SIST EN IEC 60127-6:2025

SLOVENSKI STANDARD
01-marec-2025
Miniaturne varovalke - 6. del: Ohišja varovalk za miniaturne taljive vložke (IEC
60127-6:2023)
Miniature fuses - Part 6: Fuse-holders for miniature fuse-links (IEC 60127-6:2023)
Geräteschutzsicherungen - Teil 6: G-Sicherungshalter für G-Sicherungseinsätze (IEC
60127-6:2023)
Coupe-circuit miniatures - Partie 6: Ensembles-porteurs pour cartouches de coupe-
circuits miniatures (IEC 60127-6:2023)
Ta slovenski standard je istoveten z: EN IEC 60127-6:2024
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60127-6

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2024
ICS 29.120.50 Supersedes EN 60127-6:2014
English Version
Miniature fuses - Part 6: Fuse-holders for miniature fuse-links
(IEC 60127-6:2023)
Coupe-circuit miniatures - Partie 6: Ensembles-porteurs Geräteschutzsicherungen - Teil 6: G-Sicherungshalter für
pour cartouches de coupe-circuits miniatures G-Sicherungseinsätze
(IEC 60127-6:2023) (IEC 60127-6:2023)
This European Standard was approved by CENELEC on 2024-09-18. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60127-6:2024 E

European foreword
The text of document 32C/620/FDIS, future edition 3 of IEC 60127-6, prepared by SC 32C "Miniature
fuses" of IEC/TC 32 "Fuses" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60127-6:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-10-31
document have to be withdrawn
This document supersedes EN 60127-6:2014 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60127-6:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60060-1:2010 NOTE Approved as EN 60060-1:2010 (not modified)
IEC 60060-3:2006 NOTE Approved as EN 60060-3:2006 (not modified)
IEC 60068-2-1:2007 NOTE Approved as EN 60068-2-1:2007 (not modified)
IEC 60068-2-2:2007 NOTE Approved as EN 60068-2-2:2007 (not modified)
IEC 60112:2020 NOTE Approved as EN IEC 60112:2020 (not modified)
IEC 60269-1 NOTE Approved as EN 60269-1
IEC 60364-4-44 NOTE Approved as HD 60364-4-444
IEC 60695-2-11 NOTE Approved as EN IEC 60695-2-11
IEC 61140 NOTE Approved as EN 61140
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-441 - International Electrotechnical Vocabulary. - -
Switchgear, controlgear and fuses
IEC 60050-581 - International Electrotechnical Vocabulary - - -
Part 581: Electromechanical components
for electronic equipment
IEC 60068-1 2013 Environmental testing - Part 1: General EN 60068-1 2014
and guidance
IEC 60068-2-6 2007 Environmental testing - Part 2-6: Tests - EN 60068-2-6 2008
Test Fc: Vibration (sinusoidal)
IEC 60068-2-20 2021 Environmental testing - Part 2-20: Tests - EN IEC 60068-2-20 2021
Test Ta and Tb: Test methods for
solderability and resistance to soldering
heat of devices with leads
IEC 60068-2-21 - Environmental testing - Part 2-21: Tests - EN IEC 60068-2-21 -
Test U: Robustness of terminations and
integral mounting devices
IEC 60068-2-27 2008 Environmental testing - Part 2-27: Tests - EN 60068-2-27 2009
Test Ea and guidance: Shock
IEC 60068-2-45 - Basic environmental testing procedures - EN 60068-2-45 -
Part 2-45: Tests - Test XA and guidance:
Immersion in cleaning solvents
IEC 60068-2-47 - Environmental testing - Part 2-47: Test - EN 60068-2-47 -
Mounting of specimens for vibration,
impact and similar dynamic tests
IEC 60068-2-75 - Environmental testing - Part 2-75: Tests - EN 60068-2-75 -
Test Eh: Hammer tests
IEC 60127-1 2006 Miniature fuses - Part 1: Definitions for EN 60127-1 2006
miniature fuses and general requirements
for miniature fuse-links
+ A1 2011  + A1 2011
+ A2 2015  + A2 2015
IEC 60127-2 - Miniature fuses - Part 2: Cartridge fuse- EN 60127-2 -
links
IEC 60127-3 2015 Miniature fuses - Part 3: Sub-miniature EN 60127-3 2015
fuse-links
IEC 60216-1 - Electrical insulating materials - Thermal EN 60216-1 -
endurance properties - Part 1: Ageing
procedures and evaluation of test results
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- -  + corrigendum May 1993
IEC 60664-1 2020 Insulation coordination for equipment EN IEC 60664-1 2020
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60695-2-12 2021 Fire hazard testing - Part 2-12: EN IEC 60695-2-12 2021
Glowing/hot-wire based test methods -
Glow-wire flammability index (GWFI) test
method for materials
IEC 60695-2-13 2021 Fire hazard testing - Part 2-13: EN IEC 60695-2-13 2021
Glowing/hot-wire based test methods -
Glow-wire ignition temperature (GWIT) test
method for materials
IEC 60695-4 2012 Fire hazard testing - Part 4: Terminology EN 60695-4 2012
concerning fire tests for electrotechnical
products
IEC 60695-11-5 2016 Fire hazard testing - Part 11-5: Test flames EN 60695-11-5 2017
- Needle-flame test method - Apparatus,
confirmatory test arrangement and
guidance
IEC 60999-1 - Connecting devices - Electrical copper EN 60999-1 -
conductors - Safety requirements for
screw-type and screwless-type clamping
units - Part 1: General requirements and
particular requirements for clamping units
for conductors from 0,2 mm2 up to 35 mm2
(included)
IEC 61210 - Connecting devices - Flat quick-connect EN 61210 -
terminations for electrical copper
conductors - Safety requirements

