EN 62391-1:2016

SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST EN 62391-1:2006
1HVSUHPHQOMLYLHOHNWULþQLGYRSODVWQLNRQGHQ]DWRUML]DHOHNWULþQRLQHOHNWURQVNR
RSUHPRGHO5RGRYQDVSHFLILNDFLMD
Fixed electric double-layer capacitors for use in elecric and electronic equipment - Part 1:
Generic specification
Condensateurs electriques fixes a double couche utilises dans les equipements
electriques et electroniques - Partie 1: Spécification générique
Ta slovenski standard je istoveten z: EN 62391-1:2016
ICS:
31.060.10 Fiksni kondenzatorji Fixed capacitors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62391-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2016
ICS 31.060.10 Supersedes EN 62391-1:2006
English Version
Fixed electric double-layer capacitors for use in electric and
electronic equipment - Part 1: Generic specification
(IEC 62391-1:2015)
Condensateurs électriques fixes à double couche utilisés Elektrische Doppelschichtkondensatoren zur Verwendung
dans les équipements électriques et électroniques - in elektrischen und elektronischen Geräten -
Partie 1: Spécification générique Teil 1: Fachgrundspezifikation
(IEC 62391-1:2015) (IEC 62391-1:2015)
This European Standard was approved by CENELEC on 2015-11-27. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62391-1:2016 E
European foreword
The text of document 40/2393/FDIS, future edition 2 of IEC 62391-1, prepared by
IEC/TC 40 "Capacitors and resistors for electronic equipment" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 62391-1:2016.

The following dates are fixed:
(dop) 2016-08-27
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-11-27
standards conflicting with the
document have to be withdrawn
This document supersedes EN 62391-1:2006.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62391-1:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60068-2-47:2005 NOTE Harmonized as EN 60068-2-47:2005 (not modified).
IEC 60384-1:2008 NOTE Harmonized as EN 60384-1:2009 (not modified).
IEC 61881-3:2012 NOTE Harmonized as EN 61881-3:2012 (not modified).
1)
IEC 62391-1:2006 NOTE Harmonized as EN 62391-1:2006 (not modified).
IEC 62391-2:2006 NOTE Harmonized as EN 62391-2:2006 (not modified).
IEC 62391-2-1:2006 NOTE Harmonized as EN 62391-2-1:2006 (not modified).
IEC 62576:2009 NOTE Harmonized as EN 62576:2010 (not modified).
ISO 80000-1:2009 NOTE Harmonized as EN ISO 80000-1:2013 (not modified).

1)
Superseded by EN 62391-1:2015 (IEC 62391-1:2015).
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year

IEC 60027 series Letter symbols to be used in electrical EN 60027 series
technology
IEC 60050 series International Electrotechnical Vocabulary - -
IEC 60062 -  Marking codes for resistors and capacitors EN 60062 -
IEC 60063 -  Preferred number series for resistors and EN 60063 -
capacitors
IEC 60068-1 2013 Environmental testing - EN 60068-1 2014
Part 1: General and guidance
IEC 60068-2-1 2007 Environmental testing - EN 60068-2-1 2007
Part 2-1: Tests - Test A: Cold
IEC 60068-2-2 2007 Environmental testing - EN 60068-2-2 2007
Part 2-2: Tests - Test B: Dry heat
IEC 60068-2-6 2007 Environmental testing - EN 60068-2-6 2008
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-14 2009 Environmental testing - EN 60068-2-14 2009
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-20 2008 Environmental testing - EN 60068-2-20 2008
Part 2-20: Tests - Test T: Test methods for
solderability and resistance to soldering
heat of devices with leads
IEC 60068-2-21 2006 Environmental testing - EN 60068-2-21 2006
Part 2-21: Tests - Test U: Robustness of
terminations and integral mounting devices
IEC 60068-2-45 1980 Basic environmental testing procedures - EN 60068-2-45 1992
Part 2-45: Tests - Test XA and guidance:
Immersion in cleaning solvents
+A1 1993  +A1 1993
IEC 60068-2-54 2006 Environmental testing - EN 60068-2-54 2006
Part 2-54: Tests - Test Ta: Solderability
testing of electronic components by the
wetting balance method
Publication Year Title EN/HD Year

