ISO 8820-3:2026

International
Standard
ISO 8820-3
Fifth edition
Road vehicles — Fuse-links —
2026-07
Part 3:
Fuse-links with tabs (blade type)
Type C (medium), Type E (high
current) and Type F (miniature)
Véhicules routiers — Liaisons fusibles —
Partie 3: Liaisons fusibles cavalier (Type à lame), Type C (moyen),
Type E (courant élevé) et Type F (miniature)
Reference number
© ISO 2026
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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 . 1
5 Tests and requirements . 2
5.1 General .2
5.1.1 Test criteria .2
5.1.2 Test sequence.6
5.2 Voltage drop .6
5.2.1 Tests .6
5.2.2 Requirement .7
5.3 Transient current cycling .8
5.3.1 Test . . .8
5.3.2 Requirement .9
5.4 Environmental conditions .9
5.5 Operating time-rating .9
5.5.1 Test . . .9
5.5.2 Requirement .9
5.6 Current steps .9
5.6.1 Test . . .9
5.6.2 Requirement .9
5.7 Breaking capacity .9
5.7.1 Test . . .9
5.7.2 Requirement .11
5.8 Strength of terminals.11
5.8.1 Test . . .11
5.8.2 Requirements . 12
5.9 Test cable sizes . 12
5.10 Temperature rise . 13
6 Dimensions . 14
6.1 Fuse-links Types C, E and F .14
6.2 Designation example .17
Annex A (informative)  Temperature rise test.18
Bibliography . 19

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.
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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 fifth edition cancels and replaces the fourth edition (ISO 8820-3:2015), which has been technically
revised.
The main changes are as follows:
— updated test fixture definitions and drawings (see 5.1.1);
— updated temperature limit on Temperature Rise Test (see Clause A.2);
— changed dimension b on type "C" fuse drawing from 3,0 min to 2,5 min (see 6.1).
A list of all parts in the ISO 8820 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 8820-3:2026(en)
Road vehicles — Fuse-links —
Part 3:
Fuse-links with tabs (blade type) Type C (medium), Type E
(high current) and Type F (miniature)
1 Scope
This document specifies fuse-links with tabs (blade-type) Type C (medium), Type E (high current) and
Type F (miniature) for use in road vehicles. It establishes the rated current, test procedures, performance
requirements and dimensions for these fuse-link types.
This document is applicable for fuse-links with a rated voltage of 32 V or 58 V, a current rating of ≤100 A and
a breaking capacity of 1 000 A intended for use in road vehicles.
[1]
This document is intended to be used in conjunction with ISO 8820-1 and ISO 8820-2 . The numbering of
its clauses corresponds to that of ISO 8820-1, whose requirements are applicable, except where modified by
requirements particular to this document.
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.
ISO 19642-3, Road vehicles — Automotive cables — Part 3: Dimensions and requirements for 30 V a.c. or 60 V
d.c. single core copper conductor cables
ISO 8820-1, Road vehicles — Fuse-links — Part 1: D
...