IEC 62211:2017
(Main)Inductive components - Reliability management
Inductive components - Reliability management
IEC 62211:2017 sets up a broad basis of electric and mechanical criteria of failure test procedures. This document is applicable to inductive components (chokes and transformers) based on magnetically soft materials. This edition includes the following significant technical changes with respect to the previous edition:
a) continuous shock and mechanical shock are integrated in the test conditions;
b) the normative references in Table 3 are changed.
Composants inductifs - Gestion de la fiabilité
L'IEC 62211:2017 établit une large base de critères électriques et mécaniques de procédures d’essais de défaillance. Le présent document est applicable aux composants inductifs (inductances de lissage et transformateurs) utilisant des matériaux magnétiques doux. Il s’agit des composants fondés essentiellement sur des tôles de fer laminées, de matériaux en poudre de fer (et alliages apparentés), ainsi que des ferrites et noyaux à bandes métalliques amorphes ou cristallines.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Intégration du choc continu et du choc mécanique dans les conditions d’essai;
b) Modification des références normatives dans le Tableau 3.
General Information
Relations
Standards Content (Sample)
IEC 62211 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
Inductive components – Reliability management
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.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.
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iPad. Vocabulary (IEV) online.
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variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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Centre: csc@iec.ch.
IEC 62211 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
Inductive components – Reliability management
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-3771-7
– 2 – IEC 62211:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Component families . 6
5 Test samples . 7
5.1 Classification by application . 7
5.2 Numbering of samples and content of test report . 7
5.3 Pre-treatment of test samples . 8
5.3.1 Magnetic pre-treatment . 8
5.3.2 Mechanical pre-treatment . 8
5.3.3 Exposure to reflow temperature profile . 8
6 Failure criteria . 8
7 Test conditions and specification of the minimum requirements . 11
8 Test sequence . 14
9 Test evaluation . 14
Bibliography . 15
Table 1 – General mechanical failure criteria . 9
Table 2 – Electrical failure criteria . 10
Table 3 – Test conditions . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUCTIVE COMPONENTS – RELIABILITY MANAGEMENT
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) 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 62211 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This second edition cancels and replaces the first edition published in 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) continuous shock and mechanical shock are integrated in the test conditions;
b) the normative references in Table 3 are changed.
– 4 – IEC 62211:2017 © IEC 2017
The text of this standard is based on the following documents:
FDIS Report on voting
51/1150/FDIS 51/1158/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 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site 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.
A bilingual version of this publication may be issued at a later date.
INDUCTIVE COMPONENTS – RELIABILITY MANAGEMENT
1 Scope
This document is applicable to inductive components (chokes and transformers) based on
magnetically soft materials. These are components based especially on laminated iron sheets,
iron powder materials (including alloys), as well as ferrites and amorphous or crystalline metal
band cores.
Winding assemblies mean wire winding assemblies as well as multilayer and stacking
technologies of planar technology including coils based on non-magnetic materials. Discrete
type components and the different types of surface mount inductive components (SMD) are
also considered in this document.
The reliability of assemblies of inductive components based on several technologies such as
glued types, types with clamps (clips), impregnated (varnished) types as well as (vacuum)
potted types can also be checked with this document.
The subsequent determinations can be applied either for the primary qualification of inductive
components or for all manners of requalification examinations (design, process, change of
production facility). They can also be applied for the monitoring of products out of actual
manufacturing processes.
This document sets up a broad basis of electric and mechanical criteria of failure test
procedures.
If manufacturers advertise compliance with this standard in their data sheets, customers can
request data to demonstrate compliance with this standard. The customers can also request
the product to be in compliance with this standard by a recognised body.
Customers and manufacturers can elect to perform additional testing and acceptance criteria
different than those defined in this standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-27, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
– 6 – IEC 62211:2017 © IEC 2017
IEC 60068-2-58, Environmental testing – Part 2-58: Tests – Test Td: Test methods for
solderability, resistance to dissolution of metallization and to soldering heat of surface
mounting devices (SMD)
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60424 (all parts), Ferrite cores – Guidelines on the limits of surface irregularities
IEC 61007:1994, Transformers and inductors for use in electronic and telecommunication
equipment – Measuring methods and test procedures
IEC 61248 (all parts), Transformers and inductors for use in electronic and telecommunication
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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
reliability
component level reliability of the inductive component in the
customer's electrical circuit application
3.2
reliability tests
sequence of tests performed on an individual component, each specific
test being designed to represent conditions under which the component is expected to
operate in end applications
Note 1 to entry: Categories of test levels are organised to be consistent for typical applications.