IEC 60068-2-58 2015 Environmental testing - EN 60068-2-58 2015
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 60068-2-69 2007 Environmental testing - EN 60068-2-69 2007
Part 2: Tests - Test Te: Solderability
testing of electronic components for
surface mounting devices (SMD) by the
wetting balance method
IEC 60068-2-78 2012 Environmental testing - EN 60068-2-78 2013
Part 2-78: Tests - Test Cab: Damp heat,
steady state
IEC 60294 2012 Measurement of the dimensions of a EN 60294 2012
cylindrical component with axial
terminations
IEC 60617-DB -  Graphical symbols for diagrams - -
IEC 60695-11-5 -  Fire hazard testing - EN 60695-11-5 -
Part 11-5: Test flames - Needle-flame test
method - Apparatus, confirmatory test
arrangement and guidance
IEC 60717 2012 Method for the determination of the space EN 60717 2012
required by capacitors and resistors with
unidirectional terminations
IEC 61193-2 -  Quality assessment systems - EN 61193-2 -
Part 2: Selection and use of sampling
plans for inspection of electronic
components and packages
IEC 62391-1 ®
Edition 2.0 2015-10
INTERNATIONAL
STANDARD
colour
inside
Fixed electric double-layer capacitors for use in electric and electronic

equipment –
Part 1: Generic specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.060.10 ISBN 978-2-8322-2956-9

– 2 – IEC 62391-1:2015 © IEC 2015
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 General items . 14
4.1 Unit and symbols . 14
4.2 Preferred values and class . 14
4.2.1 General . 14
4.2.2 Preferred values of nominal capacitance . 15
4.2.3 Class . 15
4.3 Marking . 15
4.3.1 General . 15
4.3.2 Coding . 15
4.4 Quality assessment procedures . 15
5 Tests and measurement . 15
5.1 General . 15
5.2 Test and measurement requirements . 15
5.2.1 Test conditions . 15
5.2.2 Measurement conditions . 15
5.2.3 Voltage treatment . 16
5.2.4 Thermal treatment . 16
5.3 Drying . 16
5.4 Visual examination and check of dimensions . 16
5.4.1 Visual examination . 16
5.4.2 Dimensions (gauging) . 16
5.4.3 Dimensions (detail) . 16
5.5 Measurement method 1 for capacitance and internal resistance (constant
current discharge) . 16
5.5.1 Basic circuit for measuring . 16
5.5.2 Measuring equipment . 17
5.5.3 Measuring procedure . 18
5.5.4 Calculation methods for capacitance . 20
5.5.5 Calculation methods for internal resistance. 21
5.5.6 Conditions to be prescribed in the detail specification . 22
5.6 Measurement method 2 for capacitance and internal resistance . 22
5.6.1 Constant resistance charging method for capacitance measurement . 22
5.6.2 AC internal resistance measuring method . 23
5.7 Leakage current . 23
5.7.1 Measuring method . 23
5.7.2 Items to be specified in the detail specification . 24
5.8 Maintain voltage. 24
5.8.1 Measuring method . 24
5.8.2 Calculation of voltage maintenance rate . 25
5.8.3 Conditions to be prescribed in the detail specification . 25
5.9 Robustness of terminations . 25
5.9.1 Test Ua1 – Tensile . 25

