IEC 60127-8:2018
(Main)Miniature fuses - Part 8: Fuse resistors with particular overcurrent protection
Miniature fuses - Part 8: Fuse resistors with particular overcurrent protection
IEC 60127-8:2018 relates to fuse resistors with particular overcurrent protection rated up to AC 500 V and/or DC 500 V for printed circuits and other substrate systems, used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors.
It does not apply to fuse resistors with particular overcurrent protection for appliances intended to be used under special conditions, such as in a corrosive or explosive atmosphere.
The object of this part of IEC 60127 is
a) to establish uniform requirements for fuse resistors with particular overcurrent protection so as to protect appliances or parts of appliances in the most suitable way;
b) to define the performance of the fuse resistors with particular overcurrent protection, so as to give guidance to manufacturers of electrical appliances and electronic equipment and to ensure replacement of fuse resistors with particular overcurrent protection by those of similar dimensions and characteristics;
c) to establish uniform test methods for fuse resistors with particular overcurrent protection, so as to allow verification of the values (for example rated dissipation, functioning characteristic and rated breaking capacity values) specified by the manufacturer.
This part of IEC 60127 applies in addition to the requirements of IEC 60127-1.
This first edition of IEC 60127-8 cancels and replaces IEC PAS 60127-8:2014.
This international standard is to be used in conjunction with IEC 60127-1.
Keywords: Miniature Fuses, Fuse-Resistors, Overcurrent Protection
Coupe-circuit miniatures - Partie 8: Résistances de protection avec protection particulière contre les surintensités
IEC 60127-8: 2018 porte sur les résistances de protection avec protection particulière contre les surintensités assignées jusqu’à 500 V en courant alternatif et/ou 500 V en courant continu pour les circuits imprimés et autres systèmes de substrat employés pour la protection d'appareils électriques, d’équipements électroniques et de leurs éléments constituants, normalement destinés à être utilisés à l'intérieur.
Elle n’est pas applicable aux résistances de protection avec protection particulière contre les surintensités placées dans des appareils destinés à être utilisés dans des conditions particulières, telles que des atmosphères corrosives ou explosives.
L’objet de la présente partie de l’IEC 60127 est
a) d’établir des exigences uniformes pour les résistances de protection avec protection particulière contre les surintensités afin de protéger les appareils ou les parties d’appareils de la façon la plus appropriée;
b) de définir les performances des résistances de protection avec protection particulière contre les surintensités afin de donner des recommandations aux fabricants d’appareils électriques et d'équipements électroniques et d’assurer le remplacement des résistances de protection avec protection particulière contre les surintensités par des résistances de dimensions et de caractéristiques similaires;
c) d’établir des méthodes d’essai uniformes pour les résistances de protection avec protection particulière contre les surintensités afin de permettre la vérification des valeurs spécifiées par le fabricant (par exemple, la dissipation assignée, la caractéristique de fonctionnement et le pouvoir de coupure assigné).
La présente partie de l'IEC 60127 s'applique en complément des exigences de l'IEC 60127-1.
Cette première édition de l’IEC 60127-8 annule et remplace l’IEC PAS 60127-8:2014.
La présente Norme internationale doit être utilisée conjointement avec l’IEC 60127-1.
