EN IEC 62391-1:2022
(Main)Fixed electric double-layer capacitors for use in electric and electronic equipment - Part 1: Generic specification
Fixed electric double-layer capacitors for use in electric and electronic equipment - Part 1: Generic specification
IEC 62391-1:2022 applies to fixed electric double-layer capacitors (hereafter referred to as capacitors) mainly used in DC 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. This edition includes the following significant technical changes with respect to the previous edition:
The document has been completely restructured to comply with the ISO/IEC Directives, Part 2; a new technical categorization of test methods has been introduced and the test methods have been reorganized according to these new categories; tables, figures and references have been revised accordingly.
Calculation formula of charging/discharging efficiency in Annex D were divided into two cases: "Calculation assuming full charge and discharge" and "Calculation assuming incomplete charging and discharging due to internal resistance".
Elektrische Doppelschichtkondensatoren zur Verwendung in elektrischen und elektronischen Geräten - Teil 1: Fachgrundspezifikation
Condensateurs électriques fixes à double couche utilisés dans les équipements électriques et électroniques - Partie 1: Spécification générique
L’IEC 62391-1:2022 s’applique aux condensateurs électriques fixes à double couche (appelés ci-après condensateurs) principalement utilisés dans des circuits à courant continu d’équipements électriques et électroniques. La présente partie de l’IEC 62391 définit les termes normalisés, les procédures de contrôle et les méthodes d’essai utilisés dans les spécifications intermédiaires et particulières des composants électroniques dans le cadre de l’assurance de la qualité, ainsi qu’à d’autres fins. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
Le présent document a été intégralement restructuré pour satisfaire aux Directives ISO/IEC, Partie 2. De nouvelles catégories techniques des méthodes d’essai ont été introduites, les méthodes d’essai ayant été réorganisées en fonction de ces nouvelles catégories. Les tableaux, figures et références ont été révisés en conséquence.
Les formules de calcul de l’efficacité de charge/décharge de l’Annexe D ont été divisées en deux: "Calcul prenant pour hypothèse la pleine charge et la pleine décharge" et "Calcul prenant pour hypothèse une charge et une décharge incomplètes, dues à la résistance interne".
Nespremenljivi električni dvoplastni kondenzatorji za električno in elektronsko opremo - 1. del: Rodovna specifikacija (IEC 62391-1:2022)
Ta del standarda IEC 62391 se uporablja za nespremenljive električne dvoplastne kondenzatorje (v nadaljnjem besedilu kondenzatorje), ki se uporabljajo za električno in elektronsko opremo v omrežjih z enosmerno napetostjo.
Ta del standarda IEC 62391 določa splošne pogoje, inšpekcijske postopke in preskusne metode za uporabo v sekcijskih in podrobnih specifikacijah elektronskih komponent za oceno kakovosti ali kateri koli drug namen.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2023
Nadomešča:
SIST EN 62391-1:2016
SIST EN 62391-1:2016/AC:2017
SIST EN 62391-1:2016/AC:2019
Nespremenljivi električni dvoplastni kondenzatorji za električno in elektronsko
opremo - 1. del: Rodovna specifikacija (IEC 62391-1:2022)
Fixed electric double-layer capacitors for use in electric and electronic equipment - Part
1: Generic specification (IEC 62391-1:2022)
Elektrische Doppelschichtkondensatoren zur Verwendung in elektrischen und
elektronischen Geräten - Teil 1: Fachgrundspezifikation (IEC 62391-1:2022)
Condensateurs électriques fixes à double couche utilisé dans les équipements
électriques et électroniques - Partie 1: Spécification générique (IEC 62391-1:2022)
Ta slovenski standard je istoveten z: EN IEC 62391-1:2022
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 IEC 62391-1
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2022