IEC 60127-6 ®
Edition 3.0 2023-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Miniature fuses –
Part 6: Fuse-holders for miniature fuse-links

Coupe-circuit miniatures –
Partie 6: Ensembles-porteurs pour cartouches de coupe-circuits miniatures

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50  ISBN 978-2-8322-7651-8

– 2 – IEC 60127-6:2023 © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 11
4 General requirements . 15
5 Preferred ratings and classifications for fuse-holders . 16
6 Marking . 16
7 General notes on tests . 17
7.1 Nature of tests . 17
7.2 Standard atmospheric conditions for measurement and tests . 17
7.3 Preconditioning of test samples . 17
7.4 Nature of supply . 17
7.5 Gauges for tests . 17
7.5.1 Gauges according to IEC 60127-2 . 17
7.5.2 Gauges according to IEC 60127-3 . 19
8 Protection against electric shock . 20
8.1 Category PC1: Fuse-holders without integral protection against electric
shock . 20
8.2 Category PC2: Fuse-holders with integral protection against electric shock . 20
8.3 Category PC3: Fuse-holders with enhanced integral protection against
electric shock . 20
9 Clearances and creepage distances . 21
9.1 General . 21
9.2 Minimum requirements for fuse-holders in respect to the grade of insulation . 21
9.3 Clearances . 21
9.4 Creepage distances . 23
10 Electrical requirements . 24
10.1 Insulation resistance, dielectric strength and impulse withstand voltage . 24
10.1.1 Mounting . 24
10.1.2 Humidity preconditioning . 24
10.1.3 Measurement of insulation resistance . 25
10.1.4 Dielectric strength test . 25
10.1.5 Impulse withstand voltage test . 25
10.2 Contact resistance . 26
10.2.1 General measuring requirements . 26
10.2.2 Measuring cycle. 26
11 Mechanical requirements . 29
11.1 General . 29
11.2 Mounting . 29
11.3 Compatibility between fuse-holder and fuse-link . 29
11.4 Mechanical strength of the connection between fuse-base and fuse-carrier . 30
11.4.1 Screw and bayonet connections . 30
11.4.2 Plug-in connection . 30
11.5 Impact test . 31
11.6 Mechanical strength of the fuse-holder fastening on panels . 31

