ISO 10924-3:2025

Road vehicles — Circuit breakers — Part 3: Miniature circuit breakers with tabs (Blade type), Form CB11

This document specifies miniature circuit breakers with tabs (blade-type), Form CB11 for use in road vehicles. It establishes, for this circuit breaker form, the rated current, test procedures, performance requirements and dimensions. This document is intended to be used in conjunction with ISO 10924-1 and ISO 10924-2. The numbering of its clauses corresponds to that of ISO 10924-1, whose requirements are applicable, except where modified by requirements particular to this document. This document is applicable to circuit breakers with a rated voltage of 14 V and/or 28 V, a current rating of ≤30 A and a breaking capacity of 2 000 A intended for use in road vehicles with a nominal voltage of 12 V and/or 24 V. The circuit breakers are different in dimensions and functions, such as electric reset, automatic reset, manual reset and switchable. NOTE This type of circuit breaker is intended to be used in similar applications as miniature fuse-links according to ISO 8820-3. While the tab dimensions and current ratings can be the same, there can be differences in performance which the user of these products is advised to consider.

Véhicules routiers — Coupe-circuits — Partie 3: Coupe-circuits miniatures avec languette (type languette), Forme CB11

General Information

• Status: Published
• Publication Date: 31-Mar-2025
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Current Stage: 6060 - International Standard published
• Start Date: 31-Mar-2025
• Due Date: 01-Apr-2025
• Completion Date: 01-Apr-2025

Relations

• Revises: ISO 10924-3:2015 - Road vehicles — Circuit breakers — Part 3: Miniature circuit breakers with tabs (Blade type), Form CB11
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 10924-3
Second edition
Road vehicles — Circuit breakers —
2025-03
Part 3:
Miniature circuit breakers with tabs
(Blade type), Form CB11
Véhicules routiers — Coupe-circuits —
Partie 3: Coupe-circuits miniatures avec languette (type
languette), Forme CB11
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking, labelling, and colour coding . 2
5 Tests and requirements . 2
5.1 General .2
5.1.1 General test conditions .2
5.1.2 Test sequence plan .2
5.1.3 Test cable sizes .3
5.2 Voltage drop .4
5.2.1 Purpose .4
5.2.2 Tests .4
5.2.3 Requirements .4
5.3 Maximum housing temperature .4
5.4 Environmental conditions .4
5.5 Operating time-rating .4
5.5.1 Purpose .4
5.5.2 Tests .4
5.5.3 Requirements .4
5.6 Current steps .5
5.7 No current trip and reset temperature .5
5.8 Absolute breaking capacity .5
5.8.1 Purpose .5
5.8.2 Tests .5
5.8.3 Requirements .5
5.9 Breaking capacity .5
5.9.1 Purpose .5
5.9.2 Tests .5
5.9.3 Requirements .6
5.10 Strength of terminals.6
5.11 Endurance .6
5.11.1 Purpose .6
5.11.2 Tests .6
5.11.3 Requirements .6
5.12 Dielectric strength .7
5.12.1 Purpose .7
5.12.2 Tests .7
5.12.3 Requirement .7
6 Dimensions and designation examples . 7
6.1 Dimensions .7
6.2 Designation examples .8
6.2.1 Category B .8
6.2.2 Category C .9
6.2.3 Category D .9
6.2.4 Category F and G .10
6.2.5 Category H .11

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This second edition cancels and replaces the first edition (ISO 10924-3:2015), which has been technically
revised.
The main changes are as follows:
— in Table 2, the test sequence plans were modified for tests No 1, 7, 14, 15 and 19;
— the voltage test at 5.2.2 has been split into fast and standard versions of the circuit breaker;
— the tests for dielectric strength in 5.12.1 and the requirements in 5.12.2 have been clarified.
A list of all parts in the ISO 10924 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 10924-3:2025(en)
Road vehicles — Circuit breakers —
Part 3:
Miniature circuit breakers with tabs (Blade type), Form CB11
1 Scope
This document specifies miniature circuit breakers with tabs (blade-type), Form CB11 for use in road
vehicles. It establishes, for this circuit breaker form, the rated current, test procedures, performance
requirements and dimensions.
This document is intended to be used in conjunction with ISO 10924-1 and ISO 10924-2. The numbering of
its clauses corresponds to that of ISO 10924-1, whose requirements are applicable, except where modified
by requirements particular to this document.
This document is applicable to circuit breakers with a rated voltage of 14 V and/or 28
...