ICS 31.060.10 Supersedes EN 62391-1:2016;
EN 62391-1:2016/AC:2016-12;
EN 62391-1:2016/AC:2019-08
English Version
Fixed electric double-layer capacitors for use in electric and
electronic equipment - Part 1: Generic specification
(IEC 62391-1:2022)
Condensateurs électriques fixes à double couche utilisés Elektrische Doppelschichtkondensatoren zur Verwendung
dans les équipements électriques et électroniques - Partie in elektrischen und elektronischen Geräten - Teil 1:
1: Spécification générique Fachgrundspezifikation
(IEC 62391-1:2022) (IEC 62391-1:2022)
This European Standard was approved by CENELEC on 2022-11-24. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62391-1:2022 E
European foreword
The text of document 40/2966/FDIS, future edition 3 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 IEC 62391-1:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-08-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-11-24
document have to be withdrawn
This document supersedes EN 62391-1:2016 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62391-1:2022 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 standard indicated:
IEC 60027 (series) NOTE Harmonized as EN 60027 (series)
IEC 60068-2-47:2005 NOTE Harmonized as EN 60068-2-47:2005 (not modified)
IEC 60301:2012 NOTE Harmonized as EN 60301:2012 (not modified)
IEC 60384-1:2021 NOTE Harmonized as EN IEC 60384-1:2021 (not modified)
IEC 60695-2-11 NOTE Harmonized as EN IEC 60695-2-11
IEC 61881-3:2012 NOTE Harmonized as EN 61881-3:2012 (not modified)
IEC 62391-1:2015 NOTE Harmonized as EN 62391-1:2016 (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 62576:2018 NOTE Harmonized as EN IEC 62576:2018 (not modified)
ISO 80000-1:2009 NOTE Harmonized as EN ISO 80000-1:2013 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where 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 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 - Part 1: General EN 60068-1 2014
and guidance
IEC 60068-2-1 2007 Environmental testing - Part 2-1: Tests - EN 60068-2-1 2007
Test A: Cold
IEC 60068-2-2 2007 Environmental testing - Part 2-2: Tests - EN 60068-2-2 2007
Test B: Dry heat
IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - EN 60068-2-6 -
Test Fc: Vibration (sinusoidal)
IEC 60068-2-14 - Environmental testing - Part 2-14: Tests - EN 60068-2-14 -
Test N: Change of temperature
IEC 60068-2-20 - Environmental testing - Part 2-20: Tests - EN IEC 60068-2-20 -
Test Ta and Tb: Test methods for
solderability and resistance to soldering
heat of devices with leads
IEC 60068-2-21 - Environmental testing - Part 2-21: Tests - EN IEC 60068-2-21 -
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 60068-2-58 - Environmental testing - Part 2-58: Tests - EN 60068-2-58 -
Test Td: Test methods for solderability,
resistance to dissolution of metallization
and to soldering heat of surface mounting
devices (SMD)
IEC 60068-2-69 - Environmental testing - Part 2-69: Tests - EN 60068-2-69 -
Test Te/ Tc: Solderability testing of
electronic components and printed boards
by the wetting balance (force
measurement) method
IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - EN 60068-2-78 -
Test Cab: Damp heat, steady state
IEC 60294 - Measurement of the dimensions of a EN 60294 -
cylindrical component with axial
terminations
IEC 60695-11-5 - Fire hazard testing - Part 11-5: Test flames EN 60695-11-5 -
- Needle-flame test method - Apparatus,
confirmatory test arrangement and
guidance
IEC 60717 - Method for the determination of the space EN 60717 -
required by capacitors and resistors with
unidirectional terminations
IEC 61193-2 - Quality assessment systems - Part 2: EN 61193-2 -
Selection and use of sampling plans for
inspection of electronic components and
packages
IEC 62391-1 ®
Edition 3.0 2022-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fixed electric double-layer capacitors for use in electric and electronic
equipment –