3.3
reliability tests
sequence of tests performed on a collection of components as arranged in a
specific end application under working conditions
3.4
component family
group of components characterised by the same common features, for example the same
magnetic base material, the same core size and the same winding type
4 Component families
In a similar way to the qualification rules contained in IEC 61248 (all parts), reliability tests
can be performed on typical samples representing families of inductive components.
A family of inductive components is defined on the basis of:
• the same application class as specified in IEC 61248 (all parts);
• the same magnetic base material group (for example ferrite, metal powder, etc.);
• the same core shape (for example E-type, RM, ring core, etc.);
• the same winding type (for example wire-wound, multilayer, stack, etc.);
• the same termination configuration (PTH, SMD etc.);
• comparable accessories and insulating materials (bobbin, clamps, insulating tapes, etc.);
• the same insulation principle (encapsulation, impregnation, potting).
This means that reliability tests for a family of unencapsulated, wire-wound PTH transformers
on RM ferrite cores, for instance, can be carried out representatively on small and large size
models (for example RM4 and RM14).
Similar conclusions applied to the other sizes regarding reliability can be made, as long as
one can prove that all materials used are the same in terms of their load characteristics.
NOTE This applies in particular to the properties of the magnetic materials (NiZn-ferrite cannot be handled in the
same way as, for example, MnZn-ferrite), the bobbin (plastic/shape), as well as other materials such as clips,
bonding agents, spacers and insulating tapes.
5 Test samples
5.1 Classification by application
With regard to their application in accordance with the rules of IEC 61248 (all parts), the
inductive components to be specified here are classified into the following classes:
• signal transformers (ST);
• power transformers (PT);
• power transformers for switched mode power supplies (PTS);
• pulse transformers (IT);
• inductors (chokes) (C);
• RF inductors (RF);
• intermediate frequency transformers (HF).
This classification as well as a further classification with regard to the core shape and the
magnetic material shall be documented. In a short technical description
...
IEC 62211 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Inductive components – Reliability management
Composants inductifs – Gestion de la fiabilité
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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3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 62211 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Inductive components – Reliability management
Composants inductifs – Gestion de la fiabilité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-8771-2
– 2 – IEC 62211:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Component families . 6
5 Test samples . 7
5.1 Classification by application . 7
5.2 Numbering of samples and content of test report . 7
5.3 Pre-treatment of test samples . 8
5.3.1 Magnetic pre-treatment . 8
5.3.2 Mechanical pre-treatment . 8
5.3.3 Exposure to reflow temperature profile . 8
6 Failure criteria . 8
7 Test conditions and specification of the minimum requirements . 11
8 Test sequence . 14
9 Test evaluation . 14
Bibliography . 15
Table 1 – General mechanical failure criteria . 9
Table 2 – Electrical failure criteria . 10
Table 3 – Test conditions . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUCTIVE COMPONENTS – RELIABILITY MANAGEMENT
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) 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 62211 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This second edition cancels and replaces the first edition published in 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) continuous shock and mechanical shock are integrated in the test conditions;
b) the normative references in Table 3 are changed.
– 4 – IEC 62211:2017 © IEC 2017
The text of this standard is based on the following documents:
FDIS Report on voting
51/1150/FDIS 51/1158/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 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site 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.
INDUCTIVE COMPONENTS – RELIABILITY MANAGEMENT
1 Scope
This document is applicable to inductive components (chokes and transformers) based on
magnetically soft materials. These are components based especially on laminated iron sheets,
iron powder materials (including alloys), as well as ferrites and amorphous or crystalline metal
band cores.
Winding assemblies mean wire winding assemblies as well as multilayer and stacking
technologies of planar technology including coils based on non-magnetic materials. Discrete
type components and the different types of surface mount inductive components (SMD) are
also considered in this document.
