IEC 60115-1:1999

Fixed resistors for use in electronic equipment - Part 1: Generic specification

Establishes standard terms, inspection procedures and methods of test for use in sectional and detail specifications of electronic components for quality assessment or any other purpose.

General Information

• Status: Published
• Publication Date: 27-May-2001
• ICS: 31.040.10 - Fixed resistors
• Technical Committee: TC 40 - Capacitors and resistors for electronic equipment
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 21-Jul-2008

Relations

• Amended By: IEC 60115-1:1999/AMD1:2001 - Amendment 1 - Fixed resistors for use in electronic equipment - Part 1: Generic specification
• Effective Date: 05-Sep-2023
• Revised: IEC 60115-1:2008 - Fixed resistors for use in electronic equipment - Part 1: Generic specification
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL
IEC
STANDARD
60115-1
QC 400000
Third edition
1999-05
Fixed resistors for use in electronic equipment –
Part 1:
Generic specification
Résistances fixes utilisées dans les équipements
électroniques –
Partie 1:
Spécification générique
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are

available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base

publication incorporating amendments 1 and 2.

Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken by
the technical committee which has prepared this publication, as well as the list of
publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL
IEC
STANDARD
60115-1
QC 400000
Third edition
1999-05
Fixed resistors for use in electronic equipment –
Part 1:
Generic specification
Résistances fixes utilisées dans les équipements
électroniques –
Partie 1:
Spécification générique
 IEC 1999  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
V
International Electrotechnical Commission
For price, see current catalogue

– 2 – 60115-1 © IEC:1999(E)
CONTENTS
Page
FOREWORD . 4

Clause
1 General. 5

1.1 Scope . 5

1.2 Normative references. 5
2 Technical data. 7
2.1 Units and symbols. 7
2.2 Definitions. 7
2.3 Preferred values. 10
2.4 Marking. 10
2.5 Coding . 11
3 Quality assessment procedures. 11
3.1 General. 11
3.2 Primary stage of manufacture. 12
3.3 Subcontracting. 12
3.4 Structurally similar components. 12
3.5 Qualification approval procedures . 12
3.6 Capability approval procedures. 13
3.7 Rework and repair. 19
3.8 Release for delivery . 19
3.9 Certified test records of released lots . 19
3.10 Delayed delivery. 19
3.11 Alternative test methods. 19
3.12 Manufacture outside the geographical limits of IECQ NSIs. 20
3.13 Unchecked parameters . 20
4 Test and measurement procedures . 20
4.1 General. 20
4.2 Standard atmospheric conditions. 20
4.3 Drying . 21
4.4 Visual examination and checking of dimensions . 21

4.5 Resistance. 22
4.6 Insulation resistance (insulated styles only) . 22
4.7 Voltage proof . 25
4.8 Variation of resistance with temperature . 25
4.9 Reactance . 27
4.10 Non-linear properties. 28
4.11 Voltage coefficient. 28
4.12 Noise . 29
4.13 Overload . 29
4.14 Temperature rise. 29
4.15 Robustness of the resistor body . 30
4.16 Robustness of terminations . 30

60115-1 © IEC:1999(E) – 3 –
Clause Page
4.17 Solderability . 32

4.18 Resistance to soldering heat . 33

4.19 Rapid change of temperature . 34

4.20 Bump . 34

4.21 Shock . 34

4.22 Vibration . 34

4.23 Climatic sequence. 35

4.24 Damp heat, steady state. 36

4.25 Endurance . 37
4.26 Accidental overload test (for low-power non-wire-wound resistors only). 42
4.27 Single-pulse high-voltage overload test . 44
4.28 Periodic-pulse high-voltage overload test. 47
4.29 Component solvent resistance. 50
4.30 Solvent resistance of marking . 50
4.31 Mounting (for surface mount resistors only) . 50
4.32 Shear (adhesion) test. 53
4.33 Substrate bending test (formerly bond strength of the end face plating) . 53
Annex A (normative) Interpretation of sampling plans and procedures as described
in IEC 60410 for use within the IEC quality assessment system for
electronic components (IECQ). 54
Annex B (normative) Rules for the preparation of detail specifications for resistors and
capacitors for electronic equipment . 55
Annex C (informative) Example of test equipment for the periodic-pulse high-voltage
overload test . 56
Annex D (normative) Layout of the first page of a PCP/CQC specification. 57

– 4 – 60115-1 © IEC:1999(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 1: Generic specification
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 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 60115-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This third edition cancels and replaces the second edition published in 1982, amendment 2
(1987), amendment 3 (1989) and amendment 4 (1993).
The text of this standard is based on the following documents:
FDIS Report on voting
40/1087/FDIS 40/1109/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.
The QC number that appears on the front cover of this publication is the specification number
in the IEC Quality Assessment System for Electronic Components (IECQ).
Annexes A, B and D form an integral part of this standard.
Annex C is for information only.
A bilingual version of this standard may be issued at a later date.