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IEC 60127-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
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IEC 60127-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-5843-9
– 2 – IEC 60127-8:2018 © IEC 2018
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 . 11
7 General notes on tests . 11
7.1 Atmospheric conditions for testing . 11
7.2 Type tests . 11
7.2.1 General . 11
7.3 Fuse-bases for tests . 12
7.3.1 General . 12
7.3.2 General requirements . 12
7.3.3 Through-hole mounting of fuse resistors with particular overcurrent
protection . 13
7.3.4 Surface mounting of fuse resistors with particular overcurrent protection . 13
7.4 Nature of supply . 13
8 Dimensions and construction . 13
8.1 Dimensions . 13
8.1.1 Creepage distances and clearances . 13
8.2 Construction . 14
8.3 Terminations . 14
8.3.1 Through-hole mount fuse resistors with particular overcurrent protection . 15
8.3.2 Surface mount fuse resistors with particular overcurrent protection . 15
8.4 Alignment and configuration of terminations . 15
8.5 Soldered joints . 15
8.6 Solderability of terminations . 16
8.7 Resistance to soldering heat . 16
9 Electrical requirements . 16
9.1 Resistance value . 16
9.2 Functioning characteristic at the minimum breaking dissipation. 16
9.2.1 Functioning characteristic at an ambient temperature of 70 °C . 16
9.2.2 Test at elevated temperature . 16
9.2.3 Test procedure . 16
9.2.4 Presentation of results . 17
9.3 Rated breaking capacity. 17
9.3.1 Operating conditions . 17
9.3.2 Criteria for satisfactory performance . 17
9.3.3 Insulation resistance . 18
9.3.4 Dielectric strength. 18
9.4 Endurance tests . 18
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 . 19
Bibliography . 25
Figure 1 – Test board for through-hole mount fuse resistors with particular overcurrent
protection . 21
Figure 2 – Test board for surface mount fuse resistors with particular overcurrent
protection . 22
Figure 3 – Test fuse-base . 23
Figure 4 – Bending jig for surface mount fuse resistors with particular overcurrent
protection . 24
Figure 5 – Test circuit for the tests according to 9.3 . 24
Table 1 – Creepage distances and clearances (absolute minimum values) . 14
Table 2 – Test voltages for dielectric strength . 18
Table 3 – Testing schedule for individual dissipation ratings . 20
– 4 – IEC 60127-8:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 8: Fuse resistors with particular
overcurrent protection
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 60127-8 has been prepared by subcommittee SC 32C: Miniature
fuses, of IEC technical committee 32: Fuses
This first edition of IEC 60127-8 cancels and replaces IEC PAS 60127-8:2014.
This international standard is to be used in conjunction with IEC 60127-1.
The text of this International Standard is based on the following documents:
FDIS Report on voting
32C/542/FDIS 32C/546/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60127 series, published under the
...
IEC 60127-8 ®
Edition 1.1 2024-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60127-8 ®
Edition 1.1 2024-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-9425-3
REDLINE VERSION – 2 – IEC 60127-8:2018+AMD1:2024 CSV
© IEC 2024
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 . 11
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 . 12
7.3.2 General requirements . 12
7.3.3 Through-hole mounting of fuse resistors with particular overcurrent
protection . 13
7.3.4 Surface mounting of fuse resistors with particular overcurrent protection . 13
7.4 Nature of supply . 13
8 Dimensions and construction . 13
8.1 Dimensions . 13
8.2 Construction . 14
8.3 Terminations . 14
8.3.1 Through-hole mount fuse resistors with particular overcurrent protection . 15
8.3.2 Surface mount fuse resistors with particular overcurrent protection . 15
8.4 Alignment and configuration of terminations . 15
8.5 Soldered joints . 15
8.6 Solderability of terminations . 16
8.7 Resistance to soldering heat . 16
9 Electrical requirements . 16
9.1 Resistance value . 16
9.2 Functioning characteristic at the minimum breaking dissipation. 16
9.2.1 Functioning characteristic at an ambient temperature of 70 °C 23 °C ±
1 °C . 16
9.2.2 Test at elevated temperature . 16
9.2.3 Test procedure . 17
9.2.4 Presentation of results . 17
9.3 Rated breaking capacity. 17
9.3.1 Operating conditions . 17
9.3.2 Criteria for satisfactory performance . 18
9.3.3 Insulation resistance . 18