Part 1: Generic specification
Condensateurs électriques fixes à double couche utilisés dans les équipements
électriques et électroniques –
Partie 1: Spécification générique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.060.10 ISBN 978-2-8322-5729-6
– 2 – IEC 62391-1:2022 © IEC 2022
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 General requirements . 15
4.1 Unit and symbols . 15
4.2 Preferred values and class . 15
4.2.1 General . 15
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
5 General provisions for tests and measurement procedures . 16
5.1 General . 16
5.2 Test and measurement requirements . 16
5.2.1 Test conditions . 16
5.2.2 Measurement conditions . 16
5.2.3 Voltage treatment . 16
5.2.4 Thermal treatment . 16
5.3 Drying . 16
5.4 Storage . 17
5.4.1 Storage at high temperature . 17
5.4.2 Storage at low temperature . 17
6 Electrical tests and measurements . 17
6.1 Measurement method 1 for capacitance and internal resistance (constant
current discharge) . 17
6.1.1 Basic circuit for measuring . 17
6.1.2 Measuring equipment . 18
6.1.3 Measurement procedure . 19
6.1.4 Calculation methods for capacitance . 21
6.1.5 Calculation methods for internal resistance. 22
6.1.6 Conditions to be prescribed in the detail specification . 23
6.2 Measurement method 2 for capacitance and internal resistance . 23
6.2.1 Constant resistance charging method for capacitance measurement . 23
6.2.2 AC internal resistance measurement method . 24
6.3 Leakage current . 24
6.3.1 Measurement method . 24
6.3.2 Items to be specified in the detail specification . 26
6.4 Maintain voltage. 26
6.4.1 Measurement method . 26
6.4.2 Calculation of voltage maintenance rate . 27
6.4.3 Conditions to be prescribed in the detail specification . 27
7 Mechanical tests and measurements . 27
7.1 Visual examination and check of dimensions . 27
7.1.1 Visual examination . 27
IEC 62391-1:2022 © IEC 2022 – 3 –
7.1.2 Dimensions (gauging) . 27
7.1.3 Dimensions (detail) . 28
7.2 Robustness of terminations . 28
7.2.1 Test Ua1 – Tensile . 28
7.2.2 Test Ub – Bending (half of the sample) . 28
7.2.3 Test Uc – Torsion (remaining sample) . 28
7.2.4 Test Ud – Torque (for terminations with threaded studs or screws and
for integral mounting devices) . 28
7.2.5 Visual examination . 29
7.3 Vibration . 29
7.3.1 Initial measurement . 29
7.3.2 Test . 29
7.3.3 Final measurement and requirements . 29
8 Environmental and climatic tests . 29
8.1 Rapid change of temperature . 29
8.1.1 Initial measurement . 29
8.1.2 Test . 29
8.1.3 Final inspection, measurements and requirements. 29
8.2 Damp heat, steady state . 30
8.2.1 Initial measurement . 30
8.2.2 Test . 30
8.2.3 Final measurement . 30
8.3 Endurance . 30
8.3.1 Initial measurements . 30
8.3.2 Test . 30
8.3.3 Final measurement, inspection and requirements . 30
8.4 Characteristics at high and low temperature . 31
8.4.1 General . 31
8.4.2 Test procedure . 31
8.4.3 Dry heat . 31
8.4.4 Cold. 31
8.4.5 Final measurement and requirements . 31
9 Tests related to component assembly . 31
9.1 Resistance to soldering heat . 31
9.1.1 Preconditioning and initial measurement . 31
9.1.2 Test . 31
9.1.3 Recovery . 32
9.1.4 Final inspection, measurements and requirements. 32
9.2 Solderability . 32
9.2.1 General . 32
9.2.2 Preconditioning . 32
9.2.3 Capacitors with leads . 32
9.2.4 Surface mount capacitors . 33
9.3 Component solvent resistance . 33
9.3.1 Initial measurements . 33
9.3.2 Test . 33
9.3.3 Requirements . 33
9.4 Solvent resistance of marking . 34
9.4.1 Test . 34
– 4 – IEC 62391-1:2022 © IEC 2022
9.4.2 Requirements . 34
10 Tests related to safety . 34
10.1 Passive flammability . 34
10.1.1 Test procedure . 34
10.1.2 Requirements . 34
10.2 Pressure relief (if applicable) . 35
10.2.1 Test . 35
10.2.2 Requirements . 35
11 Quality assessment procedures . 35
Annex A (normative) Classification according to capacitance and internal resistance . 36
A.1 General . 36
A.2 Classification by capacitance and internal resistance . 36
