IEC 60384-26:2018

IEC 60384-26 ®
Edition 2.0 2018-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fixed capacitors for use in electronic equipment –
Part 26: Sectional specification – Fixed aluminium electrolytic capacitors with
conductive polymer solid electrolyte

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IEC 60384-26 ®
Edition 2.0 2018-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fixed capacitors for use in electronic equipment –

Part 26: Sectional specification – Fixed aluminium electrolytic capacitors with

conductive polymer solid electrolyte

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.060.50 ISBN 978-2-8322-5737-1

– 2 – IEC 60384-26:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 6
1 General . 8
1.1 Scope . 8
1.2 Object . 8
1.3 Normative references . 8
1.4 Information to be given in a detail specification . 9
1.4.1 General . 9
1.4.2 Outline drawings and dimensions . 9
1.4.3 Mounting . 9
1.4.4 Rating and characteristics . 10
1.4.5 Marking . 10
1.5 Terms and definitions . 10
1.6 Marking . 10
1.6.1 General . 10
1.6.2 Information for marking . 11
1.6.3 Marking on capacitors . 11
Additional markings .
1.6.4 Marking on package packaging . 11
2 Preferred ratings and characteristics . 11
2.1 Preferred characteristics . 11
Preferred climatic categories .
2.2 Preferred values of ratings . 12
2.2.1 Nominal capacitance (C ) . 12
N
2.2.2 Tolerance on nominal capacitance . 12
2.2.3 Rated voltage (U ) . 12
R
2.2.4 Category voltage (U ) . 12
C
2.2.5 Surge voltage . 12
2.2.6 Rated temperature . 12
3 Quality assessment procedures . 13
3.1 Primary stage of manufacture . 13
3.2 Structurally similar components . 13
Declaration of conformity (basic requirements) .
Test schedule and requirement for initial assessment (mandatory and
optional tests) .
3.3 Certified test records of released lots . 13
3.4 Qualification approval (QA) procedures . 13
3.4.1 General . 13
3.4.2 Qualification approval on the basis of the fixed sample size procedures
sampling . 13
3.4.3 Tests . 14
3.5 Quality conformance inspection . 28
3.5.1 Formation of inspection lots . 28
3.5.2 The schedule . 29
3.5.3 Delayed delivery . 29
3.5.4 Assessment levels . 29
4 Test and measurement procedures . 32

4.1 Pre-conditioning (if required) . 32
4.2 Measuring conditions . 32
4.3 Visual examination and check of dimensions . 32
4.3.1 General . 32
4.3.2 Visual examination and check of dimensions . 32
4.3.3 Requirements . 32
4.4 Electrical tests . 32
4.4.1 Leakage current . 32
4.4.2 Capacitance . 33
4.4.3 Tangent of loss angle (tan δ) . 33
4.4.4 Equivalent series resistance (ESR) . 34
4.5 Robustness of terminations . 34
4.5.1 General . 34
4.5.2 Initial measurement inspection. 34
4.5.3 Final inspections and requirements . 34
4.6 Resistance to soldering heat . 34
4.6.1 General . 34
4.6.2 Initial measurement inspection. 34
4.6.3 Test conditions . 34
4.6.4 Final inspections, measurements and requirements . 35
4.7 Solderability . 35
4.7.1 General . 35
4.7.2 Test conditions . 35
4.7.3 Final inspections, measurements and requirements . 35
4.8 Rapid change of temperature . 35
4.8.1 General . 35
4.8.2 Initial measurement inspection. 35
4.8.3 Test conditions . 35
4.8.4 Recovery . 36
4.8.5 Final inspections, measurements and requirements . 36
4.9 Vibration . 36
4.9.1 General . 36
4.9.2 Test conditions . 36
4.9.3 Final inspections, measurements and requirements . 36
4.10 Shock . 36
4.10.1 General . 36
4.10.2 Test conditions . 36
4.10.3 Final inspections, measurements and requirements . 37
4.11 Bump . 37
4.11.1 General . 37
4.11.2 Test conditions . 37
4.11.3 Final examination, measurements inspections and requirements . 37
4.12 Climatic sequence. 37
4.12.1 General . 37
4.12.2 Initial measurement inspection. 37
4.12.3 Dry heat . 37
4.12.4 Damp heat, cyclic, Test Db, first cycle . 38
4.12.5 Cold. 38
4.12.6 Damp heat, cyclic, Test Db, remaining cycles . 38