IEC 62391-1:2015 © IEC 2015 – 3 –
5.9.2 Test Ub – Bending (half of the sample) . 25
5.9.3 Test Uc – Torsion (remaining sample) . 26
5.9.4 Test Ud – Torque (for terminations with threaded studs or screws and
for integral mounting devices) . 26
5.9.5 Visual examination . 26
5.10 Resistance to soldering heat . 26
5.10.1 Preconditioning and initial measurement . 26
5.10.2 Test . 26
5.10.3 Recovery . 26
5.10.4 Final inspection, measurements and requirements. 27
5.11 Solderability . 27
5.11.1 General . 27
5.11.2 Preconditioning . 27
5.11.3 Capacitors with leads . 27
5.11.4 Surface mount capacitors . 28
5.12 Rapid change of temperature . 28
5.12.1 Initial measurement . 28
5.12.2 Test . 28
5.12.3 Final inspection, measurements and requirements. 28
5.13 Vibration . 28
5.13.1 Initial measurement . 28
5.13.2 Test . 28
5.13.3 Final measurement and requirements . 29
5.14 Damp heat, steady state . 29
5.14.1 Initial measurement . 29
5.14.2 Test . 29
5.14.3 Final measurement . 29
5.15 Endurance . 29
5.15.1 Initial measurements . 29
5.15.2 Test . 29
5.15.3 Final measurement, inspection and requirements . 29
5.16 Storage . 30
5.16.1 Storage at high temperature . 30
5.16.2 Storage at low temperature . 30
5.17 Characteristics at high and low temperature . 30
5.17.1 General . 30
5.17.2 Test procedure . 30
5.17.3 Dry heat . 31
5.17.4 Cold. 31
5.17.5 Final measurement and requirements . 31
5.18 Component solvent resistance . 31
5.18.1 Initial measurements . 31
5.18.2 Test . 31
5.18.3 Requirements . 31
5.19 Solvent resistance of marking . 31
5.19.1 Test . 31
5.19.2 Requirements . 32
5.20 Passive flammability . 32
5.20.1 Test procedure . 32

– 4 – IEC 62391-1:2015 © IEC 2015
5.20.2 Requirements . 32
5.21 Pressure relief (if applicable) . 32
5.21.1 Test . 32
5.21.2 Requirements . 32
Annex A (normative) Classification according to capacitance and internal resistance . 33
A.1 General . 33
A.2 Classification by capacitance and internal resistance . 33
Annex B (informative) Measuring method of capacitance and low resistance by low
frequency a.c. method (reference) . 35
B.1 General . 35
B.2 Measuring system . 35
B.3 Calculation of capacitance . 35
B.4 Measuring conditions . 36
Annex C (informative) Thermal equilibrium time of capacitors . 37
C.1 General . 37
C.2 Thermal equilibrium time of capacitors . 37
Annex D (informative) Charging/discharging efficiency and measurement current . 39
D.1 General . 39
D.2 Charging efficiency, discharging efficiency, and current . 39
Annex E (informative) Procedures for setting the measurement current of capacitor
with uncertain nominal internal resistance . 41
E.1 General . 41
E.2 Current setting procedures for measurement of capacitor . 41
E.3 Example of setting current for determining capacitor characteristics . 41
Annex F (informative) Policy on uncertainty of measurement and inset limits . 42
F.1 Objective . 42
F.2 Terms and definitions . 42
F.3 Calculation of measurement uncertainty . 42
F.4 Policy . 43
F.5 Calculation of inset and outset limits . 43
F.6 Examples . 43
F.6.1 General . 43
F.6.2 Example 1: Resistor measurement . 43
F.6.3 Example 2: Resistor measurement . 44
F.6.4 Example 3: Transistor measurement (gain) . 44
F.6.5 Example 4: Comparison between initial and final measurement results . 44
Annex G (informative) Reference to IEC 62391-1:2006 . 45
Annex Q (normative) Quality assessment procedures . 46
Q.1 General . 46
Q.1.1 Overview . 46
Q.1.2 Applicability of qualification approval . 46
Q.1.3 Applicability of capability approval . 46
Q.1.4 Applicability of technology approval . 47
Q.2 Primary stage of manufacture . 47
Q.3 Subcontracting . 47
Q.4 Structurally similar components . 47
Q.5 Qualification approval procedures . 47
Q.5.1 Eligibility for qualification approval . 47