IEC 60127-6:2023 © IEC 2023 – 3 –
11.6.1 Fixing nut fastening . 31
11.6.2 Fixing screw fastening . 31
11.6.3 Snap-in fastening . 32
11.7 Terminals of fuse-bases . 33
11.7.1 Terminals with screw-type clamping or screwless-type clamping . 33
11.7.2 Terminals for soldering . 33
11.8 Resistance to vibration . 36
11.8.1 General . 36
11.8.2 Mounting . 36
11.8.3 Measurement and requirements . 37
12 Thermal requirements . 37
12.1 Rated power acceptance test . 37
12.1.1 General . 37
12.1.2 Mounting . 37
12.1.3 Dummy fuse-links . 38
12.1.4 Measurement of maximum allowable temperatures on fuse-holders . 42
12.1.5 Correlation between ambient air temperature T and the power
A1
acceptance of a fuse-holder . 44
12.1.6 Temperature measuring point for ambient air temperature T . 45
A1
12.1.7 Test method . 45
12.2 Resistance to abnormal heat and fire . 46
12.2.1 Needle-flame test . 46
12.2.2 Glow-wire ignition test . 47
13 Endurance . 47
13.1 General . 47
13.2 Endurance test. 47
13.3 Requirements . 47
14 Additional requirements . 48
14.1 Resistance to rusting . 48
14.2 Resistance to cleaning solvents . 48
Annex A (normative) Test PC board for fuse-holders of rated currents up to 25 A . 49
Annex B (normative) Type tests, test sequences and number of samples . 50
Annex C (informative) Insulation coordination . 51
C.1 Overvoltage categories . 51
C.2 Degrees of pollution in the micro-environment . 51
C.3 Comparative tracking index CTI . 52
Annex D (informative) Additional tests and requirements . 53
D.1 General . 53
D.2 Resistance to shock . 53
D.2.1 General . 53
D.2.2 Mounting . 53
D.2.3 Measurement and requirements . 53
D.3 Verification of the degree of protection of enclosures . 53
D.4 Climatic category . 54
D.4.1 General . 54
D.4.2 Test conditions and requirements . 54
Annex E (normative) Information for the correct application of the fuse-holder . 55
Bibliography . 56

– 4 – IEC 60127-6:2023 © IEC 2023

Figure 1 – Outline of gauges and dummy fuse-links according to IEC 60127-2. 18
Figure 2 – Outline of gauges and dummy fuse-links according to IEC 60127-3:2015,
standard sheet 1 . 19
Figure 3 – Outline of gauges and dummy fuse-links according to IEC 60127-3:2015,
standard sheets 3 and 4 . 19
Figure 4 – Panel mounting . 24
Figure 5 – PC board mounting . 24
Figure 6 – Test device for mechanical test . 29
Figure 7 – Examples of snap-in fastening Fuse-holder on panels . 32
Figure 8 – Tensile force test . 36
Figure 9 – Compressive force test . 36
Figure 10 – Example of test device . 38
Figure 11 – IEC 60127-3:2015, Standard sheet 1 . 41
Figure 12 – IEC 60127-3:2015, Standard sheets 3 and 4 . 41
Figure 13 – Illustration of temperatures experienced in practice . 43
Figure 14 – Example of a derating curve . 46
Figure A.1 – Example of a test board . 49