The reliability of assemblies of inductive components based on several technologies such as
glued types, types with clamps (clips), impregnated (varnished) types as well as (vacuum)
potted types can also be checked with this document.
The subsequent determinations can be applied either for the primary qualification of inductive
components or for all manners of requalification examinations (design, process, change of
production facility). They can also be applied for the monitoring of products out of actual
manufacturing processes.
This document sets up a broad basis of electric and mechanical criteria of failure test
procedures.
If manufacturers advertise compliance with this standard in their data sheets, customers can
request data to demonstrate compliance with this standard. The customers can also request
the product to be in compliance with this standard by a recognised body.
Customers and manufacturers can elect to perform additional testing and acceptance criteria
different than those defined in this standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-27, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
– 6 – IEC 62211:2017 © IEC 2017
IEC 60068-2-58, Environmental testing – Part 2-58: Tests – Test Td: Test methods for
solderability, resistance to dissolution of metallization and to soldering heat of surface
mounting devices (SMD)
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60424 (all parts), Ferrite cores – Guidelines on the limits of surface irregularities
IEC 61007:1994, Transformers and inductors for use in electronic and telecommunication
equipment – Measuring methods and test procedures
IEC 61248 (all parts), Transformers and inductors for use in electronic and telecommunication
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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
reliability
component level reliability of the inductive component in the
customer's electrical circuit application
3.2
reliability tests
sequence of tests performed on an individual component, each specific
test being designed to represent conditions under which the component is expected to
operate in end applications
Note 1 to entry: Categories of test levels are organised to be consistent for typical applications.
3.3
reliability tests
sequence of tests performed on a collection of components as arranged in a
specific end application under working conditions
3.4
component family
group of components characterised by the same common features, for example the same
magnetic base material, the same core size and the same winding type
4 Component families
In a similar way to the qualification rules contained in IEC 61248 (all parts), reliability tests
can be performed on typical samples representing families of inductive components.
A family of inductive components is defined on the basis of:
• the same application class as specified in IEC 61248 (all parts);
• the same magnetic base material group (for example ferrite, metal powder, etc.);
• the same core shape (for example E-type, RM, ring core, etc.);
• the same winding type (for example wire-wound, multilayer, stack, etc.);
• the same termination configuration (PTH, SMD etc.);
• comparable accessories and insulating materials (bobbin, clamps, insulating tapes, etc.);
• the same insulation principle (encapsulation, impregnation, potting).
This means that reliability tests for a family of unencapsulated, wire-wound PTH transformers
on RM ferrite cores, for instance, can be carried out representatively on small and large size
models (for example RM4 and RM14).
Similar conclusions applied to the other sizes regarding reliability can be made, as long as
one can prove that all materials used are the same in terms of their load characteristics.
NOTE This applies in particular to the properties of the magnetic materials (NiZn-ferrite cannot be handled in the
same way as, for example, MnZn-ferrite), the bobbin (plastic/shape), as well as other materials such as clips,
bonding agents, spacers and insulating tapes.
5 Test samples
5.1 Classification by application
With regard to their application in accordance with the rules of IEC 61248 (all parts), the
inductive components to be specified here are classified into the following classes:
• signal transformers (ST);
• power transformers (PT);
• power transformers for switched mode power supplies (PTS);
• pulse transformers (IT);
• inductors (chokes) (C);
• RF inductors (RF);
• intermediate frequency transformers (HF).
This classification as well as a further classification with regard to the core shape and the
magnetic material shall be documented. In a short technical description the materials used as
well as the construction of the inductive component shall be presented, and a data sheet as
well as a test specification for this shall be enclosed. It is necessary to specify for entirely
encapsulated inductive components the dimensions with their tolerances and a sectional view
of the construction.
All test samples shall be manufactured in the actual production environment with the same
tools and materials as used during regular production.
5.2 Numbering of samples and content of test report
All test samples shall be numbered. All test reports shall contain the following information:
• part number;
• date code;
• location of manufacture.