– 4 – IEC 60384-26:2018 RLV © IEC 2018
4.12.7 Recovery . 38
4.12.8 Final inspections, measurements and requirements . 38
4.13 Damp heat, steady state . 38
4.13.1 General . 38
4.13.2 Initial measurement inspection. 38
4.13.3 Test conditions . 38
4.13.4 Recovery . 38
4.13.5 Final inspections, measurements and requirements . 38
4.14 Endurance . 39
4.14.1 General . 39
4.14.2 Initial measurement inspection. 39
4.14.3 Test conditions . 39
4.14.4 Recovery . 39
4.14.5 Final inspections, measurements and requirements . 39
4.15 Surge . 39
4.15.1 General . 39
4.15.2 Initial measurement inspection. 39
4.15.3 Test procedure conditions . 39
4.15.4 Recovery . 39
4.15.5 Final inspections, measurements and requirements . 40
4.16 Reverse voltage (if required by the detail specification) . 40
4.16.1 Initial measurement inspection. 40
4.16.2 Test procedure conditions . 40
4.16.3 Recovery . 40
4.16.4 Final inspections, measurements and requirements . 40
4.17 Component solvent resistance (if required by the detail specification) . 40
Test conditions .
4.18 Solvent resistance of the marking (if required by the detail specification) . 41
Test conditions .
4.19 Storage at high temperature . 41
4.19.1 General . 41
4.19.2 Initial measurement inspection. 41
4.19.3 Test conditions . 41
4.19.4 Recovery . 41
4.19.5 Final inspections, measurements and requirements . 41
4.20 Characteristics at high and low temperature . 41
4.20.1 General . 41
4.20.2 Measurements Inspections and requirements . 41
4.21 Charge and discharge (if required by the detail specification) . 41
4.21.1 General . 41
4.21.2 Initial measurement inspection. 42
4.21.3 Test procedure conditions . 42
4.21.4 Final inspections, measurements and requirements . 42
4.22 High surge current (if required by the detail specification) . 42
4.22.1 General . 42
4.22.2 Initial measurement inspection. 42
4.22.3 Final measurements inspections and requirements . 42
Bibliography . 43

Table 1 – Surge voltages . 12
Table 2 – Fixed sample size test Sampling plan for qualification approval, assessment
level EZ . 15
Table 3 – Test schedule for qualification approval (1 of 6) . 16
Table 4 – Test plan for Lot-by-lot inspection (Assessment level EZ) . 30
Table 5 – Test plan for Periodic inspection (Assessment level EZ) . 31

– 6 – IEC 60384-26:2018 RLV © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 26: Sectional specification – Fixed aluminium electrolytic
capacitors with conductive polymer solid electrolyte

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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
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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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

International Standard IEC 60384-26 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 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) revision of the structure in accordance with ISO/IEC Directives, Part 2:2016 to the extent
practicable, and harmonization between other similar kinds of documents;
b) in addition, Clause 4 and all the tables have been reviewed in order to prevent
duplications and contradictions.
The text of this International Standard is based on the following documents:
FDIS Report on voting
40/2599/FDIS 40/2605/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60384 series can be found, under the general title Fixed
capacitors for use in electronic equipment, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.
The contents of the corrigendum of April 2020 have been included in this copy.

– 8 – IEC 60384-26:2018 RLV © IEC 2018
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 26: Sectional specification – Fixed aluminium electrolytic
capacitors with conductive polymer solid electrolyte

