IEC 60384-24:2021
(Main)Fixed capacitors for use in electronic equipment - Part 24: Sectional specification - Fixed tantalum electrolytic surface mount capacitors with conductive polymer solid electrolyte
Fixed capacitors for use in electronic equipment - Part 24: Sectional specification - Fixed tantalum electrolytic surface mount capacitors with conductive polymer solid electrolyte
IEC 60384-24:2021 applies to fixed tantalum electrolytic surface mount capacitors with conductive polymer solid electrolyte, which are primarily intended for DC applications for use in electronic equipment. The object of this document is to prescribe preferred ratings and characteristics and to select from IEC 60384-1:2016 the appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements for this type of capacitor. This edition includes the following significant technical changes with respect to the previous edition: - Revision of the structure in accordance with ISO/IEC Directives, Part 2:2018, to the extent practicable, and harmonization between other similar kinds of documents.
- In addition, Clause 5 and all the tables have been reviewed in order to prevent duplications and contradictions.
Condensateurs fixes utilisés dans les équipements électroniques - Partie 24: Spécification intermédiaire - Condensateurs fixes électrolytiques au tantale pour montage en surface à électrolyte solide en polymère conducteur
L’IEC 60384-24:2021 s’applique aux condensateurs fixes électrolytiques au tantale pour montage en surface à électrolyte solide en polymère conducteur principalement destinés à des applications en courant continu pour être utilisés dans des équipements électroniques. Le présent document a pour objet de spécifier les valeurs assignées et caractéristiques préférentielles, de sélectionner, en se référant à l’IEC 60384-1:2016, les procédures d’assurance de la qualité, les essais et les méthodes de mesure appropriés et de donner les exigences de performance générales pour ce type de condensateur. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- révision de la structure fondée sur les Directives ISO/IEC, Partie 2:2018 dans la mesure du possible, et harmonisation avec d’autres types de documents similaires;
- en outre, révision de l’Article 5 et des tableaux pour éviter les redondances et les contradictions.
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IEC 60384-24 ®
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fixed capacitors for use in electronic equipment –
Part 24: Sectional specification – Fixed tantalum electrolytic surface mount
capacitors with conductive polymer solid electrolyte
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IEC 60384-24 ®
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fixed capacitors for use in electronic equipment –
Part 24: Sectional specification – Fixed tantalum electrolytic surface mount
capacitors with conductive polymer solid electrolyte
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.060.40; 31.060.50 ISBN 978-2-8322-4176-9
– 2 – IEC 60384-24:2021 RLV © IEC 2021
CONTENTS
FOREWORD. 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Preferred ratings and characteristics . 8
4.1 Preferred characteristics . 8
4.2 Preferred values of ratings . 8
4.2.1 Nominal capacitance (C ) . 8
N
4.2.2 Tolerance on nominal capacitance . 8
4.2.3 Rated voltage (U ) . 9
R
4.2.4 Category voltage (U ) . 9
C
4.2.5 Surge voltage (U or U ) . 9
RS CS
4.2.6 Rated temperature . 9
5 Test and measurement procedures . 10
5.1 General . 10
5.2 Preliminary drying . 10
5.3 Measuring conditions . 10
5.4 Mounting . 10
5.4.1 General . 10
5.4.2 Initial inspections . 10
5.4.3 Test conditions . 10
5.4.4 Final inspections and requirements . 10
5.5 Visual examination and check of dimensions . 10
5.5.1 General . 10
5.5.2 Visual examination and check of dimensions . 10
5.5.3 Requirements . 10
5.6 Electrical tests . 11
5.6.1 Leakage current . 11
5.6.2 Capacitance . 11
5.6.3 Tangent of loss angle (tan δ) . 11
5.6.4 Equivalent series resistance (ESR) (if required) . 12
5.7 Resistance to soldering heat . 12
5.7.1 General . 12
5.7.2 Initial inspections . 12
5.7.3 Test conditions . 12
5.7.4 Recovery . 12
5.7.5 Final inspections and requirements . 12
5.8 Solderability . 12
5.8.1 General . 12
5.8.2 Final inspections and requirements . 12
5.9 Shear test . 12
5.10 Substrate bending test (if required) . 13
5.10.1 General . 13
5.10.2 Initial inspections . 13
5.10.3 Test conditions . 13
5.10.4 Final inspections and requirements . 13
5.11 Rapid change of temperature . 13