– 8 – IEC 62211:2017 © IEC 2017
5.3 Pre-treatment of test samples
5.3.1 Magnetic pre-treatment
It is essential to ensure that the test samples are in a magnetically neutral state, i.e. if
necessary they should undergo a demagnetisation cycle before the tests are conducted (in
accordance with IEC 61007).
5.3.2 Mechanical pre-treatment
For all tests, the test samples should be mounted on carrier boards that allow easy contacts,
for example printed circuit boards with plated-through holes (reflow soldering, wave soldering,
screw-mounting, etc.). The carrier board may not be necessary for very large components.
5.3.3 Exposure to reflow temperature profile
Multiple exposures to a reflow cycle before testing shall be a pre-requisite to performing the
test of Table 2. The suggested temperature profile for solder reflow components is in
accordance with IEC 60068-2-58.
The number of cycles and the temperature should be specified in the detail specification.
6 Failure criteria
Failure criteria are mechanical properties and electrical characteristics that guarantee that the
inductive components will work as specified, with serious impairments in performance as a
result if they are not met.
The mechanical failure criteria given in Table 1 are all designated as “general” failure criteria,
which means that they shall be checked at every stage of the test sequence in which
measurements shall be made or the failure criteria checked. In the electrical tests as specified
in Table 2, the general failure criteria should be treated in the same way as the mechanical
failure criteria.
The other electrical criteria can be considered as a list of suggestions which may, but do not
necessarily have to be, tested, depending on their relevance to the application. They shall be
specified explicitly in a qualification according to this document.
Extra criteria may be added to both the mechanical and the electrical failure criteria according
to customer requirements. In agreement with the customer, these can be used as additional
criteria for a general family release (where at least one other component size is being tested),
in order to achieve qualification for the whole component family.
A component family may be specified on the data sheet as being “in accordance with
IEC 62211” if the “general” failure criteria given in the “test evaluation” (see Clause 9) are met.
The rider “for the following application classes …” can only be given if the corresponding
failure criteria have been explicitly listed on the data sheet.
If only certain failure criteria given in this document are investigated during a reliability test,
then the manufacturer of the inductive component is entitled to include a reference in a table
or footnote to all “tests with failure criteria as given in IEC 62211”. Full compliance, however,
cannot be claimed.
The mechanical failure criteria listed in Table 1 are general failure criteria (apart from solvent
resistance) which are checked before and after the tests within the framework of the
component analysis.
If for special properties a trend of change caused by the tests is expected, this trend should
be fixed as part of the relevant failure criteria. Supplier data sheets which refer to IEC 62211
should contain this trend as part of the property. Trends can be agreed upon between
interested parties.
Table 1 – General mechanical failure criteria
a
Parameter Failure definition Measuring method /test criterion
Glue joint Cracks in the joint
Visual inspection (10× magnification)
Breakage of the joint Cracks, breakage of the glue or glue coming off are
generally not admissible
Glue comes off
Wire Wire breakage Visual inspection (10× magnification)
Damaged insulating Damaged insulating varnish
varnish
Max. of test wire diameter: wire diameter < 0,5 mm
0,5 mm max.: wire diameter > 0,5 mm
NOTE This wire damage is the one caused by the
reliability test in addition to the damage by pre-
soldering prior to the test.
Coil former a) Deforming Visual inspection (10× magnification) for items a), b),
and c)
b) Cracks
Mobility of pins in manual test not admissible
c) Breakage
Terminal retention test shall be specified between
Mobility of the pins
parties concerned
Mounting parts Snap and damage of Visual inspection on presence of part and on correct
mounting parts (clamps, functioning
covers, insulating tape)
An insulating tape is considered as detached if the
winding under the tape is visible
Encapsulation Splinters Visual inspection (10× magnification)
Cracks Not admissible
Flaking, delamination,
bulging
Molding resin comes off
Visual inspection (10× magnification). Generally not
the case (housing)
admissible for components working at operating voltage
> 100 V
For components working at operating voltage < 100 V,
only admissible if conducting contact between case and
transformer can be excluded (to be proved by
constructional drawing showing sectional view)
Bubble formation in Bubbles are not permitted
vacuum potting
Solvent resistance Chemical reaction with (Definitions of failure criteria and measuring methods
(optional) ambient substances according to customer specifications only)
Magnetic components Chips Testing and failure criteria according to IEC 60424 (all
(ferrite cores, iron powder
parts)
Cracks
cores, alloy power cores,
metal band cores)
Breakage
Solder joint at inductive Modifications of the solder Visual inspection (10× magnification)
component (not solder joints (compared to the
Evaluation according to IEC 61007:1994, 4.2.2
joints at carrier board) state when supplied)
NOTE The measuring method is underlined.
