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IEC 60512-9-5
Edition 2.0 2020-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Connectors for electrical and electronic equipment – Tests and measurements –
Part 9-5: Endurance tests – Test 9e: Current loading, cyclic
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IEC 60512-9-5
Edition 2.0 2020-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Connectors for electrical and electronic equipment – Tests and measurements –
Part 9-5: Endurance tests – Test 9e: Current loading, cyclic
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.220.01 ISBN 978-2-8322-8517-6
– 2 – IEC 60512-9-5:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Preparations . 7
4.1 Test equipment . 7
4.2 Preparation of specimens . 7
4.3 Mounting of specimens . 7
5 Test/measuring methods . 7
5.1 Pre-conditioning . 7
5.2 Initial measurements . 7
5.3 Test . 8
5.3.1 General . 8
5.3.2 Method A . 8
5.3.3 Method B . 8
5.4 Recovery . 9
5.5 Final measurements . 9
6 Details to be specified . 10
Bibliography . 11
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRICAL AND ELECTRONIC EQUIPMENT –
TESTS AND MEASUREMENTS –
Part 9-5: Endurance tests – Test 9e: Current loading, cyclic
FOREWORD
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC 60512-9-5:2020 RLV © IEC 2020
International Standard IEC 60512-9-5 has been prepared by subcommittee 48B: Electrical
connectors, of IEC technical committee 48: Electrical connectors and mechanical structures
for electrical and electronic equipment.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• added method B and renamed the former test method as method A, to provide an
alternative with more adjustable time “ON” and “OFF” for products with larger thermal
mass;
• added introduction to provide background of this revision;
The text of this International Standard is based on the following documents:
FDIS Report on voting
48B/2803/FDIS 48B/2819/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 60512 series, published under the general title Connectors for
electrical and electronic equipment – Tests and measurements, 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 "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
The object of this document is to detail a standard method for subjecting solderless
connections to a thermal stress conditioning by cyclic current loading, in order to verify the
right combination of conductor material, termination material and tool application – if any is
required, in view of any possible creep phenomena that might lead to a reduction of
performance of the solderless connection.
Although requiring electric power to apply the specified current loading, this test is an
endurance test by thermal conditioning, whose aim is to submit specimens of connectors
using solderless connections or of solderless connections to a repeated cycling between
ambient temperature (normal laboratory conditions) and the upper limiting temperature (ULT)
specified for the connector or solderless connection, either by the detail product specification
or the manufacturer specification, or by the default values provided in the relevant part of
IEC 60352 series.
The way the solderless connection under test acts is affected both by the solderless
termination design and material and the attached conductor size and material, as well as by
any tool applied to produce the connection, with all relevant settings and accessories as
specified for the particular combination of termination and conductor.
Time “ON” represents the “heating” interval necessary to reach the ULT from ambient
temperature, time “OFF” represents the “cooling” interval, necessary to cool down the
specimen to ambient temperature. The sum of these intervals represents a cycle. Due to the
various nature of a solderless connection in terms of size and thermal inertia of the
termination and of the attached conductor, the traditional method with fixed duty cycle
duration it is not always suitable.
For this reason, two methods are now provided to perform this test:
– method A is the traditional one, with time “ON” of 45 min and time “OFF” of 15 min, that
has proven suitable for small-sized solderless connections, e.g. connections employing
conductors with cross-sectional area less than or equal to 10 mm . However, even in such
cases, depending on the thermal mass of the termination or the conductor (e.g. for a
crimped connection), method B may be preferable;
– method B is with time “ON” or time “OFF” to be determined experimentally by the first test
cycle. Moreover, heating time by current load may be even abbreviated by increasing and
controlling the current load, whereas cooling may be accelerated too, by forced air cooling.
Because the number of repeated cycles is the primary factor affecting the severity of this
test, long duration times at ULT (highest temperature) and ambient temperature (lowest
temperature) may not be necessary for the purpose of this test. This method is suitable for
large-sized solderless connections, e.g. connections employing conductors with cross-
sectional area larger than 10 mm .
– 6 – IEC 60512-9-5:2020 RLV © IEC 2020
CONNECTORS
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