5.11.1 General . 13
5.11.2 Initial inspections . 13
5.11.3 Test conditions . 13
5.11.4 Recovery . 13
5.11.5 Final inspections and requirements . 13
5.12 Climatic sequence . 13
5.12.1 General . 13
5.12.2 Initial inspections . 13
5.12.3 Dry heat . 14
5.12.4 Damp heat, cyclic, test Db, first cycle . 14
5.12.5 Cold. 14
5.12.6 Damp heat, cyclic, test Db, remaining cycles . 14
5.12.7 Recovery . 14
5.12.8 Final inspections and requirements . 14
5.13 Damp heat, steady state . 14
5.13.1 General . 14
5.13.2 Initial inspections . 14
5.13.3 Test conditions . 14
5.13.4 Recovery . 14
5.13.5 Final inspections and requirements . 14
5.14 Characteristics at high and low temperature . 15
5.14.1 General . 15
5.14.2 Initial inspections and requirements . 15
5.15 Surge voltage . 15
5.15.1 General . 15
5.15.2 Initial inspections . 15
5.15.3 Test conditions . 15
5.15.4 Recovery . 15
5.15.5 Final inspections and requirements . 16
5.16 Endurance . 16
5.16.1 General . 16
5.16.2 Initial inspections . 16
5.16.3 Test conditions . 16
5.16.4 Recovery . 16
5.16.5 Final inspections and requirements . 16
5.17 Component solvent resistance (if required) . 16
5.18 Solvent resistance of marking (if required) . 16
5.19 High surge current (if required) . 16
5.20 Storage at high temperature . 16
5.20.1 General . 16
5.20.2 Initial inspections . 16
5.20.3 Test conditions . 17
5.20.4 Recovery . 17
5.20.5 Final inspections and requirements . 17
6 Marking . 17
6.1 General . 17
6.2 Information for marking . 17
6.3 Marking on capacitors . 17
– 4 – IEC 60384-24:2021 RLV © IEC 2021
6.4 Marking on packaging . 17
7 Information to be given in a detail specification . 17
7.1 General . 17
7.2 Outline drawing and dimensions . 18
7.3 Mounting . 18
7.4 Ratings and characteristics . 18
7.4.1 General . 18
7.4.2 Nominal capacitance range . 18
7.4.3 Particular characteristics . 18
7.4.4 Soldering . 19
7.5 Marking . 19
8 Quality assessment procedures . 19
8.1 Primary stage of manufacture . 19
8.2 Structurally similar components . 19
8.3 Certified test records of released lots . 19
8.4 Qualification approval (QA) procedures . 19
8.4.1 General . 19
8.4.2 Qualification approval on the basis of the fixed sample size procedure . 19
8.4.3 Tests . 20
8.5 Quality conformance inspections . 27
8.5.1 Formation of inspection lots. 27
8.5.2 Test schedule . 28
8.5.3 Delayed delivery . 28
8.5.4 Assessment levels . 28
Annex X (informative) Cross-references to the prior edition of this document . 30
Bibliography . 31
Table 1 – Category and surge voltages . 9
Table 2 – Category and surge voltages . 9
Table 3 – Sampling plan for qualification approval, assessment level EZ . 21
Table 4 – Test schedule for qualification approval . 22
Table 5 – Lot-by-lot inspection . 28
Table 6 – Periodic inspection . 29
Table X.1 – Reference to IEC 60384-24 for clauses/subclauses and tables . 30
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –
Part 24: Sectional specification – Fixed tantalum electrolytic surface
mount capacitors with conductive polymer solid electrolyte
FOREWORD
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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 IEC 60384-24:2015. A vertical bar appears in the margin wherever a
change has been made. Additions are in green text, deletions are in strikethrough red text.
– 6 – IEC 60384-24:2021 RLV © IEC 2021
International Standard IEC 60384-24 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 2015. 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 2:2018, to the extent
practicable, and harmonization between other similar kinds of documents.
b) In addition, Clause 5 and all the tables have been reviewed in order to prevent
duplications and contradictions.
The text of this standard is based on the following documents:
FDIS Report on voting
40/2849/FDIS 40/2860/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 60384 series, published under the general title Fixed capacitors
for use in 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 http://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 publication indicates that it
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FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –
Part 24: Sectional specification – Fixed tantalum electrolytic surface
mount capacitors with conductive polymer solid electrolyte
1 General
1 Scope
This part of IEC 60384 applies to fixed tantalum electrolytic surface mount capacitors with
conductive polymer solid electrolyte, which are primarily intended for DC applications for use
in electronic equipment.