1 General
1.1 Scope
This part of IEC 60384 is applicable applies to fixed aluminium electrolytic capacitors with
conductive polymer solid electrolyte primarily intended for d.c. applications for use in
electronic equipment.
NOTE Fixed aluminium electrolytic capacitors with solid (MnO ) electrolyte are covered by
IEC 60384-4 and IEC 60384-4-2. Surface mount Fixed aluminium electrolytic surface mount
capacitors with conductive polymer solid electrolyte are covered by IEC 60384-25 and
IEC 60384-25-1.
1.2 Object
The object of this document is to prescribe preferred ratings and characteristics and to select
from IEC 60384-1, the appropriate quality assessment procedures, tests and measuring
methods and to give general performance requirements for this type of capacitor. Test
severities and requirements prescribed in detail specifications referring to this sectional
specification shall be of equal or higher performance level, because lower performance levels
are not permitted.
1.3 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 60063:1963, Preferred number series for resistors and capacitors
Amendment 1 (1967)
Amendment 2 (1977)
IEC 60068-1:1988 2013, Environmental testing – Part 1: General and guidance
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 with leads
IEC 60384-1:2008 2016, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
IEC 60410:1973, sampling plans and procedures for inspection by attributes
_____________
For the tests in the IEC 60068 series of publication, the editions referenced in the applicable test clauses of the
generic specification shall be used.

IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 61193-2:2007, Quality assessment systems – Part 2: Selection and use of sampling plans
for inspection of electronic components and packages
ISO 3, Preferred numbers – Series of preferred numbers
1.4 Information to be given in a detail specification
1.4.1 General
Detail specifications shall be derived from the relevant blank detail specification.
Detail specifications shall not specify requirements inferior to those of the generic, sectional
or blank detail specification. When more severe requirements are included, they shall be
listed in 1.9 of the detail specification and indicated in the test schedules, for example by an
asterisk.
NOTE The information given in 1.4.2 may, for convenience, be presented in tabular form.
The following information shall be given in each detail specification and the values quoted
shall preferably be selected from those given in the appropriate clause of this sectional
specification.
1.4.2 Outline drawings and dimensions
There shall be an illustration of the capacitors as an aid to easy recognition and for
comparison of the capacitors with others. Dimensions and their associated tolerances, which
affect interchangeability and mounting, shall be given in the detail specification. All
dimensions shall preferably be stated in millimetres; however, when the original dimensions
are given in inches, the converted metric dimensions in millimetres shall be added.
Normally the numerical values shall be given for cylindrical types, the body diameter, and the
length and diameter, and the spacing of the terminations. When necessary, for example when
a number of items (capacitance values/voltage ranges) are covered by a detail specification,
the dimensions and their associated tolerances shall be placed in a table below the drawing.
The numerical values of the body shall be given as follows:
– general case: width, length and height;
– for cylindrical body: diameter and length.
The numerical values of the terminals shall be given as follows:
– for leaded terminals: diameter, length and spacing.
When the configuration is other than described above, the detail specification shall state such
dimensional information as will adequately describe the capacitor. When the capacitor is not
designed for use on printed boards, this shall be clearly stated in the detail specification.
1.4.3 Mounting
The detail specification shall specify the method of mounting to be applied for normal use and
for the application of the vibration and the bump or shock tests. The capacitors shall be
mounted by their normal means. The design of the capacitor may be such that special
mounting fixtures are required in its use. In this case, the detail specification shall describe
the mounting fixtures and they shall be used in the application of the vibration and bump or
shock tests.
– 10 – IEC 60384-26:2018 RLV © IEC 2018
1.4.4 Rating and characteristics
1.4.4.1 General
The ratings and characteristics shall be given in accordance with the relevant subclauses of
this sectional specification, including the items specified in 1.4.4.2 to 1.4.4.4.
1.4.4.2 Nominal capacitance range
See 2.2.1.
NOTE When products approved to the detail specification have different nominal capacitance
ranges, the following statement should be added:
"The range of values available in each voltage range is given in QPL (qualified products list)."
"The nominal capacitance range available in each voltage range is given in the register of
approvals, available for example on the website www.iecq.org".
1.4.4.3 Particular characteristics
Additional characteristics may be listed when they are considered necessary to specify
adequately the component for design and application purposes.
1.4.4.4 Soldering
The detail specification shall prescribe specify the test methods, severities and requirements
applicable for the solderability and the resistance to soldering heat tests.
1.4.5 Marking
The detail specification shall specify the content of the marking on the capacitor and on the
package packaging. Any deviations from 1.6 of this sectional specification shall be specifically
stated in the detail specification.
1.5 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60384-1:2016 and
the following 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
1.5.1
capacitance
capacitance of an equivalent circuit having capacitance and
resistance in series measured with alternating current approximately sinusoidal waveform at a
specified frequency
1.6 Marking
1.6.1 General
See IEC 60384-1:2016, 2.4, with 1.6.2, 1.6.3 and 1.6.4 of this document.

