Miniature fuses - Part 5: Guidelines for quality assessment of miniature fuse-links

IEC 60127-5:2016 gives a guide for tests for assessing the quality of miniature fuse-links other than type tests, for the case where there is no complete agreement between the user and the manufacturer on what such tests apply. This document provides guidelines and limits generally acceptable for quality control purposes by large scale users and manufacturers of miniature fuse-links. This document has validity for large scale series with lot sizes of 10 000 and more. It is also applicable for smaller lot sizes, if necessary. Periodic inspections by reduced type tests (Clause 5) are intended to be carried out periodically in order to ensure that the level of technical performance previously verified by complete type tests as given in subsequent parts of the IEC 60127 series is maintained. The frequency of periodic in relation to lot-by-lot inspections is not established in this document. This second edition cancels and replaces the first edition published in 1988. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of new tables in 4.3;
- addition of new tables in Clause 5.
Keywords: quality of miniature fuse-links

Coupe-circuit miniatures - Partie 5: Lignes directrices pour l'évaluation de la qualité des éléments de remplacement miniatures

L'IEC 60127-5:2016 constitue un guide pour les essais d'évaluation de la qualité des éléments de remplacement miniatures. Il ne s'agit pas d'essais de type. Ce document s'applique lorsque l'utilisateur et le fabricant ne parviennent pas à convenir des éléments sur lesquels de tels essais s'appliquent. Il s'agit de spécifier des lignes directrices et des limites nécessaires au contrôle de la qualité, généralement acceptables aussi bien pour les gros utilisateurs que pour les fabricants d'éléments de remplacement miniatures. Le présent document est applicable aux grandes séries d'un effectif de 10 000 lots et plus. Il s'applique également à des effectifs comportant moins de lots, si nécessaire. Des contrôles périodiques constitués par des essais de type réduits (Article 5) sont destinés à être réalisés régulièrement afin de garantir le maintien du niveau des performances techniques vérifié précédemment par tous les essais de type spécifiés dans les parties subséquentes de la série IEC 60127. La fréquence des contrôles périodiques par rapport aux contrôles lot par lot n'est pas établie dans le présent document. Cette deuxième édition annule et remplace la première édition parue en 1988. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de nouveaux tableaux en 4.3;
- ajout de nouveaux tableaux à l'Article 5.
Mots clés: la qualité des éléments de remplacement miniatures

General Information

Status
Published
Publication Date
03-Nov-2016
Technical Committee
Drafting Committee
Current Stage
PPUB - Publication issued
Start Date
31-Dec-2016
Completion Date
04-Nov-2016
Ref Project

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IEC 60127-5
®

Edition 2.0 2016-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Miniature fuses –
Part 5: Guidelines for quality assessment of miniature fuse-links

Coupe-circuit miniatures –
Partie 5: Lignes directrices pour l'évaluation de la qualité des éléments de
remplacement miniatures

IEC 60127-5:2016-11(en-fr)

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60127-5

®


Edition 2.0 2016-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Miniature fuses –

Part 5: Guidelines for quality assessment of miniature fuse-links




Coupe-circuit miniatures –

Partie 5: Lignes directrices pour l'évaluation de la qualité des éléments de

remplacement miniatures















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.120.50 ISBN 978-2-8322-3716-8



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – IEC 60127-5:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Lot-by-lot inspection . 7
4.1 Test conditions . 7
4.2 Non-destructive tests . 7
4.3 Destructive tests . 7
4.3.1 Destructive tests for IEC 60127-2 and IEC 60127-3 . 7
4.3.2 Destructive tests for IEC 60127-4 . 8
4.3.3 Destructive tests for IEC 60127-7 . 8
4.4 Acceptance criteria . 9
5 Periodic inspection . 9
5.1 Reduced type tests for IEC 60127-2 or IEC 60127-3 . 9
5.2 Reduced type tests for IEC 60127-4 . 10
5.3 Reduced type tests for IEC 60127-7 . 10
Bibliography . 12

Table 1 – Primary characteristics (inspection level II) (Samples may be returned to the lot
after inspection) . 7
Table 2 (for IEC 60127-2 and IEC 60127-3) – Time/current characteristic
(IEC 60127-1:2006, 9.2.1) (Inspection level S4, destructive test) . 8
Table 3 (for IEC 60127-4) – Time/current characteristic (IEC 60127-1:2006, 9.2.1)
(Inspection level S4, destructive test) . 8
Table 4 (for IEC 60127-7) – Time/current characteristic (IEC 60127-1:2006, 9.2.1) –
(Inspection level S4, destructive test) . 9
Table 5 – Reduced type tests for IEC 60127-2 or IEC 60127-3 . 9
Table 6 – Reduced type tests for IEC 60127-4 . 10
Table 7 – Reduced type tests for IEC 60127-7 . 11