Fixed tantalum electrolytic surface mount capacitors with solid (MnO ) electrolyte are not
included but are covered by IEC 60384-3.
These capacitors are primarily intended for use in electronic equipment to be mounted directly
on substrates for hybrid circuits or to printed boards.
Capacitors for special-purpose applications may can need additional requirements.
1.2 Object
The object of this document is to prescribe preferred ratings and characteristics and to select
from IEC 60384-1:2016 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.
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 60063, Preferred number series for resistors and capacitors
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60384-1:20082016, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
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
– 8 – IEC 60384-24:2021 RLV © IEC 2021
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60384-1:20082016
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
3.1
capacitance
capacitance of an equivalent circuit whose capacitance and
resistance in series is measured with an alternating current having an approximately
sinusoidal waveform at a specified frequency
4 Preferred ratings and characteristics
4.1 Preferred characteristics
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 temperature shall be taken from the following:
• lower category temperature: −55 °C;
• upper category temperature: +105 °C and +125 °C.
The severities for the cold and dry heat tests are the lower and upper category temperatures
respectively.
The upper category temperature shall be 105 °C or 125 °C for a rated temperature of 85 °C.
The upper category temperature shall be 125 °C for a rated temperature of 105 °C.
4.2 Preferred values of ratings
4.2.1 Nominal capacitance (C )
N
Preferred values of nominal capacitance are indicated in microfarad (µF).
Preferred values of nominal capacitance shall be taken from the E 12 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).
4.2.2 Tolerance on nominal capacitance
Preferred value of tolerance on nominal capacitance is:
±20 %.
4.2.3 Rated voltage (U )
R
Preferred values of rated direct DC voltages taken from R10 and R20 series of ISO 3 are:
– from R10: 1,0 – 1,25 – 1,6 – 2,0 – 2,5 – 4,0 – 5,0 – 6,3 – 8,0;
– from R20: 3,5 ;
n
– and their decimal multiples (× 10 , n: integer).
4.2.4 Category voltage (U )
C
The category voltage for capacitors is given in Table 1 and Table 2.
4.2.5 Surge voltage (U or U )
RS CS
The surge voltage shall be 1,15 times the rated or category voltage rounded off to the nearest
volt (two significant digits) (see Table 1 and Table 2).
NOTE U is the surge voltage to rated voltage;
RS
U is the surge voltage to category voltage.
CS
4.2.6 Rated temperature
The value of the rated temperature is +85 °C and +105 °C (see Table 1 and Table 2).
Table 1 – Category and surge voltages
Values in volts
Upper category temperature 125 °C / rated temperature 85 °C
U 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35
R
U = 0,80 U
1,6 2,0 3,2 4,0 5,0 6,4 8,0 10 13 16 20 28
C R
U 2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40
RS
U 1,8 2,3 3,7 4,6 5,8 7,4 9,2 12 15 18 23 32
CS
Table 2 – Category and surge voltages
Values in volts
Upper category temperature 125 °C / rated temperature 105 °C
or upper category temperature 105 °C / rated temperature 85 °C
U 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35
R
U = 0,90 U 1,8 2,3 3,6 4,5 5,7 7,2 9,0 11 14 18 23 32
C R
U 2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40
RS
U 2,0 2,6 4,1 5,2 6,5 8,2 10 13 16 20 26 36
CS
_____________
ISO 3 indicates the value 3,55 for R20.
– 10 – IEC 60384-24:2021 RLV © IEC 2021
5 Test and measurement procedures
5.1 General
Test severities and requirements prescribed in detail specifications referring to this sectional
specification are of equal or higher performance level, because lower performance levels are
not permitted.
This clause supplements the information given in IEC 60384-1:20082016, Clause 4.
5.2 Preliminary drying
See IEC 60384-1:20082016, 4.3.
5.3 Measuring conditions
See IEC 60384-1:20082016, 4.2.1.
5.4 Mounting
5.4.1 General
See IEC 60384-1:20082016, 4.33, with 5.4.2, 5.4.3 and 5.4.4 of this document.
5.4.2 Initial inspections
See Table 4.
5.4.3 Test conditions
The test method shall be the reflow method and reflow temperature profile specified in the
detail specification.
5.4.4 Final inspections and requirements
See Table 4.
5.5 Visual examination and check of dimensions
5.5.1 General
See IEC 60384-1:20082016, 4.4, with 5.5.2 and 5.5.3 of this document.