60115-1 © IEC:1999(E) – 5 –
FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 1: Generic specification
1 General
1.1 Scope
This part of IEC 60115 is applicable to fixed resistors for use in electronic equipment.
It establishes standard terms, inspection procedures and methods of test for use in sectional
and detail specifications of electronic components for quality assessment or any other purpose.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60115. For dated references, subsequent amendments
to, or revisions of any of these publications do not apply. However, parties to agreements
based on this part of IEC 60115 are encourag
...

IEC 60115-1
Edition 3.1 2001-05
INTERNATIONAL
STANDARD
QC 400000
Fixed resistors for use in electronic equipment –
Part 1: Generic specification
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,

please contact the address below or your local IEC member National Committee for further information.

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IEC 60115-1
Edition 3.1 2001-05
INTERNATIONAL
STANDARD
QC 400000
Fixed resistors for use in electronic equipment –
Part 1: Generic specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
CP
ICS 31.040.10 ISBN 2-8318-5732-5

– 2 – 60115-1 © IEC:1999+A1:2001(E)

CONTENTS
FOREWORD.4

1 General .6

1.1 Scope.6

1.2 Normative references .6

2 Technical data .8

2.1 Units and symbols .8

2.2 Definitions .8

2.3 Preferred values .11
2.4 Marking .11
2.5 Coding.12
3 Quality assessment procedures .12
3.1 General .12
3.2 Primary stage of manufacture .13
3.3 Subcontracting .13
3.4 Structurally similar components .13
3.5 Qualification approval procedures .13
3.6 Capability approval procedures .14
3.7 Rework and repair .20
3.8 Release for delivery.20
3.9 Certified test records of released lots.20
3.10 Delayed delivery .20
3.11 Alternative test methods .20
3.12 Manufacture outside the geographical limits of IECQ NSIs .21
3.13 Unchecked parameters.21
4 Test and measurement procedures .21
4.1 General .21
4.2 Standard atmospheric conditions .21
4.3 Drying.22
4.4 Visual examination and checking of dimensions .22
4.5 Resistance .23
4.6 Insulation resistance (insulated styles only).23
4.7 Voltage proof.27
4.8 Variation of resistance with temperature .27
4.9 Reactance .29

4.10 Non-linear properties .30
4.11 Voltage coefficient .30
4.12 Noise.31
4.13 Overload .31
4.14 Temperature rise .31
4.15 Robustness of the resistor body.32
4.16 Robustness of terminations.32
4.17 Solderability.34
4.18 Resistance to soldering heat.34
4.19 Rapid change of temperature.35
4.20 Bump .36
4.21 Shock.36

60115-1 © IEC:1999+A1:2001(E) – 3 –

4.22 Vibration.36

4.23 Climatic sequence .37

4.24 Damp heat, steady state .38

4.25 Endurance.39

4.26 Accidental overload test (for low-power non-wire-wound resistors only) .44

4.27 Single-pulse high-voltage overload test .46

4.28 Periodic-pulse high-voltage overload test .49

4.29 Component solvent resistance .52

4.30 Solvent resistance of marking .52

4.31 Mounting (for surface mount resistors only).52

4.32 Shear (adhesion) test .55
4.33 Substrate bending test (formerly bond strength of the end face plating) .55
Annex A (normative) Interpretation of sampling plans and procedures as described in
IEC 60410 for use within the IEC quality assessment system for electronic components (IECQ).56
Annex B (normative) Rules for the preparation of detail specifications for resistors and
capacitors for electronic equipment .57
Annex C (informative) Example of test equipment for the periodic-pulse high-voltage
overload test .58
Annex D (normative) Layout of the first page of a PCP/CQC specification.59
Figure 1 – General scheme for capability approval.17
Figure 2 – Insulation resistance and voltage proof test jig for rectangular surface
mount resistors .25
Figure 3 – Insulation resistance and voltage proof test jig for cylindrical surface
mount resistors .26
Figure 4 – Test circuit .29
Figure 5 – Oscilloscope trace .30
Figure 6 – Testing of resistor body robustness.32
Figure 7 – Reference heat sink.42
Figure 8 – Gauze cylinder fixture .45
Figure 9 – Pulse generator 1,2/50.47
Figure 10 – Pulse generator 10/700.47
Figure 11 – Suitable substrate for mechanical and electrical tests
(may not be suitable for impedance measurements) .54
Figure 12 – Suitable substrate for electrical tests.54
Figure C.1 – Block diagram of test equipment.58

Figure C.2 – Tolerances on the pulse shape.58
Table 1 – Referee conditions.22
Table 2 – Measuring voltages.23
Table 3 – Calculation of resistance value (R) and change in resistance (ΔR) .28
Table 4 – Calculation of temperature differences (ΔΘ) .28
Table 5 – Tensile force for wire terminations .33
Table 6 – Torque.33
Table 7 – Number of cycles .37
Table 8 – Heat sink dimensions.42
Table 9 – Severities (see note 2) .48
Table 10 – List of preferred severities.51

– 4 – 60115-1 © IEC:1999+A1:2001(E)

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FIXED RESISTORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 1: Generic specification
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
...