prEN IEC 62024-2:2023

SLOVENSKI STANDARD
01-junij-2023
Visokofrekvenčne induktivne komponente - Električne karakteristike in merilne
metode - 2. del: Naznačeni tok tuljav za presmernik DC/DC
High frequency inductive components - Electrical characteristics and measuring methods
- Part 2: Rated current of inductors for DC-to-DC converters
Induktive Hochfrequenz-Bauelemente - Elektrische Eigenschaften und Messmethoden -
Teil 2: Bemessungsstrom von Drosselspulen für DC/DC-Wandler
Composants inductifs à haute fréquence - Caractéristiques électriques et méthodes de
mesure - Partie 2: Courant assigné des bobines d'induction pour des convertisseurs
continu-continu
Ta slovenski standard je istoveten z: prEN IEC 62024-2:2023
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

51/1435/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62024-2 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-04-21 2023-07-14
SUPERSEDES DOCUMENTS:
51/1409/CD, 51/1414/CC
IEC TC 51 : MAGNETIC COMPONENTS, FERRITE AND MAGNETIC POWDER MATERIALS
SECRETARIAT: SECRETARY:
Japan Mr Takeshi Abe
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of
• any relevant patent rights of which they are aware and to provide supporting documentation,
• any relevant “in some countries” clauses to be included should this proposal proceed. Recipients are reminded that
the enquiry stage is the final stage for submitting "in some countries" clauses. See AC/22/2007.

TITLE:
High frequency inductive components - Electrical characteristics and measuring methods - Part 2:
Rated current of inductors for DC-to-DC converters

PROPOSED STABILITY DATE: 2028
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 62024-2 © IEC 2023 2 51/1435/CDV

NOTE FROM TC/SC OFFICERS:
51/1435/CDV 3 IEC CDV 62024-2 © IEC 2023

1 CONTENTS
3 FOREWORD . 5
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms and definitions . 7
7 4 Standard atmospheric conditions . 7
8 4.1 Standard atmospheric conditions for testing . 7
9 4.2 Reference conditions . 8
10 5 Measuring method of DC saturation limited current . 8
11 5.1 General . 8
12 5.2 Test conditions . 8
13 5.3 Measuring circuit and calculation . 8
14 5.3.1 Measuring circuit . 8
15 5.3.2 Calculation . 9
16 5.4 Attachment jig of inductor . 9
17 5.5 Measuring method . 9
18 5.6 Quality conformance inspection . 10
19 6 Measuring method of temperature rise limited current. 10
20 6.1 General . 10
21 6.2 Test conditions . 10
22 6.3 Measuring jig . 10
23 6.3.1 General . 10
24 6.3.2 Printed-wiring board method . 11
25 6.3.3 Lead wire method . 18
26 6.4 Measuring method and calculation . 18
27 6.4.1 General . 18
28 6.4.2 Resistance substitution method . 19
29 6.4.3 Thermo-couple method . 20
30 6.4.4 Thermal Camera Method . 21
31 6.5 Quality conformance inspection . 22
32 7 Determination of rated current . 22
33 8 Information to be given in the detail specification . 22
34 8.1 General . 22
35 8.2 Measuring method of DC saturation limited current . 22
36 8.3 Measuring method of temperature rise limited current . 22
37 Annex A (informative) Example of recommended description on product specification
38 sheets and catalogues . 23
39 Bibliography . 24
41 Figure 1 – Inductance measuring circuit under application of DC saturation condition . 9
42 Figure 2 – Example of printed-wiring boards . 18
43 Figure 3 – Temperature rise measuring circuit by resistance substitution method . 19
44 Figure 4 – Temperature rise measuring circuit by thermo-couple method . 20
45 Figure 5 – Temperature rise measuring circuit by thermal camera method . 21
47 Table 1 – Width of circuits . 11

IEC CDV 62024-2 © IEC 2023 4 51/1435/CDV

48 Table 2 – Wire size of circuits . 18
51/1435/CDV 5 IEC CDV 62024-2 © IEC 2023

50 INTERNATIONAL ELECTROTECHNICAL COMMISSION
51 ____________
53 HIGH FREQUENCY INDUCTIVE COMPONENTS –
54 ELECTRICAL CHARACTERISTICS AND MEASURING METHODS –
56 Part 2: Rated current of inductors for DC-to-DC converters
58 FOREWORD
59 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
60 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
61 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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67 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
68 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
69 consensus of opinion on the relevant subjects since each technical committee has representation from all
70 interested IEC National Committees.
71 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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74 misinterpretation by any end user.
75 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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77 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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79 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
80 services carried out by independent certification bodies.
81 6) All users should ensure that they have the latest edition of this publication.
82 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
83 members of its technical committees and IEC National Committees for any personal injury, property damage or
84 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
85 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
86 Publications.
87 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
88 indispensable for the correct application of this publication.
89 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
90 rights. IEC shall not be held responsible for identifying any or all such patent rights.
91 IEC 62024-2 has been prepared by IEC technical committee 51: Magnetic components, ferrite
92 and magnetic powder materials.
93 This third edition cancels and replaces the second edition published in 2020. This edition
94 constitutes a technical revision.
95 This edition includes the following significant technical changes with respect to the previous
96 edition:
97 a) extension of scope by increase of range of rated current from 22 A to 125 A;
98 b) extension of scope by increase of footprint limitation from 12 mm X 12 mm to 625 mm ;
99 c) addition of upper current limitation for I , I and I board to Table 1;
CLASS B CLASS C CLASS D
100 d) revised application examples for Table 1;
101 e) addition of wire size references for current ranges between 22 A ≤ I ≤ 125 A to Table 2;
102 f) addition of crimp terminal references to Table 2;
103 g) addition of thermal camera method.

IEC CDV 62024-2 © IEC 2023 6 51/1435/CDV

104 The text of this international standard is based on the following documents:
FDIS Report on voting
51/xxxx/FDIS 51/xxxx/RVD
106 Full information on the voting for its approval can be found in the report on voting indicated in
107 the above table.
108 The language used for the development of this International Standard is English.
109 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
110 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
111 at https://www.iec.ch/members_experts/refdocs. The main document types developed by IEC
112 are described in greater detail at https://www.iec.ch/standardsdev/publications.
113 A list of all parts of IEC 62024 series, published under the general title High frequency inductive
114 components – Electrical characteristics and measuring methods can be found on the IEC
115 website.
116 The committee has decided that the contents of this document will remain unchanged until the
117 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
118 specific document. At this date, the document will be
119 • reconfirmed,
120 • withdrawn,
121 • replaced by a revised edition, or
122 • amended.
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