IEC 62391-1:2015 © IEC 2015 – 5 –
Q.5.2 Application for qualification approval . 48
Q.5.3 Test procedure for qualification approval . 48
Q.5.4 Granting of qualification approval . 48
Q.5.5 Maintenance of qualification approval . 48
Q.5.6 Quality conformance inspection . 48
Q.6 Capability approval procedures . 48
Q.6.1 General . 48
Q.6.2 Eligibility for capability approval . 49
Q.6.3 Application for capability approval . 49
Q.6.4 Description of capability . 49
Q.6.5 Demonstration and verification of capability . 50
Q.6.6 Programme for capability approval . 50
Q.6.7 Capability approval test report . 51
Q.6.8 Abstract of description of capability . 51
Q.6.9 Modifications likely to affect the capability approval . 51
Q.6.10 Initial capability approval . 51
Q.6.11 Granting of capability approval . 52
Q.6.12 Maintenance of capability approval . 52
Q.6.13 Extension of capability approval . 53
Q.6.14 Quality conformance inspection . 53
Q.7 Rework and repair. 53
Q.7.1 Rework . 53
Q.7.2 Repair . 54
Q.8 Release for delivery . 54
Q.8.1 General . 54
Q.8.2 Release for delivery under qualification approval before the completion
of Group B tests . 54
Q.9 Certified test records of released lots . 54
Q.10 Delayed delivery . 54
Q.11 Alternative test methods . 54
Q.12 Manufacture outside the geographical limits of IECQ CBs . 54
Q.13 Unchecked parameters . 54
Q.14 Technology approval procedures . 55
Q.14.1 General . 55
Q.14.2 Eligibility for technology approval . 55
Q.14.3 Application of technology approval . 55
Q.14.4 Description of technology . 55
Q.14.5 Demonstration and verification of the technology . 55
Q.14.6 Granting of technology approval . 55
Q.14.7 Maintenance of technology approval . 55
Q.14.8 Quality conformance inspection . 55
Q.14.9 Failure rate level determination. 56
Q.14.10 Outgoing quality level . 56
Bibliography . 57

Figure 1 − Basic circuit for measuring . 17
Figure 2 – Voltage–time characteristics between capacitor terminals in capacitance
and internal resistance measurement . 18
Figure 3 − Circuit for constant resistance charging method . 22

– 6 – IEC 62391-1:2015 © IEC 2015
Figure 4 − Circuit for a.c. resistance method . 23
Figure 5 − Maintain voltage test diagram . 24
Figure A.1 – Conceptual rendering orientated by characteristics in each classification . 34
Figure B.1 – Capacitance measuring system by the low frequency a.c. method . 35
Figure C.1 – Thermal equilibrium times of capacitors (from 85 °C to 25 °C) . 37
Figure C.2 – Thermal equilibrium times of capacitors (from −40 °C to 25 °C) . 38
Figure C.3 – Capacitor core temperature change with respect to time . 38
Figure Q.1 – General scheme for capability approval . 49

Table 1 – Measuring conditions for measuring method 1A . 19
Table 2 – Measuring conditions for measuring method 1B . 20
Table 3 – Tensile force . 25
Table 4 – Torque . 26
Table 5 – Severities and requirements . 32
Table A.1 – Electrical performance and measuring method by class . 34
Table E.1 – Example of setting current for measurement of capacitor . 41

IEC 62391-1:2015 © IEC 2015 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED ELECTRIC DOUBLE-LAYER CAPACITORS
FOR USE IN ELECTRIC AND ELECTRONIC EQUIPMENT –

Part 1: Generic specification
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 62391-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This second edition cancels and replaces the first edition published in 2006 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) enhancement of the scope to include electric (high power) application;
b) implementation of Annex Q, replacing Clause 3 in the first edition;
c) in addition, minor revisions related to tables, figures and references.

– 8 – IEC 62391-1:2015 © IEC 2015
The text of this standard is based on the following documents:
FDIS Report on voting
40/2393/FDIS 40/2415/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.
A list of all parts of IEC 62391 under the general title Fixed electric double-layer capacitors for
use in electric and electronic equipment can be found in 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.
A bilingual version of this publication may be issued at a later date.