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IEC 60127-5:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MINIATURE FUSES –

Part 5: Guidelines for quality assessment of 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
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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 60127-5 has been prepared by subcommittee 32C: Miniature fuses,
of IEC technical committee 32: Fuses.
This second edition cancels and replaces the first edition published in 1988. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of new tables in 4.3;
b) addition of new tables in Clause 5.
The text of this standard is based on the following documents:
FDIS Report on voting
32C/526/FDIS 32C/530/RVD

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– 4 – IEC 60127-5:2016 © IEC 2016

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.
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 publication will remain unchanged until the
stability date indicated on the IEC website 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.

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IEC 60127-5:2016 © IEC 2016 – 5 –
INTRODUCTION
According to the wish expressed by the users of miniature fuses, all standards,
recommendations and other documents relating to miniature fuses should 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 containing general requirements need not be
repeated.
The IEC 60127 series, under the general heading Miniature fuses, 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 PAS 60127-8, Miniature fuses – Part 8: Fuse resistors with particular overcurrent protection
IEC 60127-9, (Free for further documents)
IEC 60127-10, Miniature fuses – Part 10: User guide for miniature fuses

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– 6 – IEC 60127-5:2016 © IEC 2016
MINIATURE FUSES –

Part 5: Guidelines for quality assessment of miniature fuse-links



1 Scope
This part of IEC 60127 gives a guide for tests for assessing the quality of miniature fuse-links
other than type tests, for the case where there is no complete agreement between the user and
the manufacturer on what such tests apply.
This document provides guidelines and limits generally acceptable for quality control purposes
by large scale users and manufacturers of miniature fuse-links. This document has validity for
large scale series with lot sizes of 10 000 and more. It is also applicable for smaller lot sizes, if
necessary.
Periodic inspections by reduced type tests (Clause 5) are intended to be carried out periodically
in order to ensure that the level of technical performance previously verified by complete type
tests as given in subsequent parts of the IEC 60127 series is maintained.
The frequency of periodic in relation to lot-by-lot inspections is not established in this document.
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 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 60127-2:2014, Miniature fuses – Part 2: Cartridge fuse-links
IEC 60127-3:2015, Miniature fuses – Part 3: Sub-miniature fuse-links
IEC 60127-4:2005, Miniature fuses – Part 4: Universal modular fuse-links (UMF) – Through-hole
and surface mount types
IEC 60127-4:2005/AMD1:2008
IEC 60127-4:2005/AMD2:2012
IEC 60127-7:2015, Miniature fuses – Part 7: Miniature fuse-links for special applications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60127-1:2006,
IEC 60127-4:2005 and IEC 60127-7:2015 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:

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IEC 60127-5:2016 © IEC 2016 – 7 –
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Lot-by-lot inspection
4.1 Test conditions
The sample appropriate to the acceptable quality level (AQL) and the inspection level should be
as designated in IEC 60410.
4.2 Non-destructive tests
Table 1 shows primary characteristics of samples.
Table 1 – Primary characteristics (inspection level II)
(Samples may be returned to the lot after inspection)
Category Test Sub-clause Classification of AQL
according to defects
IEC 60127-1:2006
Major Minor Each defect Total/
defect defect category
Marking Fuse-links 6.1 x – 0,25 –
Colour codes 6.4
a
Mechanical Terminations 8.3 x – 0,25 0,65
Alignment 8.4 x –
Dimensions 8.1 x –
cracked insulation – x –
(visible)
b
Electrical Cold resistance  x – 0,25 0,65
continuity
a
Without being immersed in water.
b
Limiting values given by the manufacturer and based upon voltage drop measured in accordance with 9.1,
IEC 60127-1:2006 but with a current not greater than 10% of rated current of the fuse.

If there are faults in one category that lead to faults in another category, these samples are
replaced by new ones. This replacement should only be made if the AQL value in this fault
category is not exceeded.
4.3 Destructive tests
4.3.1 Destructive tests for IEC 60127-2 and IEC 60127-3
4.3.1.1 Any failed fuses found in testing to Table 1 should be replaced by good samples, before
continuing with sampling and testing to Table 2.