Table 2 lists the electrical properties of the components, the respective standards and test
conditions and special requirements.
– 10 – IEC 62211:2017 © IEC 2017
Table 2 – Electrical failure criteria
a b
Parameter Application class Failure definition Measuring method
Inductance or impedance General Beyond the scope of 4.4.4.1
c
the specification
Conducting state of Same measurement as DC
General No conduction
winding resistors (4.4.1.1)
High-voltage resistance General Beyond the scope of 4.4.2.1
the specification
Polarity General Incorrect polarity Same measurement as
turns ratio (no standard
criterion for single winding
chokes) 4.4.17 or
transformation ratio
4.4.7.1
Turns ratio General Incorrect turns ratio (See polarity)
DC resistance General Beyond the scope of 4.4.1.1
c
the specification
Quality factor Q C, ST Beyond the scope of 4.4.3.3
c
the specification
Resonant frequency C, PTS, RF, HF, ST, IT Beyond the scope of 4.4.8.1
the specification
Leakage inductance PT, PTS, HF, ST, IT Beyond the scope of 4.4.4.2
the specification
No-load current PT, PTS, ST Beyond the scope of 4.4.3.1
the specification
Magnetic shielding PT, PTS, RF, HF, ST, IT Beyond the scope of 4.4.21.1
the specification
Insulation resistance Beyond the scope of
PT, PTS, HF, ST, IT 4.4.2.3
(standard atmospheric the specification
conditions)
Capacitive test of shields PT, C, PTS, ST, IT Beyond the scope of 4.4.18.1
the specification
Noise level PT, C, PTS, ST, IT Beyond the scope of 4.4.19.1
the specification
Capacitance PTS, HF, ST, IT Beyond the scope of Self-capacitance 4.4.6.1
the specification
Interwinding capacitance
4.4.6.2
Magnetic flux leakage PT, C, PTS Beyond the scope of 4.4.21.2
the specification
Temperature rise PT, PTS, IT, C, RF, HF, Beyond the scope of 4.4.15
ST the specification
Short-term PT, PTS, HF, ST, IT Beyond the scope of 4.6.1 (only applicable to
(operation under load) the specification special HF components)
Insertion loss HF, ST Beyond the scope of 4.4.9.1
the specification
Return loss HF, ST Beyond the scope of 4.4.9.2
the specification
Total harmonic distortion HF, ST Beyond the scope of 4.4.13
the specification
Beyond the scope of
Voltage-time loadability PTS, IT 4.4.12
the specification
a
According to IEC 61248 (all parts).
b
Subclause number according to IEC 61007:1994.
c
Depending on the materials and assemblies used, shifts of parameters during the test may be allowed as far
as specified or agreed upon.
7 Test conditions and specification of the minimum requirements
Table 3 specifies the test conditions for the test specimen of reliability tests. There are two
different types of test conditions:
All conditions which are designated as “optional” are based on application-specific require-
ments and cannot be specified in general terms. They are not binding for compliance with this
document.
When all general conditions of this document are complied with, the manufacturer is allowed
to state in a data sheet that the component series is also in accordance with the optional test
conditions of IEC 62211 when all of their details are specified.
NOTE 1 Bending and solderability have not been considered in Table 3 but can be added and the tests performed
according to IEC 60068-2-21, IEC 60068-2-20, IEC 60068-3-13, IEC 60068-2-54 and IEC 60068-2-58.
NOTE 2 Substrate bending according to IEC 60068-2-21 and solderability/resistance to soldering heat according
to IEC 60068-2-20, IEC 60068-3-13, IEC 60068-2-54 and IEC 60068-2-58 have not been considered in Table 3, but
if these tests are requested they could be performed according to these documents.