Annex B (informative) Measurement method of capacitance and low resistance by low
frequency AC method (reference) . 38
B.1 General . 38
B.2 Measurement system . 38
B.3 Calculation of capacitance . 38
B.4 Measurement conditions . 39
Annex C (informative) Thermal equilibrium time of capacitors . 40
C.1 General . 40
C.2 Thermal equilibrium time of capacitors . 40
Annex D (informative) Charging/discharging efficiency and measurement current . 42
D.1 General . 42
D.2 Charging efficiency, discharging efficiency, and current . 42
D.2.1 Calculation assuming full charge and discharge . 42
D.2.2 Calculation assuming incomplete charging and discharging due to
internal resistance . 43
Annex E (informative) Procedures for setting the measurement current of capacitor
with uncertain nominal internal resistance . 46
E.1 General . 46
E.2 Current setting procedures for measurement of capacitor . 46
E.3 Example of a current setting for determining capacitor characteristics . 46
Annex F (informative) Policy on uncertainty of measurement and inset limits . 47
F.1 Objective . 47
F.2 Calculation of measurement uncertainty . 47
F.3 Policy . 47
F.4 Calculation of inset and outset limits . 47
F.5 Examples . 48
F.5.1 General . 48
F.5.2 Example 1: Resistor measurement . 48
F.5.3 Example 2: Resistor measurement . 48
F.5.4 Example 3: Transistor measurement (gain) . 48
F.5.5 Example 4: Comparison between initial and final measurement results . 48
Annex Q (normative) Quality assessment procedures . 49
Q.1 General . 49
Q.1.1 Overview . 49
Q.1.2 Applicability of qualification approval . 49
Q.1.3 Applicability of capability approval . 49
IEC 62391-1:2022 © IEC 2022 – 5 –
Q.1.4 Applicability of technology approval . 50
Q.2 Primary stage of manufacture . 50
Q.3 Subcontracting . 50
Q.4 Structurally similar components . 50
Q.5 Qualification approval procedures . 50
Q.5.1 Eligibility for qualification approval . 50
Q.5.2 Application for qualification approval . 51
Q.5.3 Test procedure for qualification approval . 51
Q.5.4 Granting of qualification approval . 51
Q.5.5 Maintenance of qualification approval . 51
Q.5.6 Quality conformance inspection . 51
Q.6 Capability approval procedures . 51
Q.6.1 General . 51
Q.6.2 Eligibility for capability approval . 52
Q.6.3 Application for capability approval . 52
Q.6.4 Description of capability . 52
Q.6.5 Demonstration and verification of capability . 53
Q.6.6 Programme for capability approval . 53
Q.6.7 Capability approval test report . 54
Q.6.8 Abstract of description of capability . 54
Q.6.9 Modifications likely to affect the capability approval . 54
Q.6.10 Initial capability approval . 54
Q.6.11 Granting of capability approval . 55
Q.6.12 Maintenance of capability approval . 55
Q.6.13 Extension of capability approval . 56
Q.6.14 Quality conformance inspection . 56
Q.7 Rework and repair. 56
Q.7.1 Rework . 56
Q.7.2 Repair . 57
Q.8 Release for delivery . 57
Q.8.1 General . 57
Q.8.2 Release for delivery under qualification approval before the completion
of group B tests . 57
Q.9 Certified test records of released lots . 57
Q.10 Delayed delivery . 57
Q.11 Alternative test methods . 57
Q.12 Manufacture outside the geographical limits of IECQ CBs . 57
Q.13 Unchecked parameters . 57
Q.14 Technology approval procedures . 58
Q.14.1 General . 58
Q.14.2 Eligibility for technology approval . 58
Q.14.3 Application of technology approval . 58
Q.14.4 Description of technology . 58
Q.14.5 Demonstration and verification of the technology . 58
Q.14.6 Granting of technology approval . 58
Q.14.7 Maintenance of technology approval . 58
Q.14.8 Quality conformance inspection . 58
Q.14.9 Failure rate level determination. 59
Q.14.10 Outgoing quality level . 59
– 6 – IEC 62391-1:2022 © IEC 2022
Annex X (informative) Cross-references to IEC 62391-1:2015 . 60
Bibliography . 61
Figure 1 − Basic circuit for measuring . 18
Figure 2 – Voltage–time characteristics between capacitor terminals in capacitance
