EN 60127-10:2002

Miniature fuses - Part 10: User guide for miniature fuses

Relates to miniature fuses for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors, as specified in EN 60127-2, 60127-3 and 60127-4. It relates to fuse-holders for miniature fuse-links according to EN 60127-6. The object of this guide is to introduce the user to the important properties of miniature fuse-links and fuse-holders for miniature fuses-links and to give some guidance on applying them.

Geräteschutzsicherungen - Teil 10: Leitfaden für die Anwendung von Geräteschutzsicherungen

Coupe-circuit miniatures - Part 10: Guide d'utilisation pour coupe-circuit miniatures

S'applique aux coupe-circuit miniatures employés pour la protection d'appareils électriques, de matériels électroniques et de leurs éléments consti-tuants, normalement destinés à être utilisés à l'intérieur, tels que cela est spécifié dans la EN 60127-2, la EN 60127-3 et la EN 60127-4. Elle s'applique aux ensembles-porteurs pour éléments de remplacement miniatures selon la EN 60127-6. Le but de ce guide d'utilisation est de présenter à l'utilisateur les propriétés importantes des éléments de remplacement miniatures et des ensembles-porteurs pour éléments de remplace-ment miniatures et de donner des conseils sur leur utilisation.

Miniature fuses - Part 10: User guide for miniature fuses (IEC 60127-10:2001)

General Information

• Status: Published
• Publication Date: 05-Feb-2002
• Withdrawal Date: 31-Jan-2005
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: CLC/SR 32C - Miniature fuses
• Drafting Committee: IEC/SC 32C - IEC_SC_32C
• Parallel Committee: IEC/SC 32C - IEC_SC_32C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Feb-2002
• Completion Date: 06-Feb-2002
• Ref Project: SIST EN 60127-10:2004 - Miniature fuses -- Part 10: User guide for miniature fuses

Overview

EN 60127-10:2002 (CLC adoption of IEC 60127-10:2001) is the European user guide for miniature fuses used to protect electrical appliances, electronic equipment and their component parts (normally for indoor use). The guide explains the important properties of miniature fuse-links and associated fuse-holders, outlines how to apply them, and highlights selection and application issues for designers, safety engineers and procurement specialists.

Key topics

• Scope & applicability
  • Guidance for miniature fuses specified in EN/IEC 60127 parts 2, 3 and 4 (cartridge, sub‑miniature and Universal Modular Fuse‑links).
  • Covers fuse‑holders per EN/IEC 60127‑6. Not intended for special environments (corrosive or explosive atmospheres).
• Properties & benefits
  • Protection against short circuits and sustained overloads; diagnostic benefit of visual/open fuse.
  • Small size, low cost, wide range of time‑current characteristics and good reliability.
• Fuse characteristics
  • Standardized operating classes (FF, F, M, T, TT) defining time‑current behaviour from very‑quick to long time‑lag.
  • Discussion of breaking capacity, let‑through energy and I²t / It energy measures and their role in fault clearing and downstream protection.
• Types & mounting
  • Cartridge fuse‑links, sub‑miniature fuse‑links and Universal Modular Fuse‑links; through‑hole and surface‑mount options for PCB mounting; plug‑in and clip‑in types for easy replacement.
• Application guidance
  • Fuse selection criteria: electrical (rating, time‑current characteristic, breaking capacity, voltage drop), mechanical/physical dimensions, ambient temperature, discrimination/selectivity, DC and battery circuit considerations, pulse operation and I²t limitation.
  • Fuse‑holder selection, safety aspects and guidance on replacing fuse‑links (including precautions for exchange under load).
• Practical cautions
  • Different designs with same rating can behave differently (voltage drop, operation) - they may not be interchangeable in low‑voltage circuits; consult manufacturer when in doubt. If EN 60127 fuses are inadequate, refer to EN/IEC 60269 (low‑voltage fuses).

