B ≤ 0,5 mT,
permeability
f = 100 kHz, f = 500 kHz,
H = 20 kA/m
H = 8 kA/m
B = 100 mT B = 20 mT
T
%
N 060 60 × (1 ± 8 %) ≥ 0,78 ≥ 50 ≤ 600 ≤ 230
NOTE The measuring methods for the main magnetic properties are in accordance with IEC 63300. The
specimens are ring-cores whose dimensions are Ø 26,9 mm × Ø 14,7 mm × 11,2
...
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