IEC 60127-7:2013

IEC 60127-7 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 7: Miniature fuse-links for special applications

Coupe-circuits miniatures –
Partie 7: Eléments de remplacement miniatures pour applications spéciales

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IEC 60127-7 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 7: Miniature fuse-links for special applications

Coupe-circuits miniatures –
Partie 7: Eléments de remplacement miniatures pour applications spéciales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 29.120.50 ISBN 978-2-83220-670-6

– 2 – 60127-7  IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 7
5 Standard ratings . 8
6 Marking . 8
7 General notes on tests . 9
8 Dimensions and construction . 12
9 Electrical requirements . 13
9.1 Voltage drop . 13
9.2 Time/current characteristic . 13
9.2.1 Time/current characteristic at normal ambient temperature . 13
9.2.2 Test at elevated temperature . 13
9.3 Breaking capacity . 13
9.3.1 Operating conditions . 13
9.3.2 Criteria for satisfactory performance . 15
9.4 Endurance tests . 15
9.4.101 Endurance test at normal ambient temperature . 16
9.4.102 Test method A . 16
9.4.103 Test method B . 16
9.5 Maximum sustained dissipation . 16
9.6 Pulse tests . 16
9.7 Fuse-link temperature . 16
9.7.101 Fuse-links for use on printed circuit boards . 16
9.7.102 Fuse-links for use in fuse-holders . 17
Annex AA (informative) Guidance on ratings to be specified by the manufacturer or to
be agreed upon with the testing house . 23

Figure 1 – Standard test board . 10
Figure 2 – Standard test base for printed circuit board . 11
Figure 3 – Test circuits for breaking capacity tests . 14

Table 1 – Power factor and time constant . 15
Table 2 – Testing schedule for a.c. or d.c. breaking capacity fuse-links . 18
Table 3 – Testing schedule for a.c. and d.c. breaking capacity fuse-links . 19

60127-7  IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 7: Miniature fuse-links for special applications

FOREWORD
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International Standard IEC 60127-7 has been prepared by subcommittee 32C: Miniature fuses,
of IEC technical committee 32: Fuses.
The text of this standard is based on the following documents:
CDV Report on voting
32C/458/CDV 32C/467/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 60127-1:2006, Miniature
fuses – Part 1: Definitions for miniature fuses and general requirements for miniature fuse-
links and its Amendment 1 (2011).

– 4 – 60127-7  IEC:2013
The clauses of this standard supplement, modify or replace the corresponding clauses in
IEC 60127-1.
Where there is no corresponding clause or subclause in this standard, the clause or
subclause of IEC 60127-1 applies without modification as far as is reasonable. When this
standard states “addition” or “replacement”, the relevant text in IEC 60127-1 is to be adapted
accordingly.
Subclauses which are additional to those in Part 1 are numbered starting from 101. Additional
annexes are numbered AA, BB, etc.
A list of all parts in the IEC 60127 series, published under the general title Miniature fuses,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication wil
...