Applications

• Appliance and consumer electronics protection (PCBs, power supplies, chargers)
• Industrial electronic modules and control equipment for indoor environments
• Battery circuits and DC protection where miniature fuse time‑current behaviour and breaking capacity are compatible with fault conditions

Who uses this standard

• Electrical/electronic designers and engineers
• Product safety and compliance officers
• Test and quality teams, procurement specialists and certification bodies

Related standards

• EN/IEC 60127-2, -3, -4 (fuse types)
• EN/IEC 60127-6 (fuse‑holders)
• EN/IEC 60127-5 (quality assessment guidance)
• EN/IEC 60269 series (low‑voltage fuses) - when higher performance is required

EN 60127-10 provides practical, non‑prescriptive guidance to help select and apply miniature fuses safely and effectively across electronic and appliance applications.

Standards Content (Sample)

SLOVENSKI SIST EN 60127-10:2004

STANDARD
marec 2004
Miniature fuses - Part 10: User guide for miniature fuses (IEC 60127-10:2001)
ICS 29.120.50 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60127-10
NORME EUROPÉENNE
EUROPÄISCHE NORM January 2002
ICS 29.120.50
English version
Miniature fuses
Part 10: User guide for miniature fuses
(IEC 60127-10:2001)
Coupe-circuit miniatures Geräteschutzsicherungen
Part 10: Guide d'utilisation Teil 10: Leitfaden für die Anwendung
pour coupe-circuit miniatures von Geräteschutzsicherungen
(CEI 60127-10:2001) (IEC 60127-10:2001)
This European Standard was approved by CENELEC on 2002-02-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60127-10:2002 E
Foreword
The text of document 32C/294/FDIS, future edition 1 of IEC 60127-10, prepared by SC 32C, Miniature
fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60127-10 on 2002-02-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-02-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60127-10:2001 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60127-10:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60127-2 1989 Miniature fuses EN 60127-2 1991
+ corr. March 1990 Part 2: Cartridge fuse-links
1)
IEC 60127-3 1988 Part 3: Sub-miniature fuse-links EN 60127-3 1996
+ corr. June 1996
IEC 60127-4 1996 Part 4: Universal Modular Fuse-links EN 60127-4 1996
(UMF)
IEC 60127-6 1994 Part 6: Fuse-holders for miniature fuse- EN 60127-6 1994
links
IEC 60269 Series Low-voltage fuses EN 60269 Series

1)
EN 60127-3 includes A1:1991 and its corrigendum October 1994 to IEC 60127-3.

NORME CEI
INTERNATIONALE IEC
60127-10
INTERNATIONAL
Première édition
STANDARD
First edition
2001-11
Coupe-circuit miniatures –
Partie 10:
Guide d'utilisation pour coupe-circuit miniatures
Miniature fuses –
Part 10:
User guide for miniature fuses
 IEC 2001 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
P
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60127-10  IEC:2001 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.9
2 Normative references .9
3 Properties of miniature fuses .11
4 Different types of fuse-links .11
4.1 Characteristics .13
4.2 Breaking capacity.13
4.3 Cartridge fuse-links (IEC 60127-2) .13
4.4 Sub-miniature fuse-links (IEC 60127-3).15
4.5 Universal Modular Fuse-links (IEC 60127-4) .17
5 Applications.17
5.1 Applications – Fuse selection criteria .17
5.2 Electrical criteria .19
5.3 Mechanical/physical dimensions.19
6Protection by I t limitation and pulse operation.19
6.1 I t value .19
6.2 Pulse operation .21
6.3 I t limitation .21
7 Direct current (d.c.) applications.21
7.1 General information.21
7.2 Battery circuits .23
7.3 Inductive load circuits.23
8 Fuse-holders .23
8.1 Features .23
8.2 Safety aspects .23
8.3 Selection of a fuse-holder .23
8.4 Exchange of fuse-links under load.25
9 Performance on extra-low voltages.25
10 Influence of ambient temperature .27
Bibliography.31

60127-10  IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MINIATURE FUSES –
Part 10: User guide for miniature fuses
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60127-10 has been prepared by subcommittee 32C: Miniature
fuses, of IEC technical committee 32: Fuses.
The text of this standard is based on the following documents:
FDIS Report on voting
32C/294/FDIS 32C/301/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 3.
The committee has decided that the contents of this publication will remain unchanged until
2004. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60127-10  IEC:2001 – 7 –
INTRODUCTION
The users of miniature fuses express the wish that 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 and subclauses containing general require-
ments need not be repeated.
The new IEC 60127 series is thus subdivided as follows:
IEC 60127, Miniature fuses (general title)
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)
Part 5: Guidelines for quality assessment of miniature fuse-links
Part 6: Fuse-holders for miniature cartridge 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

