ISO 20934:2019

Road vehicles — Fuse-links with axial terminals for use in 48V networks — Types SF36-70V, SF51-70V and SF56-70V

This document specifies fuse-links with axial terminals (Strip fuse-links) Types SF36‑70V, SF51‑70V and SF56‑70V used in road vehicles. It establishes, for these fuse-link types, the rated current, test procedures, performance requirements, and dimensions. This document is applicable to fuse-links with a rated voltage of 70 V DC, a rated current of 30 A to 500 A, and a breaking capacity of 2 500 A intended for use in the electrical system of road vehicles with a nominal voltage of 48 V DC. This document 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 document.

Véhicules routiers — Liaisons fusibles avec languettes axiales pour réseaux 48V — Types SF36-70V, SF51-70V et SF56-70V

General Information

• Status: Published
• Publication Date: 31-Mar-2019
• 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/WG 5 - Fuses and circuit breakers
• Current Stage: 9060 - Close of review
• Start Date: 02-Dec-2029

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20934
First edition
2019-04
Road vehicles — Fuse-links with
axial terminals for use in 48V
networks — Types SF36-70V, SF51-
70V and SF56-70V
Véhicules routiers — Liaisons fusibles avec languettes axiales pour
réseaux 48V — Types SF36-70V, SF51-70V et SF56-70V
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking, labelling and colour coding . 1
5 Design and test requirements . 2
5.1 General . 2
5.1.1 General test conditions . 2
5.1.2 General performance requirements . 2
5.1.3 General fuse-link requirements . 3
5.1.4 Test sequence . . . 3
5.1.5 Test cable size . 4
5.2 Voltage drop . 4
5.2.1 Purpose . 4
5.2.2 Test . 4
5.2.3 Requirement . 4
5.3 Current cycling . 5
5.3.1 Purpose . 5
5.3.2 Test . 5
5.3.3 Requirement . 6
5.4 Environmental conditions . 6
5.4.1 Purpose . 6
5.4.2 Mechanical Shock and Vibration test . 6
5.4.3 Climatic loads. 7
5.4.4 Chemical loads . 7
5.4.5 Temperature shock . 7
5.4.6 Requirement . 7
5.5 Operating time rating . 7
5.5.1 Purpose . 7
5.5.2 Test . 7
5.5.3 Requirement . 7
5.6 Current steps . 8
5.6.1 Purpose . 8
5.6.2 Test . 8
5.6.3 Requirement . 8
5.7 Breaking capacity . 8
5.7.1 Purpose . 8
5.7.2 Test . 8
5.7.3 Requirement . 9
5.8 Mechanical stability . 9
5.8.1 Purpose . 9
5.8.2 Test . 9
5.8.3 Requirement . 9
5.9 Insulation resistance . 9
5.9.1 Purpose . 9
5.9.2 Test . 9
5.9.3 Requirement . 9
5.10 Cold resistance .10
5.10.1 Purpose .10
5.10.2 Test .10
5.10.3 Requirement .11
5.11 Overload test .11
5.11.1 Purpose .11
5.11.2 Test .11
5.11.3 Requirement .11
6 Dimensions and examples of designation .11
6.1 Type SF36-70V .11
6.1.1 Dimensions bolt-down .11
6.1.2 Dimensions clinchable .12
6.2 Type SF51-70V .13
6.3 Type SF56-70V .14
6.4 Designation example .15
7 Test fixture .15
7.1 SF36-70V .15
7.2 SF51-70V .16
7.3 SF56-70V .16
Annex A (informative) Optional tests .18
Bibliography .20
iv © ISO 2019 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). Th
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