5.5.2 Visual examination and check of dimensions
Visual examination shall be carried out with suitable equipment with approximately 10×
magnification and lighting appropriate to the specimen under test and the quality level
required. The operator should have available facilities for incident or transmitted illumination,
as well as an appropriate measuring facility. The capacitors shall be examined to verify that
the materials, design, construction, and physical dimensions are appropriate.
5.5.3 Requirements
The workmanship shall be in accordance with the applicable requirements given in the detail
specification.
5.6 Electrical tests
5.6.1 Leakage current
5.6.1.1 General
See IEC 60384-1:20082016, 4.9, with 5.6.1.2 and 5.6.1.3 of this document.
5.6.1.2 Measuring conditions
The rated voltage shall be applied across the capacitor and its protective resistor placed in
series with the capacitor to limit the charging current.
The protective resistor shall have a value of 1 000 Ω.
5.6.1.3 Requirements
See Table 4.
5.6.2 Capacitance
5.6.2.1 General
See IEC 60384-1:20082016, 4.7, with 5.6.2.2 and 5.6.2.3 of this document.
5.6.2.2 Measuring conditions
Unless otherwise specified in the detail specifications, the capacitance shall be measured at a
frequency of 100 Hz or 120 Hz.
The peak alternating voltage actually applied across the capacitor terminations shall not
exceed 0,5 V (RMS).
A DC bias voltage of 0,7 V to 1,0 V may be applied during the measurement to avoid negative
voltage application to the capacitor by the applied AC voltage.
The inaccuracy of the measuring instruments shall not exceed ±2 % of the limit specified in
the detail specification, whether this is given as an absolute value or as a change of
capacitance.
5.6.2.3 Requirements
See Table 4.
5.6.3 Tangent of loss angle (tan δ)
5.6.3.1 General
See IEC 60384-1:20082016, 4.8.1, with 5.6.3.2 and 5.6.3.3 of this document.
5.6.3.2 Measuring conditions
The measurement shall be under the conditions as specified in 5.6.2.2.
The inaccuracy of the measuring equipment shall not exceed 0,01 in absolute value.
5.6.3.3 Requirements
See Table 4.
– 12 – IEC 60384-24:2021 RLV © IEC 2021
5.6.4 Equivalent series resistance (ESR) (if required)
5.6.4.1 General
See IEC 60384-1:20082016, 4.8.2, with 5.6.4.2 and 5.6.4.3 of this document.
5.6.4.2 Measuring conditions
Unless otherwise specified in the detail specifications, test conditions are as follows:
– temperature: 20 °C ± 2 °C;
– applied voltage: peak AC value ≤ 0,5 V (RMS);
– voltage frequency: 100 kHz ± 10 kHz.
The error of measurement shall not exceed 5 % of the requirement, or 0,02 Ω, whichever is
the greater.
5.6.4.3 Requirements
See Table 4.
5.7 Resistance to soldering heat
5.7.1 General
See IEC 60384-1:20082016, 4.14, with 5.7.2 to 5.7.5 of this document.
5.7.2 Initial inspections
See Table 4.
5.7.3 Test conditions
The test method shall be the reflow method, and the reflow temperature profile shall be
specified in the detail specification.
5.7.4 Recovery
The recovery period shall be 24 h ± 2 h.
5.7.5 Final inspections and requirements
After recovery, the capacitors shall be visually examined under normal lighting and
approximately 10× magnification and measured electrical characteristics given in Table 4.
5.8 Solderability
5.8.1 General
See IEC 60384-1:20082016, 4.15, with 5.8.2 of this document.
5.8.2 Final inspections and requirements
See Table 4.
5.9 Shear test
See IEC 60384-1:20082016, 4.34.
5.10 Substrate bending test (if required)
5.10.1 General
See IEC 60384-1:20082016, 4.35, with 5.10.2 to 5.10.4 of this document.
5.10.2 Initial inspections
See Table 4.
5.10.3 Test conditions
Deflection D and the number of bends shall be specified in the detail specification.
5.10.4 Final inspections and requirements
See Table 4.
5.11 Rapid change of temperature
5.11.1 General
See IEC 60384-1:20082016, 4.16, with 5.11.2 to 5.11.5 of this document.
The capacitors shall be mounted in accordance with 5.4.
5.11.2 Initial inspections
See Table 4.
5.11.3 Test conditions
Test conditions are as follows:
– T = lower category temperature;
A
– T = upper category temperature;
B
– the capacitors shall be tested for 5 cycles;
– the duration of the exposure at each temperature limit shall be 30 min.
5.11.4 Recovery
The recovery period shall be 1 h to 2 h.