Table 1 – Features of unexposed or exposed fuse-holders . 15
Table 2 – Values for preferred ratings and classifications . 16
Table 3 – Dimensions and materials for gauges according to IEC 60127-2 . 18
Table 4 – Dimensions and materials for gauges according to IEC 60127-3 . 20
Table 5 – Types of insulation between different live parts and accessible parts . 21
Table 6 – Required impulse withstand voltage for clearances . 22
Table 7 – Minimum clearances in air under overvoltage category II II. 22
Table 8 – Minimum clearances in air under overvoltage category II . 23
Table 9 – Minimum creepage distances in millimetres for a microenvironment-
dependent on rated voltage, pollution degree, insulating material, corresponding to
IEC 60664-1:2020, Table F.5 . 23
Table 10 – Values for insulation resistance, dielectric strength and impulse withstand
voltage . 28
Table 11 – Values for torque and axial pull . 30
Table 12 – Torque values . 31
Table 13 – Torque values . 32
Table 14 – Mounting groups . 33
Table 15 – Cross-sections of conductors . 34
Table 16 – Tensile and compressive forces . 36
Table 17 – Dimensions and materials for dummy fuse-link according to IEC 60127-2 . 39
Table 18 – Dummy fuse-links according to IEC 60127-2 . 39
Table 19 – Dimensions and materials for dummy fuse-links according to IEC 60127-3 . 40
Table 20 – Dummy fuse-links according to IEC 60127-3 . 42
Table 21 – Maximum allowable temperatures . 44
Table A.1 – Copper layer for test board . 49
Table B.1 – Type tests, test sequences and number of samples . 50

IEC 60127-6:2023 © IEC 2023 – 5 –
Table D.1 – Examples of climatic categories . 54
Table E.1 – Information for the correct application of the fuse-holder . 55

– 6 – IEC 60127-6:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 6: Fuse-holders 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 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. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60127-6 has been prepared by subcommittee 32C: Miniature fuses, of IEC technical
committee 32: Fuses. It is an International Standard.
This third edition cancels and replaces the second edition published in 2014. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) enhanced maximum rated current from 16 A to 25 A in Clause 1;
b) adding of IEC 60127-4 and IEC 60127-7 in Clause 1;
c) modification of marking position in Clause 6;
d) modification of rated voltage, rated current and rated power acceptance in Table 2;
e) modification of Table 5, Table 6, Table 7, Table 9, Table 16 and Table A.1.

IEC 60127-6:2023 © IEC 2023 – 7 –
The text of this International Standard is based on the following documents:
Draft Report on voting
32C/620/FDIS 32C/623/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
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 document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
– 8 – IEC 60127-6:2023 © IEC 2023
INTRODUCTION
According to the wish expressed by the users of miniature fuses, all standards,
recommendations and other documents relating to miniature fuses have the same publication
number in order to facilitate reference to fuses in other specifications, for example, equipment
specifications.
Furthermore, a single publication number and subdivision into parts would facilitate the
establishment of new standards, because clauses and subclauses containing general
requirements need not be repeated.
To this day, the IEC 60127 series, is thus subdivided as follows:
IEC 60127-1, Miniature fuses – Part 1: Definitions for miniature fuses and general requirements
for miniature fuse-links
IEC 60127-2, Miniature fuses – Part 2: Cartridge fuse-links
IEC 60127-3, Miniature fuses Part 3: Sub-miniature fuse-links
IEC 60127-4, Miniature fuses – Part 4: Universal modular fuse-links (UMF) – Through-hole and
surface mount types
IEC 60127-5, Miniature fuses – Part 5: Guidelines for quality assessment of miniature fuse-links
IEC 60127-6, Miniature fuses – Part 6: Fuse-holders for miniature fuse-links
IEC 60127-7, Miniature fuses – Part 7: Miniature fuse-links for special applications
IEC 60127-8, Miniature fuses – Part 8: Fuse resistors with particular overcurrent protection
IEC 60127-10, Miniature fuses – Part 10:User guide for miniature fuses
This part of IEC 60127 covers requirements, test equipment and test methods for fuse-holders.
It is a self-standing document, which refers back to IEC 60127-1 with regard to certain
definitions and the atmospheric conditions for test. It also makes reference to other parts of the
IEC 60127 series with regard to dimensions and maximum power losses of fuse-links.