and internal resistance measurement . 19
Figure 3 − Circuit for constant resistance charging method . 23
Figure 4 − Circuit for AC resistance method . 24
Figure 5 – Circuit for measuring leakage currents . 25
Figure 6 − Diagram of current and voltage changes at the time of measuring the
leakage current . 26
Figure 7 − Maintain voltage test diagram . 27
Figure A.1 – Conceptual rendering orientated by characteristics in each classification . 37
Figure B.1 – Capacitance measurement system by the low frequency AC method . 38
Figure C.1 – Thermal equilibrium times of capacitors (from 85 °C to 25 °C) . 40
Figure C.2 – Thermal equilibrium times of capacitors (from −40 °C to 25 °C) . 41
Figure C.3 – Capacitor core temperature change with respect to time . 41
Figure Q.1 – General scheme for capability approval . 52
Table 1 – Measurement conditions for measurement method 1A . 20
Table 2 – Measurement conditions for measurement method 1B . 21
Table 3 – Tensile force . 28
Table 4 – Torque . 29
Table 5 – Severities and requirements . 35
Table A.1 – Electrical performance and measurement method by class . 37
Table E.1 – Example of setting current for measurement of capacitor . 46
Table X.1 – Cross-references to the previous edition . 60
IEC 62391-1:2022 © IEC 2022 – 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.
IEC 62391-1 has been prepared by IEC technical committee 40: Capacitors and resistors for
electronic equipment. It is an International Standard.
This third edition cancels and replaces the second edition published in 2015. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The document has been completely restructured to comply with the ISO/IEC Directives,
Part 2; a new technical categorization of test methods has been introduced and the test
methods have been reorganized according to these new categories; tables, figures and
references have been revised accordingly.
b) Calculation formula of charging/discharging efficiency in Annex D were divided into two
cases: "Calculation assuming full charge and discharge" and "Calculation assuming
incomplete charging and discharging due to internal resistance".
– 8 – IEC 62391-1:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
40/2966/FDIS 40/2976/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
A list of all parts in the IEC 62391 series, published under the general title Fixed electric
double-layer capacitors for use in electric and electronic equipment, can be found on the IEC
website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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 document 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 62391-1:2022 © IEC 2022 – 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
capacitors) mainly used in DC 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 are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
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, 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 60068-2-20, Environmental testing – Part 2-20: Tests – Test Ta and Tb: Test methods for
solderability and resistance to soldering heat of devices of with leads
IEC 60068-2-21, 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
IEC 60068-2-45:1980/AMD1:1993)
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 60068-2-69, Environmental testing – Part 2-69: Tests – Test Te/ Tc: Solderability testing
of electronic components and printed boards by the wetting balance (force measurement)
method
– 10 – IEC 62391-1:2022 © IEC 2022
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC 60294, Measurement of the dimensions of a cylindrical component with axial terminations
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
IEC 60717, 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 and the subordinate specifications, 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
active flammability
flammability (self-ignition) caused by
...
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