IEC 62024-2:2024
(Main)High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC-to-DC converters
High frequency inductive components - Electrical characteristics and measuring methods - Part 2: Rated current of inductors for DC-to-DC converters
IEC 62024-2:2024 specifies the measuring methods of the rated DC limits for inductors as defined below. Standardized measuring methods for the determination of ratings enable users to accurately compare the current ratings given in various manufacturers' data books. This document is applicable to leaded and surface mount inductors with dimensions according to IEC 62025-1 and generally with rated current less than 125 A, although inductors with rated current greater than 125 A are available that fall within the dimension restrictions of this document (no larger than a 625 mm2 footprint). These inductors are typically used in DC‑to‑DC converters built on printed circuit boards (PCBs), for electronic and telecommunication equipment, and small size switching power supply units. The measuring methods are defined by the saturation and temperature rise limitations induced solely by direct current (DC).
This edition includes the following significant technical changes with respect to the previous edition:
a) extension of scope by increase of range of rated current from 22 A to 125 A;
b) extension of scope by increase of footprint limitation from 12 mm × 12 mm to 625 mm2;
c) addition of upper current limitation for Iclass B, Iclass C and Iclass D board to Table 1;
d) revised application examples for Table 1;
e) addition of wire size references for current ranges between 22 A ≤ I ≤ 125 A to Table 2;
f) addition of crimp terminal references to Table 2;
g) addition of thermal camera method.
Composants inductifs à haute fréquence - Caractéristiques électriques et méthodes de mesure - Part 2: Courant assigné des bobines d'inductance pour les convertisseurs continu-continu
L'IEC 62024-2:2024 spécifie les méthodes de mesure des limites de courant continu assigné pour les bobines d'inductance, définies ci-après. Les méthodes de mesure normalisées pour la détermination des caractéristiques assignées permettent aux utilisateurs de comparer avec exactitude les caractéristiques assignées de courant indiquées dans les fiches de données des différents fabricants. Le présent document s'applique aux bobines d'inductance plombées et à montage en surface dont les dimensions sont conformes à l'IEC 62025-1 et dont le courant assigné est généralement inférieur à 125 A, même si des bobines d'inductance de courant assigné supérieur à 125 A sont disponibles et respectent les limites de dimensions du présent document (empreinte inférieure ou égale à 625 mm2). Ces bobines d'inductance sont habituellement utilisées dans des convertisseurs continu-continu montés sur des cartes à circuit imprimé (PCB, printed circuit boards), pour des équipements électroniques et de télécommunications, ainsi que pour les blocs d'alimentation à découpage de petite taille. Les méthodes de mesure sont définies par les limites de saturation et d'échauffement induites par le courant continu (DC) uniquement.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le domaine d'application a été élargi en portant la plage du courant assigné de 22 A à 125 A;
b) le domaine d'application a été élargi en portant les limites de l'empreinte de 12 mm × 12 mm à 625 mm2;
c) une limite haute de courant a été ajoutée pour les cartes Iclasse B, Iclasse C et Iclasse D dans le Tableau 1;
d) les exemples d'application ont été révisés pour le Tableau 1;
e) des tailles de fils de référence ont été ajoutées pour les courants d'intensité 22 A ≤ I ≤ 125 A dans le Tableau 2;
f) des bornes à sertir de référence ont été ajoutées dans le Tableau 2;
g) la méthode par caméra thermique a été ajoutée.
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IEC 62024-2 ®
Edition 3.0 2024-12
REDLINE VERSION
INTERNATIONAL
STANDARD
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High frequency inductive components – Electrical characteristics and measuring
methods –
Part 2: Rated current of inductors for DC-to-DC converters
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IEC 62024-2 ®
Edition 3.0 2024-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
High frequency inductive components – Electrical characteristics and
measuring methods –
Part 2: Rated current of inductors for DC-to-DC converters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8327-0120-1
– 2 – IEC 62024-2:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Standard atmospheric conditions . 7
4.1 Standard atmospheric conditions for testing . 7
4.2 Reference conditions . 7
5 Measuring method of direct saturation limited current (DC) . 7
5.1 General . 7
5.2 Test conditions . 7
5.3 Measuring circuit and calculation . 8
5.3.1 Measuring circuit . 8
5.3.2 Calculation . 9
5.4 Attachment jig of inductor . 9
5.5 Measuring method . 9
5.6 Quality conformance inspection . 10
6 Measuring method of temperature rise limited current. 10
6.1 General . 10
6.2 Test conditions . 10
6.3 Measuring jig . 10
6.3.1 General . 10
6.3.2 Printed-wiring board method . 11
6.3.3 Lead wire method . 21
6.4 Measuring method and calculation . 22
6.4.1 General . 22
6.4.2 Resistance substitution method . 22
6.4.3 Thermocouple method . 23
6.4.4 Thermal camera method . 24
6.5 Quality conformance inspection . 26
7 Determination of rated current . 26
8 Information to be given in the detail specification . 26
8.1 General . 26
8.2 Measuring method of direct saturation limited current (DC) . 26
8.3 Measuring method of temperature rise limited current . 26
Annex A (informative) Example of recommended description on product specification
sheets and catalogues . 27
Bibliography . 28
Figure 1 – Inductance measuring circuit under application of DC saturation condition . 8
Figure 2 – Example of printed-wiring boards . 21
Figure 3 – Temperature rise measuring circuit by resistance substitution method . 22
Figure 4 – Temperature rise measuring circuit by thermocouple method . 23
Figure 5 – Temperature rise measuring circuit by thermal camera method . 25
Table 1 – Width of circuits . 11
Table 2 – Circuit pattern width and thickness .
Table 2 – Wire size of circuits . 21
– 4 – IEC 62024-2:2024 RLV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH FREQUENCY INDUCTIVE COMPONENTS –
ELECTRICAL CHARACTERISTICS AND MEASURING METHODS –
Part 2: Rated current of inductors for DC-to-DC converters
FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 62024-2:2008. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
International Standard IEC 62024-2 has been prepared IEC technical committee 51: Magnetic
components, ferrite and magnetic powder materials.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of Table 2 and Figure 2 b).
The text of this International Standard is based on the following documents:
CDV Report on voting
51/1303/CDV 51/1325/RVC
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 document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 62024 series, published under the general title High frequency inductive
components – Electrical characteristics and measuring methods can be found on the IEC
website.
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,
• withdrawn,
• replaced by a revised edition, or
• amended.
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– 6 – IEC 62024-2:2024 RLV © IEC 2024
HIGH FREQUENCY INDUCTIVE COMPONENTS –
ELECTRICAL CHARACTERISTICS AND MEASURING METHODS –
Part 2: Rated current of inductors for DC-to-DC converters
1 Scope
This part of IEC 62024 specifies the measuring methods of the rated DC limits for small
inductors as defined below.
Standardized measuring methods for the determination of ratings enable users to accurately
compare the current ratings given in various manufacturers' data books.
This document is applicable to leaded and surface mount inductors with dimen
...
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