5.11.5 Final inspections and requirements
See Table 4.
5.12 Climatic sequence
5.12.1 General
See IEC 60384-1:20082016, 4.21, with 5.12.2 to 5.12.8 of this document.
5.12.2 Initial inspections
See Table 4.
– 14 – IEC 60384-24:2021 RLV © IEC 2021
5.12.3 Dry heat
See IEC 60384-1:20082016, 4.21.3, with the following details:
– temperature: upper category temperature;
– duration: 16 h.
5.12.4 Damp heat, cyclic, test Db, first cycle
See IEC 60384-1:20082016, 4.21.4.
5.12.5 Cold
See IEC 60384-1:20082016, 4.21.5, with the following details:
– temperature: lower category temperature;
– duration: 2 h.
5.12.6 Damp heat, cyclic, test Db, remaining cycles
See IEC 60384-1:20082016, 4.21.7.
5.12.7 Recovery
The recovery period shall be 1 h to 2 h.
5.12.8 Final inspections and requirements
See Table 4.
5.13 Damp heat, steady state
5.13.1 General
See IEC 60384-1:20082016, 4.22, with 5.13.2 to 5.13.5 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.13.2 Initial inspections
See Table 4.
5.13.3 Test conditions
Test conditions are as follows:
– temperature: 40 °C ± 2 °C;
– relative humidity: (93 ± 3) %;
– applied voltage: no voltage shall be applied;
– duration: 21 days.
5.13.4 Recovery
The recovery period shall be 1 h to 2 h.
5.13.5 Final inspections and requirements
See Table 4.
5.14 Characteristics at high and low temperature
5.14.1 General
See IEC 60384-1:20082016, 4.29, with 5.14.2 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.14.2 Initial inspections and requirements
The capacitors shall be measured at each temperature step and shall meet the requirements
given in Table 4.
5.15 Surge voltage
5.15.1 General
See IEC 60384-1:20082016, 4.26, with 5.15.2 to 5.15.5 of this document.
5.15.2 Initial inspections
See Table 4.
5.15.3 Test conditions
Test conditions are as follows:
– number of cycles: 1 000;
– temperature: 15 °C to upper category temperature with the applicable
requirements given in the detail specification;
– voltage: 1,15 U or 1,15 U ;
R C
– Protective charge resistor: 1 000 Ω ± 100 Ω or a value calculated by Formula (1);
RC = 0,1 ± 0,05 (s) (1)
where
If the internal resistance of the power supply is negligibly smaller than 1 000 Ω, R is equal to
the resistance of the charging circuit. If the internal resistance of the power supply affects the
charging resistance of the circuit, the current value possibly gets too small to measure
correctly. On the other hand, if the time constant is 0,1 s and the capacitance is 1 000 µF, the
R value is 100 Ω. Since an excessive inrush current then flows depending on the applied
voltage, it is not possible to distinguish whether a defect, even if it occurs, is caused by the
inrush current or the surge. Therefore, either of the two conditions above should be selectable
depending on the situation at measurement.
R is the value of charge resistor sum of the internal resistance of the power supply and
resistance of the charge circuit (Ω)
C is the value of nominal capacitance (F)
– duration of charge: 30 s;
– duration of no-load: 5 min 30 s.
5.15.4 Recovery
The recovery period shall be 1 h to 2 h.
– 16 – IEC 60384-24:2021 RLV © IEC 2021
5.15.5 Final inspections and requirements
See Table 4.
5.16 Endurance
5.16.1 General
See IEC 60384-1:20082016, 4.23, with 5.16.2 to 5.16.5 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.16.2 Initial inspections
See Table 4.
5.16.3 Test conditions
Test conditions are as follows:
– applied voltage: category voltage, unless otherwise specified in the detail specification;
– temperature: upper category temperature;
– duration: 1 000 h.
NOTE When the category voltage is different from the rated voltage, the sample tested is divided into two parts
and submitted to the rated temperature and the category voltage respectively.
5.16.4 Recovery
The recovery period shall be 1 h to 2 h.
5.16.5 Final inspections and requirements
See Table 4.
5.17 Component solvent resistance (if required)
See IEC 60384-1:20082016, 4.31.
5.18 Solvent resistance of marking (if required)
See IEC 60384-1:20082016, 4.32.
5.19 High surge current (if required)
See IEC 60384-1:20082016, 4.39.
5.20 Storage at high temperature
5.20.1 General
See IEC 60384-1:20082016, 4.25.1, with 5.20.2 to 5.20.5 of this document.