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– 8 – IEC 60127-5:2016 © IEC 2016
Table 2 (for IEC 60127-2 and IEC 60127-3) –
Time/current characteristic (IEC 60127-1:2006, 9.2.1)
(Inspection level S4, destructive test)
Fraction in percentage of z, at multiple of I AQL
N
1,0 I 2,0 I 2,75 I 4 I 10 I
N N N N N
or or
a
1,5 I 2,1 I
N N
10 40 30 10 10 0,65
z = sample sizes according to sampling plan.
a
Modified endurance test according to 9.4 b) and c) of IEC 60127-1:2006/AMD1:2011/AMD2:2015.

4.3.1.2 When an acceptance number other than zero is indicated in the sampling plan, and any
fuse-links fail to operate at 2,0 I or 2,1 I within the maximum time indicated on the relevant
N N
Standard sheet, the test current should be increased without interruption to 2,2 I as follows:
N
For fuse-links having a melting time of 30 min maximum at 2,1 I for an additional 10 min.
N
For fuse-links having a melting time of 2 min maximum at 2,1 I for an additional 2 min.
N
For fuse-links having a melting time of 5 sec maximum at 2,0 I for an additional 5 s.
N
If any fuse-link fails to operate within this additional time, the lot should be deemed to be
unacceptable, regardless of acceptance number indicated in the sampling scheme.
4.3.2 Destructive tests for IEC 60127-4
4.3.2.1 Any failed fuses found in testing to Table 1 should be replaced by good samples, before
continuing with sampling and testing to Table 3.
Table 3 (for IEC 60127-4) – Time/current characteristic
(IEC 60127-1:2006, 9.2.1)
(Inspection level S4, destructive test)
Percentage of z, multiple rate of I AQL
N
1,25 I 2 I 10 I
N N N
20 60 20 0,65
z = Number of samples according to sampling scheme.

4.3.2.2 When an acceptance number other than zero is indicated in the sampling plan, and any
fuse-links fail to operate at 2,0 I within the maximum time indicated on the relevant Standard
N
sheet, the test current should be increased without interruption to 2,1 I as follows:
N
for an additional 2 min.
For fuse-links having a melting time of 2 min maximum at 2,0 I
N
If any fuse-link fails to operate within this additional time, the lot should be deemed to be
unacceptable, regardless of acceptance number indicated in the sampling scheme.
4.3.3 Destructive tests for IEC 60127-7
4.3.3.1 Any failed fuses found in testing to Table 1 should be replaced by good samples, before
continuing with sampling and testing to Table 4.

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IEC 60127-5:2016 © IEC 2016 – 9 –
Table 4 (for IEC 60127-7) – Time/current characteristic
(IEC 60127-1:2006, 9.2.1) – (Inspection level S4, destructive test)
AQL
Fraction in percentage of z, at multiple of I
N
I 2,0 I 2,75 I 4 I 10 I
OVL N N N N
or
2,1 I
N

t ≤ 1 h t ≤ 1 s
2max 8max
If specified If specified If specified If specified
t t t t
1min 3min 5min 7min
t t
4max 6max
10 40 10 10 30 0,65
z = sample sizes according to sampling plan.

4.4 Acceptance criteria
A batch of miniature fuse-links made in accordance with IEC 60127 (all parts) will be considered
as having an acceptable quality level, if the tests specified in Table 1 and one of Table 2 or Table
3 or Table 4 are performed in the order indicated and the number of defects found does not
exceed the acceptance number given in the relevant sampling plan.
Acceptance tests requiring lower AQL limits than are given above should be subject to special
agreement between the user and the manufacturer.
5 Periodic inspection
5.1 Reduced type tests for IEC 60127-2 or IEC 60127-3
Table 5 shows reduced type tests for IEC 60127-2 or IEC 60127-3.
Table 5 – Reduced type tests for IEC 60127-2 or IEC 60127-3
Subclause according to Description of tests Sample numbers in
IEC 60127-1:2006/ AMD1:2011/ decreasing values of voltage
AMD2:2015 drop
1 7 10 13 16 19 22 25
to to
8 11 14 17 20 23
6 30
9 12 15 18 21 24
6.1 Marking x x x x x x x
8.1 Dimensions x x x x x x x
8.4 Alignment x x x x x x x
9.1 Voltage drop x x x x x x x
Time/current

