IEC 60127-1:2006

INTERNATIONAL IEC
STANDARD 60127-1
Second edition
2006-06
Miniature fuses –
Part 1:
Definitions for miniature fuses and
general requirements for miniature fuse-links
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:

Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD 60127-1
Second edition
2006-06
Miniature fuses –
Part 1:
Definitions for miniature fuses and
general requirements for miniature fuse-links

 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale U
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 60127-1  IEC:2006(E)
CONTENTS
FOREWORD.3

1 Scope and object.5
2 Normative references .5
3 Terms and definitions .5
4 General requirements .9
5 Standard ratings .9
6 Marking .9
7 General notes on tests .10
7.1 Atmospheric conditions for testing.10
7.2 Type tests .11
7.3 Fuse-bases for tests.11
7.4 Nature of supply .11
8 Dimensions and construction.12
8.1 Dimensions .12
8.2 Construction.12
8.3 Terminations .12
8.4 Alignment and configuration of terminations .12
8.5 Soldered joints .12
9 Electrical requirements .12
9.1 Voltage drop.12
9.2 Time/current characteristic .13
9.3 Breaking capacity.14
9.4 Endurance tests .15
9.5 Maximum sustained dissipation .16
9.6 Pulse tests .16
9.7 Fuse-link temperature .16

Annex A (informative) Colour coding for miniature fuse-links .17
Annex B (informative) Example presentations of time/current characteristic
Annex C (informative) Audit testing and surveillance – Guidelines for the application of
the principles of IECEE 03 (CB-FCS) to miniature fuse-links.21

Bibliography.27

Figure A.1– Layout of colour bands.17
Figure B.1 – Example presentation of time/current characteristic, ratio 2:1 .19
Figure B.2 – Example presentation of time/current characteristic, ratio 3:1 .20
Figure C.1 – Example of a fuse-link description .22

Table A.1 – Colour coding for miniature fuse-links .18
Table C.1 – Audit testing for option 3 .25
Table C.2 – Audit testing for option 4 .26

60127-1  IEC:2006(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
MINIATURE FUSES –
Part 1: Definitions for miniature fuses and
general requirements for miniature fuse-links

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60127-1 has been prepared by subcommittee 32C: Miniature
fuses, of IEC technical committee 32: Fuses.
This second edition cancels and replaces the first edition (1988), together with amendment 1
(1999) and amendment 2 (2002), and constitutes a technical revision.
The major technical changes with regard to the first edition concern subclause 9.2.3 where
the nature of the current source has been clarified; in addition, IEC 60038: IEC standard
voltages, has been added to the list of normative references.

– 4 – 60127-1  IEC:2006(E)
The text of this standard is based on the following documents:
FDIS Report on voting
32C/387/FDIS 32C/390/RVD
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 Part 1 of the IEC 60127 series covers definitions, general requirements and tests
applicable to all types of miniature fuses (e.g. cartridge fuse-links, sub-miniature fuse-links
and universal modular fuse-links). All subsequent parts of the complete series should be read
in conjunction with this Part 1.
IEC 60127 consists of the following parts, under the general heading Mi ni ature fuses:
Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links
Part 2: Cartridge fuse-links
Part 3: Sub-miniature fuse-links
Part 4: Universal modular fuse-links (UMF) – Through-hole and surface mount types
Part 5: Guidelines for quality assessment of miniature fuse-links
Part 6: Fuse-holders for miniature fuse-links
Part 7: (Free for further documents)
Part 8: (Free for further documents)
Part 9: (Free for further documents)
Part 10: User guide for miniature fuses
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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 will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

60127-1  IEC:2006(E) – 5 –
MINIATURE FUSES –
Part 1: Definitions for miniature fuses and
general requirements for miniature fuse-links

1 Scope and object
This part of IEC 60127 covers the general requirements and tests applicable to all types of
miniature fuse-links (e.g. cartridge fuse-links, sub-miniature fuse-links and universal modular
fuse-links) for the protection of electric appliances, electronic equipment and component parts
thereof normally intended to be used indoors.
Specific details covering each major subdivision are given in subsequent parts.
This standard does not apply to fuses for appliances intended to be used under special
conditions, such as in a corrosive or explosive atmosphere.
The object of this standard is
a) to establish uniform requirements for miniature fuses so as to protect appliances or parts
of appliances in the most suitable way,
b) to define the performance of the fuses, so as to give guidance to designers of electrical
appliances and electronic equipment and to ensure replacement of fuse-links by those of
similar dimensions and characteristics,
c) to define methods of testing,
d) to define maximum sustained dissipation of fuse-links to ensure good compatibility of
stated power acceptance when used with fuse-holders according to this standard (see
IEC 60127-6).
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only
...