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.
IEC 62391-1:2015 © IEC 2015 – 9 –

FIXED ELECTRIC DOUBLE-LAYER CAPACITORS
FOR USE IN ELECTRIC AND ELECTRONIC EQUIPMENT –

Part 1: Generic specification
1 Scope
This part of IEC 62391 applies to fixed electric double-layer capacitors (hereafter referred to
as capacitor(s)) mainly used in d.c. circuits of electric and electronic equipment.
This part of IEC 62391 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.
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 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60050 (all parts), International Electrotechnical Vocabulary
IEC 60062, Marking codes for resistors and capacitors
IEC 60063, Preferred number series for resistors and capacitors
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Tests A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Tests B: Dry Heat
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-14:2009, Environmental testing – Part 2-14: Tests – Test N: Change of
temperature
IEC 60068-2-20:2008, Environmental testing – Part 2-20: Tests – Test T: Test methods for
solderability and resistance to soldering heat of devices of with leads
IEC 60068-2-21:2006, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices
IEC 60068-2-45:1980, Environmental testing – Part 2-45: Tests – Test XA and guidance:
Immersion in cleaning solvents
Amendment 1:1993)
– 10 – IEC 62391-1:2015 © IEC 2015
IEC 60068-2-54:2006, Environmental testing – Part 2-54: Tests – Test Ta: Solderbility
testing of electronic components by the wetting balance method
IEC 60068-2-58:2015, 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 60068-2-69:2007, Environmental testing – Part 2-69: Tests – Test Te: Solderability
testing of electronic components for surface mounting devices (SMD) by the wetting balance
method
IEC 60068-2-78:2012, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,
steady state
IEC 60294:2012, Measurement of the dimensions of a cylindrical component with axial
terminations
IEC 60617 (all parts), Graphical symbols for diagrams
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
IEC 60717:2012, Method for the determination of the space required by capacitors and
resistors with unidirectional terminations
IEC 61193-2, Quality assessment systems – Part 2: Selection and use of sampling plans for
inspection of electronic components and packages
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
3.1
type
group of components having similar design features and manufacturing techniques, enabling
them to be considered together, either for qualification approval or for quality conformance
inspection
Note 1 to entry: In some cases, components described in several detail specifications may be considered as
belonging to the same type.
[SOURCE: IEC 60384-1:2008, 2.2.39 – modified, the remark on "single detail specification"
was deleted from the definition and the Note was rephrased.]
3.2
style
subdivision of a type, generally based on dimensional factors
Note 1 to entry: A style may include several variants, generally of a mechanical order.
3.3
class
classification of the capacitor by the capacitance value and the internal resistance value
depending upon the application

IEC 62391-1:2015 © IEC 2015 – 11 –
3.4
family
group of components which predominantly displays a particular
physical attribute and/or fulfils a defined function
3.5
subfamily
group of components within a family manufactured by similar
technological methods
3.6
d.c. capacitor
capacitor designed essentially for application with direct voltage
Note 1 to entry: A d.c. capacitor may not be suitable for use on a.c. supplies.
3.7
nominal capacitance
C
N
designated capacitance value usually indicated on the capacitor
3.8
category temperature range
range of ambient temperatures for which the capacitor has been designed to operate
continuously
Note 1 to entry: This is given by the lower and upper category temperature.
3.9
lower category temperature
minimum ambient temperature for which a capacitor has been designed to operate
continuously
3.10
upper category temperature
highest ambient temperature including internal heating in which a capacitor is designed to
operate continuously
[SOURCE: IEC 61881-3:2012, 3.17, modified – The note to entry has been deleted.]
3.11
rated temperature
maximum ambient temperature at which the rated voltage may be continuously applied
3.12
rated voltage
U
R
maximum d.c. voltage or peak value of pulse voltage which may be applied continuously or
repetitively to a capacit
...