2,0 I or 2,1 I x
N N
characteristic
9.2.1
4,0 I   x
N
Endurance test and maximum sustained
9.4, items b) and c) x
dissipation
9.3 Breaking capacity
10 I or 50 I x  x
N N
(see Note)
NOTE Ratings 32 mA to 125 mA to be tested at 50 I .
N
Ratings 160 mA to 10 A to be tested at 10 I .
N

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– 10 – IEC 60127-5:2016 © IEC 2016
Where failures occur, test results should be evaluated as specified in 7.2.3 of
IEC 60127-1:2006/AMD2:2015.
5.2 Reduced type tests for IEC 60127-4
Table 6 shows reduced type tests for IEC 60127-4.
Table 6 – Reduced type tests for IEC 60127-4
Subclause according to Description of tests Sample numbers in decreasing values of
IEC 60127-1:2006/ voltage drop
AMD1:2011/ AMD2:2015
1 to 7 10 13 16 19 22 25
6 to
8 11 14 17 20 23
30
9 12 15 18 21 24
6.1 Marking x x x x x x x
8.1 Dimensions x x x x x x x
8.4 Alignment x x x x x x x
9.1 Voltage drop x x x x x x x
Time/current characteristic 2,0 I  x
N
9.2.1
10,0 I   x
N
Endurance test and maximum
9.4, items b) and c) x
sustained dissipation
9.3 Breaking capacity
10 I or 50 I x  x
N N
(see Note)
NOTE Ratings 32 mA to 125 mA to be tested at 50 I .
N
 Ratings 160 mA to 10 A to be tested at 10 I .
N

Where failures occur, test results should be evaluated as specified in 7.2.3 of
IEC 60127-1:2006:AMD2:2015.
5.3 Reduced type tests for IEC 60127-7
Table 7 shows reduced type tests for IEC 60127-7.

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IEC 60127-5:2016 © IEC 2016 – 11 –
Table 7 – Reduced type tests for IEC 60127-7
Subclause according to Description of tests Sample numbers in decreasing values of
IEC 60127-1:2006/ voltage drop
AMD1:2011/ AMD2:2015
1 to 6 7 10 13 16 19 22 25 to
30
11
8 14 17 20 23
9 12 15 18 21 24
6.1 Marking x x x x x x x
8.1 Dimensions x x x x x x x
8.4 Alignment x x x x x x x
9.1 Voltage drop x x x x x x x
9.2.1 Time/current 2,0 I (t )  x
N 2max
characteristic
10,0 I (t )   x
N 8max
Endurance test and maximum
9.4, items b) and c) x
sustained dissipation
9.3 Breaking capacity
5 I or 10 I or 50 I x  x
N N N
(see Note)
NOTE Ratings 32 mA to 125 mA to be tested at 50 I .
N
Ratings 160 mA to 10 A to be tested at 10 I .
N
Ratings > 10 A to be tested at 5 I .
N

Where failures occur, test results should be evaluated as specified in 7.2.3 of
IEC 60127-1:2006/AMD2:2015.

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– 12 – IEC 60127-5:2016 © IEC 2016
Bibliography
1
IEC 60410:1973,Sampling plans and procedures for inspection by attributes
IEC Guide 102:1996, Electronic components – Specification structures for quality assessment
1
(Qualification approval and capability approval)
ISO 3:1973, Preferred numbers – Series of preferred numbers

___________
____________
1
 This document has been withdrawn, but for the purposes of this standard it is given as a reference.

---------------------- Page: 14 ----------------------
– 14 – IEC 60127-5:2016 © IEC 2016
SOMMAIRE
AVANT-PROPOS . 15
INTRODUCTION . 17
1 Domaine d'application . 18
2 Références normatives . 18
3 Termes et définitions . 19
4 Contrôle lot par lot . 19
4.1 Conditions d'essai . 19
4.2 Essais non destructifs . 19
4.3 Essais destructifs . 20
4.3.1 Essais destructifs pour l’IEC 60127-2 et l’IEC 60127-3 . 20
4.3.2 Essais destructifs pour l’IEC 60127-4 . 20
4.3.3 Essais destructifs pour l’IEC 60127-7 . 21
4.4 Critères d'acceptation . 21
5 Contrôle périodique . 21
5.1 Essais de type réduits pour l’IEC 60127-2 ou l'IEC 60127-3 . 21
5.2 Essais de type réduits pour l’IEC 60127-4 . 22
5.3 Essais de type réduits pour l’IEC 60127-7 . 23
Bibliographie . 25

Tableau 1 – Caractéristiques primaires (niveau de contrôle I
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