– 12 – IEC 62211:2017 © IEC 2017
Table 3 – Test conditions (1 of 2)
a a a a a
Items Level S Level A Level B Level C Level D
b b c
Temperature cycle No. of cycles 1 000 1 000 100 100 10
according to IEC 60068-2-14
d
High temperature 150 °C 125 °C 125 °C 85 °C 70 °C
Test Na
d
105 °C
d
85 °C
Low temperature
−55 °C −40 °C −40 °C −40 °C −25 °C
30 s 30 s 30 s 3 min 3 min
Transit period m < 15 g
Transit period 500 g > m ≥ 15 g 3 min 3 min 3 min 3 min 3 min
Transit period m ≥ 500 g 55 min 55 min 55 min 55 min 55 min
Dwell time 30 min 30 min 30 min 30 min 30 min
e
Humidity test Condition 85 °C/85 % RH 85 °C/85 % RH 40 °C/90 % RH 40 °C/90 % RH 40 °C/90 % RH
e
according to IEC 60068-2-78 60 °C/90 % RH
e
85 °C/85 % RH
Period 1 000 h 1 000 h 1 000 h 96 h 96 h
d
Storage test Storage temperature 150 °C 125 °C 125 °C 85 °C 70 °C
d
according to IEC 60068-2-2 105 °C
d
Test Bb 85 °C
Duration 1 000 h 1 000 h 1 000 h 500 h 96 h
2 2 2 2
Non-repetitive shock according 2 000 m/s 1 000 m/s 1 000 m/s 1 000 m/s Not specified
to IEC 60068-2-27 6 ms, 3 axes 6 ms, 3 axes 6 ms, 3 axes 6 ms, 3 axes
Vibration-sinusoidal (10 to 2 000) Hz (10 to 2 000) Hz (10 to 500) Hz (10 to 55) Hz Not specified
according to IEC 60068-2-6 A = 1,5 mm or A = 1,5 mm or A = 0,75 mm or A = 1,5 mm or
2 2 2
200 m/s max. 200 m/s max. 100 m/s sweep 1 min
10 cycle/axis 10 cycle/axis 10 cycle/axis 3 axes, 2 h/axis
1 oct/min 1 oct/min 1 oct/min 6 h
Repetitive shock according to Condition to be specified between parties concerned Not specified
IEC 60068-2-27
Vibration-random (optional) Condition to be specified between parties concerned Not specified
Table 3 (2 of 2)
a a a a a
Items Level S Level A Level B Level C Level D
Storage test at low Condition/period –55 °C/96 h –40 °C/96 h –40 °C/96 h –40 °C/96 h Not specified
temperature (optional)
according to IEC 60068-2-1
Test Ab
Humidity cycle test (optional) Condition/period Start temperature 25 °C ± 3 °C / Not specified
according to IEC 60068-2-30 Upper air temperature 55 °C /
Test cycle – Variant 2
1 cycle
a
Application examples:
Level S is intended typically for, but not limited to, engine compartment in automobile.
Level A is intended for general non engine compartment in automobile.
Level B is intended for telecommunication and power supply.
Level C is intended for consumer electronics.
Level D is intended for bulk transformers.
b
For economical reasons, the number of cycles can be 100 or 300 if both parties agree.
c
The number of cycles can be raised to 300 at customer’s specific request.
d
If B is chosen, one of the three temperatures indicated shall be specified according to the application.
e
If B is chosen, one of the three humidity conditions shall be specified according to the application.
– 14 – IEC 62211:2017 © IEC 2017
8 Test sequence
As already specified in Clause 4, the first step is to define the units under test.
These are parts taken from mass production, or parts manufactured with series production
equipment under mass production conditions.
A separate test group of 30 test units should be provided for each test conditioning procedure
as specified in Clause 7.
The number of test units for a separate test group can be reduced to 5 for very large and
expensive components. This document has deliberately avoided linking together a series of
test conditioning procedures, as the complexity of the components means that there shall be
a clear assignment of conditioning procedure to the failure criterion.
