IEC PAS 60127-8:2014

IEC PAS 60127-8 ®
Edition 1.0 2014-12
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection

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IEC PAS 60127-8 ®
Edition 1.0 2014-12
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
T
ICS 29.120.50 ISBN 978-2-8322-1982-9

– 2 – IEC PAS 60127-8:2014 © IEC 2014

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

4 General requirements . 10

5 Standard ratings . 10
6 Marking . 10
7 General notes on tests . 11
7.1 Atmospheric conditions for testing . 11
7.2 Type tests . 11
7.3 Fuse-bases for tests . 12
7.3.1 General requirements . 12
7.3.2 Through-hole mounting of fuse resistors with particular overcurrent
protection . 12
7.3.3 Surface mounting of fuse resistors with particular overcurrent protection . 12
7.4 Nature of supply . 12
8 Dimensions and construction . 12
8.1 Dimensions . 12
8.1.1 Creepage distances and clearances . 13
8.2 Construction . 13
8.3 Terminations . 14
8.3.1 Through-hole mount fuse resistors with particular overcurrent protection . 14
8.3.2 Surface mount fuse resistors with particular overcurrent protection . 14
8.4 Alignment and configuration of terminations . 14
8.5 Soldered joints . 15
8.6 Solderability of terminations . 15
8.7 Resistance to soldering heat . 15
9 Electrical requirements . 15
9.1 Resistance value . 15
9.2 Functioning characteristic at the minimum breaking dissipation. 15

9.2.1 Functioning characteristic at an ambient temperature of 70 °C . 15
9.2.2 Test at elevated temperature . 16
9.2.3 Test procedure . 16
9.2.4 Presentation of results . 16
9.3 Rated breaking capacity. 16
9.3.2 Criteria for satisfactory performance . 17
9.3.3 Insulation resistance . 17
9.4 Endurance tests . 17
9.5 Maximum sustained dissipation . 18
9.6 Pulse tests . 18
9.7 Temperature of fuse resistors with particular overcurrent protection. 18
9.8 Operating overvoltage . 18
Bibliography . 25

Figure 1 – Test board for through-hole mount fuse resistors with particular overcurrent

protection . 20

Figure 2 – Test board for surface mount fuse resistors with particular overcurrent

protection . 21

Figure 3 – Test fuse-base . 22

Figure 4 – Bending jig for surface mount fuse resistors with particular overcurrent

protection . 23

Figure 5 – Test circuit for the tests according to 9.3 . 24

Table 1 – Creepage distances and clearances (absolute minimum values) . 13
Table 2 – Test voltages for dielectric strength . 17
Table 3 – Testing schedule for individual dissipation ratings . 19

– 4 – IEC PAS 60127-8:2014 © IEC 2014

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MINIATURE FUSES –
Part 8: Fuse resistors with particular overcurrent protection

FOREWORD
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A PAS is a technical specification not fulfilling the requirements for a standard, but made
available to the public.
IEC PAS 60127-8 has been processed by subcommittee 32C: Miniature fuses, of IEC
technical committee 32: Fuses.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
32C/500/PAS 32C/503/RVD
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.

A list of all parts in the IEC 60127, published under the general title Miniature fuses, can be

found on the IEC website.
This PAS shall remain valid for an initial maximum period of 3 years starting from the

publication date. The validity may be extended for a single period
...