ISO 8820-4:2010

INTERNATIONAL ISO
STANDARD 8820-4
Second edition
2010-12-15

Road vehicles — Fuse-links —
Part 4:
Fuse-links with female contacts (type A)
and bolt-in contacts (type B) and their
test fixtures
Véhicules routiers — Liaisons fusibles —
Partie 4: Liaisons fusibles avec contacts femelles (type A) et contacts
boulonnés (type B) et leurs montages d'essai




Reference number
ISO 8820-4:2010(E)
©
ISO 2010

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ISO 8820-4:2010(E)
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ii © ISO 2010 – All rights reserved

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ISO 8820-4:2010(E)
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
5.2 Test sequence.4
5.3 Test cable sizes .4
5.4 Voltage drop.5
5.5 Transient current cycling.6
5.6 Environmental condition .6
5.7 Operating time-rating.6
5.8 Current steps .7
5.9 Breaking capacity.7
5.10 Strength of terminals .7
5.11 Temperature rise .8
5.12 Rapid change of temperature with specified transition duration.9
6 Dimensions .9
6.1 Fuse-links types A1, A2 and A3 .9
6.2 Fuse-links type A1S .10
6.3 Fuse-links types B1 and B2.11
6.4 Designation .12
7 Test fixtures .13
7.1 Test fixture for fuse-links types A1, A1S, A2 and A3.13
7.2 Test fixture for fuse-links type B1 .14
7.3 Test fixture for fuse-links type B2 .15
Annex A (informative) Tab dimensions for fuse-boxes .16

© ISO 2010 – All rights reserved iii

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ISO 8820-4:2010(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8820-4 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical
and electronic equipment.
This second edition cancels and replaces the first edition (ISO 8820-4:2002), which has been technically
revised.
ISO 8820 consists of the following parts, under the general title Road vehicles — Fuse-links:
⎯ Part 1: Definitions and general test requirements
⎯ Part 2: User's guide
⎯ Part 3: Fuse-link with tabs (blade type) Type C (medium), Type E (high current) and Type F (miniature)
⎯ Part 4: Fuse-links with female contacts (type A) and bolt-in contacts (type B) and their test fixtures
⎯ Part 5: Fuse-links with axial terminals (Strip fuse-links) Types SF30 and SF51 and test fixtures
⎯ Part 6: Single-bolt fuse-links
⎯ Part 7: Fuse-links with tabs (Type G) with rated voltage of 450 V

iv © ISO 2010 – All rights reserved

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INTERNATIONAL STANDARD ISO 8820-4:2010(E)

Road vehicles — Fuse-links —
Part 4:
Fuse-links with female contacts (type A) and bolt-in contacts
(type B) and their test fixtures
1 Scope
This part of ISO 8820 specifies fuse-links with female contacts (type A) and bolt-in contacts (type B) for use in
road vehicles. It establishes, for these fuse-link types, the rated current, test procedures, performance
requirements and dimensions.
This part of ISO 8820 is applicable to fuse-links with a rated voltage of 32 V or 58 V, a current rating u 140 A
and a breaking capacity of 1 000 A intended for road vehicles.
This part of ISO 8820 is intended to be used in conjunction with ISO 8820-1 and with 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 part of ISO 8820.
2 Normative references
The following referenced documents are indispensable for the application 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 6722, Road vehicles — 60 V and 600 V single-core cables — Dimensions, test methods and
requirements
ISO 8820-1, Road vehicles — Fuse-links — Part 1: Definitions and general test requirements
ISO 16750-4, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 4: Climatic load
3 Terms and definitions
For the purposes of this document, the terms and definitions given in 8820-1 apply.
© ISO 2010 – All rights reserved 1

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ISO 8820-4:2010(E)
4 Marking, labelling and colour coding
See ISO 8820-1 and Table 1.
Table 1 — Fuse-link colour coding
Fuse rating
Colour
A
20 Light blue
25 White
30 Pink
35 Dark green
40 Green
50 Red
60 Yellow
70 Brown
80 Black
100 Blue
120 White
140 Red-brown
5 Tests and requirements
5.1 General
In addition to carrying out the test procedures in accordance with ISO 8820-1 the following criteria shall be
observed:
Tests shall be performed following the test sequences in Table 2.
The test fixtures for electrical tests (see Annex A) shall be designed in accordance with Figure 1. The
connection resistance shall be for type A u 1,0 mΩ and for type B u 0,35 mΩ to ensure the proper functioning
of the test fixture.
Fuse-l
...