IEC 60127-6:2023 © IEC 2023 – 9 –
MINIATURE FUSES –
Part 6: Fuse-holders for miniature fuse-links

1 Scope
This part of IEC 60127 is applicable to fuse-holders for miniature cartridge fuse-links according
to IEC 60127-2, sub-miniature fuse-links according to IEC 60127-3, universal modular fuse-
links to IEC 60127-4 and miniature fuse-links for special applications to IEC 60127-7 for the
protection of electric appliances, electronic equipment and component parts thereof, normally
intended for use indoors.
NOTE Requirements for fuse-holders for miniature fuse-links complying with IEC 60127-4 and IEC 60127-7 are
under consideration.
It does not apply to fuse holders for fuses completely covered by the subsequent parts of
IEC 60269-1.
This document applies to fuse-holders with:
– a maximum rated current of 25 A and
– a maximum rated voltage of 1 500 V DC or 1 000 V AC; and
– for use up to 2 000 m above sea-level, unless otherwise specified.
The object of this document is to establish uniform requirements for safety and the assessment
of electrical, mechanical, thermal and climatic properties of fuse-holders and the compatibility
between fuse-holders and fuse-links.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses
IEC 60050-581, International Electrotechnical Vocabulary (IEV) – Part 581: Electromechanical
components for electronic equipment
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-20:2021, Environmental testing – Part 2-20: Tests – Tests Ta and Tb: Test
methods for solderability and resistance to soldering heat of devices with leads
IEC 60068-2-21, Environmental testing – Part 2-21: Tests – Test U: Robustness of terminations
and integral mounting devices
IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock

– 10 – IEC 60127-6:2023 © IEC 2023
IEC 60068-2-45, Basic environmental testing procedures – Part 2-45: Tests – Test XA and
guidance: Immersion in cleaning solvents
IEC 60068-2-47, Environmental testing – Part 2-47: Test – Mounting of specimens for vibration,
impact and similar dynamic tests
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60127-1 :2006, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
IEC 60127-1:2006/AMD1:2011
IEC 60127-1:2006/AMD2:2015
IEC 60127-2, Miniature fuses – Part 2: Cartridge fuse-links
IEC 60127-3:2015, Miniature fuses – Part 3: Sub-miniature fuse-links
IEC 60216-1, Electrical insulating materials – Thermal endurance properties – Part 1: Ageing
procedures and evaluation of test results
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60664-1:2020, Insulation coordination for equipment within low-voltage supply systems –
Part 1: Principles, requirements and tests
IEC 60695-4:2012, Fire hazard testing – Part 4: Terminology concerning fire tests for
electrotechnical products
IEC 60695-2-12:2021, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability index (GWFI) test method for materials
IEC 60695-2-13:2021, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods –
Glow-wire ignition temperature (GWIT) test method for materials
IEC 60695-11-5:2016, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method
– Apparatus, confirmatory test arrangement and guidance
IEC 60999-1, Connecting devices – Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 61210, Connecting devices – Flat quick-connect terminations for electrical copper
conductors – Safety requirements
___________
A consolidated version of this publication exists, comprising IEC 60127-1:2006, IEC 60127-1:2006/AMD 1:2011
and IEC 60127-1:2006/AMD 2:2015.

IEC 60127-6:2023 © IEC 2023 – 11 –
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-441,
IEC 60050-581, IEC 60127-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
fuse-holder
combination of a fuse-base with its fuse-carrier
Note 1 to entry: In some fuse-holder constructions where the fuse-base and the fuse-carrier are not separate parts
the fuse-holder may consist of only the fuse-base and no fuse-carrier.
3.1.1
fuse-base
fuse-mount
fixed part of a fuse provided with contacts and terminals for connection to the system
[SOURCE: IEC 60127-1:2006, 3.10]
3.1.2
fuse-carrier
movable part of a fuse designed to carry a fuse-link
[SOURCE: IEC 60127-1:2006, 3.12]
3.1.3
unexposed fuse-holder
fuse-holder with enclosed contacts
3.1.4
exposed fuse-holder
fuse-holder with exposed contacts
EXAMPLE Clips.
3.2
rating
characteristic values that together define the working conditions upon which the tests are based
and for which the fuse-holder is designed
EXAMPLE Examples of rated values usually stated for fuse-holders are:
− voltage (U );
N
− current (I );
N
− power acceptance.
3.3
rated power acceptance
value of power acceptance of a fuse-holder assigned by the manufacturer
Note 1 to entry: This value is the maximum power dissipation produced by the inserted dummy fuse-link during
testing, at the rated current tolerated by the fuse-holder without exceeding the specified temperatures.
Note 2 to entry: The rated power acceptance is referred to an ambient temperature of 23 °C.