9.3.4 Dielectric strength. 18
9.4 Endurance tests . 18
9.5 Maximum sustained dissipation . 18
9.6 Pulse tests . 19
9.7 Temperature of fuse resistors with particular overcurrent protection. 19
9.8 Operating overvoltage . 19
© IEC 2024
Bibliography . 26
Figure 1 – Test board for through-hole mount fuse resistors with particular overcurrent
protection . 21
Figure 2 – Test board for surface mount fuse resistors with particular overcurrent
protection . 22
Figure 3 – Test fuse-base . 24
Figure 4 – Bending jig for surface mount fuse resistors with particular overcurrent
protection . 24
Figure 5 – Test circuit for the tests according to 9.3 . 25
Table 1 – Creepage distances and clearances (absolute minimum values) . 14
Table 2 – Test voltages for dielectric strength . 18
Table 3 – Testing schedule for individual dissipation ratings . 20
REDLINE VERSION – 4 – IEC 60127-8:2018+AMD1:2024 CSV
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 8: Fuse resistors with particular overcurrent protection
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
https://patents.iec.ch or www.iso.org/patents. IEC shall not be held responsible for identifying any or all such
patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60127-8 edition 1.1 contains the first edition (2018-06) [documents 32C/542/FDIS
and 32C/546/RVD] and its amendment 1 (2024-07) [documents 32C/638/FDIS and
32C/642/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
© IEC 2024
International Standard IEC 6012
...
IEC 60127-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
Coupe-circuit miniatures –
Partie 8: Résistances de protection avec protection particulière contre les
surintensités
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
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IEC 60127-8 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 8: Fuse resistors with particular overcurrent protection
Coupe-circuit miniatures –
Partie 8: Résistances de protection avec protection particulière contre les
surintensités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-6238-2
– 2 – IEC 60127-8:2018 © IEC 2018
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 . 11
7 General notes on tests . 11
7.1 Atmospheric conditions for testing . 11
7.2 Type tests . 11
7.2.1 General . 11
7.3 Fuse-bases for tests . 12
7.3.1 General . 12
7.3.2 General requirements . 12
7.3.3 Through-hole mounting of fuse resistors with particular overcurrent
protection . 13
7.3.4 Surface mounting of fuse resistors with particular overcurrent protection . 13
7.4 Nature of supply . 13
8 Dimensions and construction . 13
8.1 Dimensions . 13
8.1.1 Creepage distances and clearances . 13
8.2 Construction . 14
8.3 Terminations . 14
8.3.1 Through-hole mount fuse resistors with particular overcurrent protection . 15
8.3.2 Surface mount fuse resistors with particular overcurrent protection . 15
8.4 Alignment and configuration of terminations . 15
8.5 Soldered joints . 15
8.6 Solderability of terminations . 16
8.7 Resistance to soldering heat . 16
9 Electrical requirements . 16
9.1 Resistance value . 16
9.2 Functioning characteristic at the minimum breaking dissipation. 16
9.2.1 Functioning characteristic at an ambient temperature of 70 °C . 16
9.2.2 Test at elevated temperature . 16
9.2.3 Test procedure . 16
9.2.4 Presentation of results . 17
9.3 Rated breaking capacity. 17
9.3.1 Operating conditions . 17
9.3.2 Criteria for satisfactory performance . 17
9.3.3 Insulation resistance . 18
9.3.4 Dielectric strength. 18
9.4 Endurance tests . 18
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 . 19
Bibliography . 25
Figure 1 – Test board for through-hole mount fuse resistors with particular overcurrent
protection . 21
Figure 2 – Test board for surface mount fuse resistors with particular overcurrent
protection . 22
Figure 3 – Test fuse-base . 23
Figure 4 – Bending jig for surface mount fuse resistors with particular overcurrent
protection . 24
Figure 5 – Test circuit for the tests according to 9.3 . 24
Table 1 – Creepage distances and clearances (absolute minimum values) . 14
Table 2 – Test voltages for dielectric strength . 18
Table 3 – Testing schedule for individual dissipation ratings . 20
– 4 – IEC 60127-8:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 8: Fuse resistors with particular
overcurrent protection
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 prepar
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