IEC 60127-6:2023

Miniature fuses - Part 6: Fuse-holders for miniature fuse-links

IEC 60127-6:2023 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.

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

L'IEC 60127-6:2023 s'applique aux ensembles-porteurs pour éléments de remplacement à cartouches conformes à l'IEC 60127-2, aux éléments de remplacement subminiatures conformes à l'IEC 60127-3, aux éléments de remplacement modulaires universels conformes à l’IEC 60127-4 et aux éléments de remplacement miniatures pour applications spéciales conformes à l’IEC 60127-7 pour la protection d’appareils électriques, de matériels électroniques et de leurs éléments constituants, normalement destinés à être utilisés à l’intérieur de bâtiments.
NOTE Les exigences relatives aux ensembles-porteurs pour éléments de remplacement miniatures conformes à l’IEC 60127-4 et à IEC 60127-7 sont à l’étude. La présente partie de l’IEC 60269-1 ne s’applique pas aux ensembles-porteurs pour coupe-circuit à fusibles, traités par les parties suivantes de l’IEC 60269-1.

General Information

• Status: Published
• Publication Date: 25-Oct-2023
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: SC 32C - Miniature fuses
• Drafting Committee: MT 10 - TC 32/SC 32C/MT 10
• Current Stage: PPUB - Publication issued
• Start Date: 17-Nov-2023
• Completion Date: 26-Oct-2023

Relations

• Revises: IEC 60127-6:2014 - Miniature fuses - Part 6: Fuse-holders for miniature fuse-links
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60127-6 ®
Edition 3.0 2023-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Miniature fuses –
Part 6: Fuse-holders for miniature fuse-links

All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 60127-6 ®
Edition 3.0 2023-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Miniature fuses –
Part 6: Fuse-holders for miniature fuse-links
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-7754-6

– 2 – IEC 60127-6:2023 RLV © 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 standard ratings and classifications for fuse-holders . 17
6 Marking . 17
7 Clause deleted .
7 General notes on tests . 18
7.1 Nature of tests . 18
7.2 Standard atmospheric conditions for measurement and tests . 18
7.3 Preconditioning of test samples . 18
7.4 Nature of supply . 18
7.5 Gauges and dummy fuse-links for tests . 18
7.5.1 Gauges and dummy fuse-links according to IEC 60127-2 . 18
7.5.2 Gauges and dummy fuse-links according to IEC 60127-3 . 20
8.6 Type tests .
8 Protection against electric shock . 23
8.1 Category PC1: Fuse-holders without integral protection against electric
shock . 23
8.2 Category PC2: Fuse-holders with integral protection against electric shock . 23
8.3 Category PC3: Fuse-holders with enhanced integral protection against
electric shock . 24
9 Clearances and creepage distances . 24
9.1 General . 24
9.2 Minimum requirements for fuse-holders in respect to the grade of insulation . 24
9.3 Clearances . 25
9.4 Creepage distances . 27
10 Electrical requirements . 28
10.1 Insulation resistance, dielectric strength and impulse withstand voltage . 28
10.1.1 Mounting . 28
10.1.2 Humidity preconditioning . 29
10.1.3 Measurement of insulation resistance . 30
10.1.4 Dielectric strength test . 30
10.1.5 Impulse withstand voltage test . 30
10.2 Contact resistance . 31
10.2.1 General measuring requirements . 31
10.2.2 Measuring cycle. 31
11 Mechanical requirements . 34
11.1 General . 34
11.2 Mounting . 34
11.3 Compatibility between fuse-holder and fuse-link . 34
11.4 Mechanical strength of the connection between fuse-base and fuse-carrier . 35
11.4.1 Screw and bayonet connections . 35
11.4.2 Plug-in connection . 35

11.5 Impact test . 36
11.6 Mechanical strength of the fuse-holder fastening on panels . 36
11.6.1 Fixing nut fastening . 36
11.6.2 Fixing screw fastening . 36
11.6.3 Snap-in fastening . 37
11.7 Terminals of fuse-bases . 38
11.7.1 Terminals with screw-type clamping or screwless-type clamping . 38
11.7.2 Terminals for soldering . 38
11.8 Resistance to vibration . 41
11.8.1 General . 41
11.8.2 Mounting . 42
11.8.3 Measurement and requirements . 42
12 Thermal requirements . 42
12.1 Rated power acceptance test . 42
12.1.1 General . 42
12.1.2 Mounting . 43
12.1.3 Dummy fuse-links . 45
12.1.4 Measurement of maximum allowable temperatures on fuse-holders . 48
12.1.5 Correlation between ambient air temperature T and the power
A1
acceptance of a fuse-holder . 52
12.1.6 Temperature measuring point for ambient air temperature T . 52
A1
12.1.7 Test method . 52
12.2 Resistance to abnormal heat and fire . 53
12.2.1 Needle-flame test . 53
12.2.2 Glow-wire ignition test . 54
13 Endurance . 54
13.1 General . 54
13.2 Endurance test. 54
13.3 Requirements . 54
14 Additional requirements . 55
14.1 Resistance to rusting . 55
14.2 Resistance to cleaning solvents . 55
Annex A (normative) Test PC board for fuse-holders of rated currents up to 10 25 A . 56
Annex B (normative) Type tests, test sequences and number of samples . 59
Annex C (informative) Insulation coordination . 61
C.1 Overvoltage categories . 61
C.2 Degrees of pollution in the micro-environment . 61
C.3 Comparative tracking index CTI . 62
Annex D (informative) Additional tests and requirements . 63
D.1 General . 63
D.2 Resistance to shock . 63
D.2.1 General . 63
D.2.2 Mounting . 63
D.2.3 Measurement and requirements . 63
D.3 Verification of the degree of protection of enclosures . 63
D.4 Climatic category . 64
D.4.1 General . 64
D.4.2 Test conditions and requirements . 64

– 4 – IEC 60127-6:2023 RLV © IEC 2023
Annex E (informative normative) Information for the correct application of the fuse-
holder . 65
Bibliography . 66

Figure 1 – Outline of gauges and dummy fuse-links according to IEC 60127-2. 19
Figure 2 – Outline of gauges and dummy fuse-links according to IEC 60127-3:2015,
standard sheet 1 .
...

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
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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containing more than 22 300 terminological entries in English
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and French, with equivalent terms in 19 additional languages.
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(IEV) online.
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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

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 .
...