– 12 – IEC 60127-6:2023 © IEC 2023
3.4
rated current
value of current of a fuse-holder assigned by the manufacturer and to which the rated power
acceptance is referred
3.5
rated voltage
value of voltage of a fuse-holder assigned by the manufacturer and to which operation and
performance characteristics are referred
3.6
insulation coordination
mutual correlation of insulation characteristics of electrical equipment taking into account the
expected micro-environment and other influencing stresses
[SOURCE: IEC 60664-1:2020, 3.1.3, modified – Note 1 to entry has been removed.]
3.7
impulse withstand voltage
highest peak value of impulse voltage of specified form and polarity which does not cause
breakdown of insulation under specified conditions
[SOURCE: IEC 60664-1:2020, 3.1.15]
3.8
overvoltage category
numeral defining a transient overvoltage condition
Note 1 to entry: Specified categories, see Clause C.1.
[SOURCE: IEC 60664-1:2020, 3.1.20, modified – Note 1 to entry “Overvoltage categories I, II,
III and IV are used, see 4.3.2” has been entirely reworded.”]
3.9
pollution
any condition of foreign matter, solid, liquid, or gaseous (ionized
gases), that can affect dielectric strength or surface resistivity
[SOURCE: IEC 60664-1:2020, 3.1.24]
3.10
pollution degree
numeral characterizing the expected pollution of the micro-environment
Note 1 to entry: see Clause C.2.
[SOURCE: IEC 60664-1:2020, 3.1.25, modified – Note 1 to entry has been added].
3.11
micro-environment
ambient conditions which immediately influences the dimensioning of
the clearance and creepage distances
[SOURCE: IEC 60664-1:2020, 3.1.23]

IEC 60127-6:2023 © IEC 2023 – 13 –
3.12
clearance
shortest distance in air between two conductive parts
[SOURCE: IEC 60664-1:2020, 3.1.4]
3.13
creepage distance
shortest distance along the surface of a solid insulating material between two conductive parts
[SOURCE: IEC 60050-151:2001, 151-15-50]
3.14
solid insulation
solid insulating material or a combination of solid insulating material, placed between two
conductive parts or between a conductive part and a body part
[SOURCE: IEC 60664-1:2020, 3.1.6]
3.15
comparative tracking index
CTI
numerical value of the maximum voltage in volts which a material can withstand without tracking
and without a persistent flame occurring under specified test conditions
Note 1 to entry: The test for comparative tracking index in accordance with IEC 60112 is designed to compare the
performance of various insulating materials under test conditions, namely drops of an aqueous contaminant falling
on a horizontal surface leading to electrolytic conduction material groups and their CTI values, see Clause C.3.
[SOURCE: IEC 60050-212:2010, 212-11-59, modified – The Note to entry has been added.]
3.16
live part
conductor or conductive part intended to be energized in normal operation, including a neutral
conductor, but by convention, not a PEN conductor or PEM conductor or PEL conductor
Note 1 to entry: This concept does not necessarily imply a risk of electric shock.
[SOURCE: IEC 60050-826:2022, 826-12-08, modified – The domain “ and equipment> has been deleted, the definition has been reworded and the note to entry has
been added.]
3.17
fuse-holder electric shock protection categories
designation characterizing the level of the protection against electric shock of a fuse-holder
3.18
maximum allowable ambient temperature
highest air temperature, in the immediate vicinity, that a fuse-holder can endure at a power
acceptance assigned by the manufacturer of the fuse-holder without exceeding the maximum
allowable temperatures on the accessible and inaccessible surfaces of the fuse-holder
3.19
relative temperature index
based on IEC 60216-1, temperature index of a test material obtained from the time which
corresponds to the known temperature ind
...