All test units shall be numbered and tested against all the general failure criteria specified in
Clause 6, and the results documented (additional criteria are possible as an option, see
Clause 6). The test units shall then be divided into the test groups and mounted on the carrier
boards. After they are attached to the carrier boards, a visual inspection should be performed
for all mechanical failure criteria if possible.
NOTE For SMD, this is a test of the thermal stability of the device as specified in IEC 60068-2-20.
All electrical failure criteria specified are also checked at this point.
This is followed by the load condition tests specified in Clause 7.
After the tests and after a minimum of 2 h and a maximum of 48 h out of operation at room
temperature, the test units shall once again be checked against all general failure criteria, and
against any optional failure criteria if applicable, with the results documented in the test report.
9 Test evaluation
The general rule for all test groups is that after the test load condition procedures, no failures
are admissible against any of the general failure criteria or any optional failure criteria that
may apply. If one or more components fail in one test group, then a one-off requalification
process is possible. This means that the test cycle of the failure group is repeated once more
on the additional reserve batch of 30 components. This process can be carried out for a
maximum of 2 groups (general load condition procedures).
If the requalification test is completed successfully without failures, then the reliability test
specified according to this document can be considered as passed. For optional qualifications,
these may also be specified explicitly for this component.
If failures still arise in the requalification test for general load conditions, the reliability test
specified according to this document cannot be considered as passed. The cause of the
failures shall then be eliminated by the manufacturer in a redesign process (with proof),
and the resulting redesigned parts shall undergo another full reliability test as specified in
this document.
If failure occurs in optional test requalifications, then although general fulfilment of the
reliability requirements given in this document is confirmed, it is not permitted to specify
the optional qualifications as given in this document in the data sheet.
Bibliography
IEC 60068-2-20, Environmental testing – Part 2-20: Tests – Test T: Test methods for solder-
ability 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 60068-2-54, Environmental testing – Part 2-54: Tests – Test Ta: Solderability testing of
electronic components by the wetting balance method
IEC 60068-3-13, Environmental testing – Part 3-13: Supporting documentation and guidance
on Test T – Soldering
_____________
– 16 – IEC 62211:2017 © IEC 2017
SOMMAIRE
AVANT-PROPOS . 17
1 Domaine d’application . 19
2 Références normatives . 19
3 Termes et définitions . 20
4 Familles de composants . 21
5 Échantillons d’essai . 21
5.1 Classification par application . 21
5.2 Numérotation des échantillons et contenu du rapport d’essai . 22
5.3 Prétraitement d’échantillons d’essai . 22
5.3.1 Prétraitement magnétique . 22
5.3.2 Prétraitement mécanique . 22
5.3.3 Exposition au profit de température de fusion . 22
6 Critères de défaillance . 22
7 Conditions d’essai et spécification des exigences minimales . 25
8 Séquence d'essais. 28
9 Évaluation d’essai . 28
Bibliographie . 30
Tableau 1 – Critères généraux de défaillances mécaniques . 23
Tableau 2 – Critères de défaillances électriques . 24
Tableau 3 – Conditions d’essais . 26
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
COMPOSANTS INDUCTIFS – GESTION DE LA FIABILITÉ
AVANT-PROPOS
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l’objet de droits de brevet. L’IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits
de brevets et de ne pas avoir signalé leur existence.
La Norme internationale IEC 62211 a été établie par le comité d'études 51 de l'IEC:
Composants magnétiques, ferrites et matériaux en poudre magnétique.
Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition
constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition
précédente:
a) Intégration du choc continu et du choc mécanique dans les conditions d’essai;
b) Modification des références normatives dans le Tableau 3.
– 18 – IEC 62211:2017 © IEC 2017
La présente version bilingue (2020-08) correspond à la version anglaise monolingue publiée
en 2017-01.
La version française de cette norme n'a pas été soumise au vote. Cette publication a été
rédigée selon les Directives ISO/IEC, Partie 2.
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant la date de
stabilité indiquée sur le site web de l’IEC sous http://webstore.iec.ch dans les données
relatives à la publication recherchée. À cette date, la publication sera
• reconduite;
• supprimée
• remplacée par une édition révisée, ou
• amendée
...
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