60127-10  IEC:2001 – 9 –
MINIATURE FUSES –
Part 10: User guide for miniature fuses
1 Scope
This part of IEC 60127 relates to miniature fuses for the protection of electric appliances,
electronic equipment and component parts thereof, normally intended to be used indoors, as
specified in IEC 60127-2, 60127-3 and 60127-4.
This standard does not apply to fuses for appliances intended to be used under special
conditions, such as in a corrosive or explosive atmosphere.
It relates to fuse-holders for miniature fuse-links according to IEC 60127-6.
The object of this guide is to introduce the user to the important properties of miniature fuse-
links and fuse-holders for miniature fuses-links and to give some guidance on applying them.
NOTE 1 If the performance of IEC 60127 fuses proves inadequate, refer to IEC 60269.
NOTE 2 Fuse-links of the same type and rating may, due to differences in design, have different voltage drops
and different behaviours. Therefore, in practice, they may not be interchangeable when used in applications with
low-circuit voltages, especially in combination with fuse-links of lower rated currents.
NOTE 3 Contact the manufacturer for further information.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60127. For dated references, subsequent amend-
ments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of IEC 60127 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60127-2:1989, Miniature fuses – Part 2: Cartridge fuse-links
IEC 60127-3:1988, Miniature fuses – Part 3: Sub-miniature fuse-links
IEC 60127-4:1996, Miniatures fuses – Part 4: Universal Modular Fuse-links (UMF)
IEC 60127-6:1994, Miniature fuses – Part 6: Fuse-holders for miniature cartridge fuse-links
IEC 60269 (all parts), Low-voltage fuses

60127-10  IEC:2001 – 11 –
3 Properties of miniature fuses
The miniature fuse provides protection against the effects of short circuits and sustained
overloads, protecting components and conductors upstream of the fault and isolating the
faulty branch of the circuit downstream of the fault. The opening of the fuse-link also acts as a
diagnostic tool, helping to identify the location of the fault. These properties include:
• Wide range of physical types of construction: miniature fuses are available in a wide
choice of physical constructions. For example, there are fuse-links that can be fitted into
clips and fuse-holders or plugged into sockets enabling easy replacement. There are also
types which can be soldered on to printed wiring boards by through-hole mounting or
surface mounting, using wave soldering or reflow soldering.
• Low cost and very small dimensions: miniature fuses provide very good circuit
protection in a small package suitable for miniaturized equipment.
• Wide range of characteristics: miniature fuses are generally used within electronic
equipment, where prospective short-circuit currents are below 1 500 A. Fuses are
available with a very wide range of characteristics, from (very) quick acting types to (long)
time-lag types. The latter types are very useful because they can withstand inrush
currents experienced during switching on, but will also open under sustained overloads.
• Discrimination (selectivity): standardized fuse characteristics and limitation of let-
through energy ensure that a faulty circuit is isolated by the fuse without opening higher
rated upstream fuses, avoiding disconnection of the supply to healthy circuits downstream.
• Reliability: miniature fuses carry operational currents continuously without any substantial
change or deterioration in their characteristics, and give equal protection to that provided
by a new fuse. During their long life, no maintenance is required.
• Tamper-proof reproducible characteristics: miniature fuses provide a package of
protection tailor-made for the application. The same level of protection is then maintained
by a replacement fuse-link of the same type and rating, fitted after the fault has been
corrected. The extensive schedule of tests in the IEC 60127 series together with a quality
system such as that described in IEC 60127-5 and a follow-up service by a National
Certification Body, ensure that all aspects of fuse operation are accurately and safely
reproduced at any location world-wide.
• Arc dissipation: suitable fuses can disconnect faults so quickly that there is no time for
an arc to become established at the fault location.
4 Different types of fuse-links
IEC 60127 makes
...