1.6.2 Information for marking
Information given in the marking is normally selected from the following list; the relative
importance of each item is indicated by its position in the list:
a) polarity of the terminations;
b) nominal capacitance;
c) rated voltage (d.c. voltage may be indicated by the symbol:    (IEC 60417-5031-2002-10)
or     );
d) year and month (or, year and week) of manufacture;
d) manufacturer’s name and/or trade mark;
e) tolerance on nominal capacitance;
f) climatic category temperature;
g) manufacturer’s type designation;
h) reference to the detail specification.
1.6.3 Marking on capacitors
The capacitor shall be clearly marked with a), b), c), d), e) and f) above with as many as
possible of the remaining items as is considered necessary. Any duplication of information in
the marking on the capacitor shall be avoided.
Polarity of the terminations shall be marked. The other information listed in 1.6.2 is marked as
necessary.
Any marking shall be legible and not easily smeared or removed by rubbing with a finger.
1.6.4 Marking on package packaging
The package packaging containing the capacitors shall should be clearly marked with all the
information listed in 1.6.2 as necessary.
1.6.4 Additional markings
Any additional marking shall be so applied that no confusion can arise.
2 Preferred ratings and characteristics
2.1 Preferred characteristics
The values given in the detail specification shall preferably be selected from the following:
2.1.1 Preferred climatic categories
Preferred climatic categories only shall be given in the preferred characteristics.
The capacitors covered by this sectional specification are classified into climatic categories in
accordance with the general rules given in IEC 60068-1:2013, Annex A.
The lower and upper category temperatures and the duration of the damp heat, steady state
test shall be chosen taken from the following:
– lower category temperature: −55 °C;
– upper category temperature: +105 °C and +125 °C.
Duration of the damp heat, steady state test:  21 days

– 12 – IEC 60384-26:2018 RLV © IEC 2018
The severities for the cold and dry heat tests are the lower and upper category temperatures
respectively.
2.2 Preferred values of ratings
2.2.1 Nominal capacitance (C )
N
Preferred values of nominal capacitance shall be expressed are indicated in microfarad (µF).
Preferred values of nominal capacitance are the values shall be taken from the E6 and E12
series of IEC 60063 as follows:
1,0 – 1,2 – 1,5 – 1,8 – 2,2 – 2,7 – 3,3 – 3,9 – 4,7 – 5,6 – 6,8 – 8,2;
n
and their decimal multiples (× 10 , n: integer).
2.2.2 Tolerance on nominal capacitance
Preferred values of tolerance on nominal capacitance are:
± 10 % and ± 20 %.
2.2.3 Rated voltage (U )
R
Preferred values of rated direct d.c. voltages taken from the R10 and R20 series of ISO 3 are:
– from R10: 1,0 – 1,25 – 1,6 – 2,0 – 2,5 – 3,15 – 4,0 – 5,0 – 6,3 – 8,0;
– from R20: 3,5 – 4,5;
n
– and their decimal multiples (× 10 , n: integer).
2.2.4 Category voltage (U )
C
The category voltage is equal to the rated voltage.
2.2.5 Surge voltage
The surge voltage shall be 1,15 times the rated voltage rounded off (significant digit of 2) to
the nearest volt (see Table 1).
Table 1 – Surge voltages
Values in volts
Rated voltage 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35 50
Surge voltage 2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40 58

2.2.6 Rated temperature
The value of the rated temperature shall be upper category temperature.
_____________
ISO 3 indicates the value 3,55 for R20.

3 Quality assessment procedures
3.1 Primary stage of manufacture
The primary stage of manufacture is the capacitor manufacturer's evaluation of the formed
anode foil.
3.2 Structurally similar components
Capacitors, considered as being structurally similar, are capacitors produced with similar
processes and materials, though they may be of different case sizes and values.
3.3 Declaration of conformity (basic requirements)
3.4 Test schedule and requirement for initial assessment (mandatory and optional
tests)
3.3 Certified test records of released lots
The information required in IEC 60384-1:2016, Q.1.5, shall be made available when
prescribed in the detail specification and when requested by a purchaser. After the endurance
test, the required parameters are the capacitance change, tangent of loss angle or equivalent
series resistance, and leakage current.
3.4 Qualification approval (QA) procedures
3.4.1 General
The procedures for qualification approval testing are given in IEC 60384-1:2016, Clause Q.2.
The schedule to be used for qualification approval testing on the basis of lot-by-lot and
periodic tests is given in 3.5. The procedure using a fixed sample size schedule is given in
3.4.2 and 3.4.3.
3.4.2 Qualification approval on the basis of the fixed sample size procedures
sampling
The fixed sample size procedure is described in IEC 60384-1:2016, Q.2.4. The sample shall
be representative of the range of capacitors for which approval is sought. This may or may not
be the complete range covered by The sample may be the whole or the part of the range
given in the detail specification.
The sample shall consist of specimens of capacitors of maximum and minimum size and for
each of these sizes the maximum capacitance value for the highest rated voltage and
minimum rated voltage of the voltage ranges for which approval is sought. When there are
more than four rated voltages, an intermediate voltage shall also be tested. Thus for the
approval of a range, testing is required of either four or six values (capacitance/voltage
combinations) for each temperature characteristic. Where the total range consists of less than
four values, the number of specimens to be tested shall be that required for four values.
In case assessment level EZ is used, spare specimens are permitted as follows:
The sample shall consist of four specimens having the maximum and minimum rated voltages
and, for these voltages, the maximum and minimum case size. When there are more than four
case sizes, an intermediate case size shall also be tested. In each of these case size/voltage
combinations (values), the maximum capacitance shall be chosen. Thus, for the approval of a
range, testing is required of either four or six values. Where the range consists of fewer than
four values, the number of specimens to be tested shall be that required for four values.

– 14 – IEC 60384-26:2018 RLV © IEC 2018
Two (for 6 values) or three (for 4 values) specimens per value which may be used as
replacements for specimens that are non-conforming because of incidents not attributable to
the manufacturer.
The numbers given in Group 0 assume that all groups are applicable. If this is not so, the
numbers may be reduced accordingly.
When additional groups are introduced into the qualification approval test schedule, the
number of specimens required for Group 0 shall be increased by the same number as that
required for the additional groups.
Table 2 gives the number of samples to be tested in each group or subgroup together with the
number of permissible non-conformances for qualification approval test.
3.4.3 Tests
The complete series of tests specified in Table 2 and Table 3 are required for the approval of
capacitors covered by a detail specification. The tests of each group shall be carried out in
the order given.
The whole sample shall be subjected to the tests of Group 0 and then divided for the other
groups.
Non-conforming (Table 2) specimens found during the tests of Group 0 shall not be used for
the other groups.
“One non-conforming item” is counted when a capacitor has not satisfied the whole or a part
of the tests of a group.
The approval is granted when the number or non-conforming items do not exceed the
specified number of permissible non-conforming items for each group or subgroup and the
total number of permissible non-conformances.
NOTE Table 2 and Table 3 together form the fixed sample size test schedule. Table 2 includes the details for the
sampling and permissible non-conforming items for the different tests or groups of tests. Table 3 together with the
details of the test contained in Clause 4 gives a complete summary of test conditions and performance requirements
and indicates where, for example for the test method or conditions of test, a choice has to be made in detail specification.
The conditions of test and performance requirements for the fixed sample size test schedule
shall be identical to those prescribed in the detail specification for quality conformance
inspection.
Specimens found to be non-conforming in the tests of Group 0 shall not be used for the other
groups.
Approval is granted when the number of non-conforming items is zero.
Table 2 and Table 3 together form the fixed sample size test schedule for the qualification
approval on the basis of the fixed sample size procedure. Table 2 gives the number of the
samples and permissible non-conforming items for each test or test group. Table 3 gives a
summary of the test conditions and performance requirements, and when a choice shall be
made in the detail specification.
The test conditions and performance requirements for the qualification approval on the basis
of the fixed sample size procedure should be identical to those for quality conformance
inspection given in the detail specification.

Table 2 – Fixed sample size test Sampling plan for qualification approval,
assessment level EZ
Permissible
Group Numbe
...