5.20.2 Initial inspections
See Table 4.
5.20.3 Test conditions
Test conditions are as follows:
– temperature: upper category temperature;
– duration: 96 h ± 4 h.
5.20.4 Recovery
The minimum recovery period shall be 16 h.
5.20.5 Final inspections and requirements
See Table 4.
6 Marking
6.1 General
See IEC 60384-1:20082016, 2.4, with 6.2 to 6.4 of this document.
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 (unless identified by the construction);
b) nominal capacitance;
c) rated voltage (DC voltage may be indicated by the symbol: (IEC 60417-5031-2002-
10) or );
d) category temperature;
e) tolerance on nominal capacitance;
f) year and month (or, year and week) of manufacture;
g) manufacturer’s name and/or trademark;
h) manufacturer’s type designation;
i) reference to the detail specification.
6.3 Marking on capacitors
Polarity of the terminations shall be marked. Other elements are marked, as necessary.
Any marking shall be legible and not easily smeared or removed by rubbing with fingers.
6.4 Marking on packaging
The packaging containing the capacitors should be clearly marked with the information listed
in 6.2 as necessary.
7 Information to be given in a detail specification
7.1 General
Detail specifications shall be derived from the blank detail specification.
– 18 – IEC 60384-24:2021 RLV © IEC 2021
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.
The information given in 7.27.2 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.
7.2 Outline drawing 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.
The numerical values of the body shall be given as follows:
– for general: width, length and height.
The numerical values of the terminals shall be given as follows:
– for terminals: width, 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.
7.3 Mounting
The method of mounting for tests and measurements are given in 5.4. The detail specification
shall specify the methods of mounting for normal use.
7.4 Ratings and characteristics
7.4.1 General
The ratings and characteristics shall be given in accordance with the relevant subclauses of
this sectional specification, including the items specified in 7.4.2 to 7.4.4.
7.4.2 Nominal capacitance range
See 4.2.1.
When products approved to the detail specification have different nominal capacitance ranges,
the following statement should be added:
“The nominal capacitance range available in each voltage range is given in the register of
approvals, available for example on the IECQ on-line certificate system website
www.iecq.org”.
7.4.3 Particular characteristics
Additional characteristics may be listed when they are considered necessary to specify
adequately the component for design and
...
IEC 60384-24 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –
Part 24: Sectional specification – Fixed tantalum electrolytic surface mount
capacitors with conductive polymer solid electrolyte
Condensateurs fixes utilisés dans les équipements électroniques –
Partie 24: Spécification intermédiaire – Condensateurs fixes électrolytiques
au tantale pour montage en surface à électrolyte solide en polymère conducteur
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IEC 60384-24 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –
Part 24: Sectional specification – Fixed tantalum electrolytic surface mount
capacitors with conductive polymer solid electrolyte
Condensateurs fixes utilisés dans les équipements électroniques –
Partie 24: Spécification intermédiaire – Condensateurs fixes électrolytiques
au tantale pour montage en surface à électrolyte solide en polymère conducteur
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.060.40; 31.060.50 ISBN 978-2-8322-9978-4
– 2 – IEC 60384-24:2021 © IEC 2021
CONTENTS
FOREWORD. 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Preferred ratings and characteristics . 8
4.1 Preferred characteristics . 8
4.2 Preferred values of ratings . 8
4.2.1 Nominal capacitance (C ) . 8
N
4.2.2 Tolerance on nominal capacitance . 8
4.2.3 Rated voltage (U ) . 8
R
4.2.4 Category voltage (U ) . 9
C
4.2.5 Surge voltage (U or U ) . 9
RS CS
4.2.6 Rated temperature . 9
5 Test and measurement procedures . 9
5.1 General . 9
5.2 Preliminary drying . 9
5.3 Measuring conditions . 9
5.4 Mounting . 10
5.4.1 General . 10
5.4.2 Initial inspections . 10
5.4.3 Test conditions . 10
5.4.4 Final inspections and requirements . 10
5.5 Visual examination and check of dimensions . 10
5.5.1 General . 10
5.5.2 Visual examination and check of dimensions . 10
5.5.3 Requirements . 10
5.6 Electrical tests . 10
5.6.1 Leakage current . 10
5.6.2 Capacitance . 11
5.6.3 Tangent of loss angle (tan δ) . 11
5.6.4 Equivalent series resistance (ESR) (if required) . 11
5.7 Resistance to soldering heat . 12
5.7.1 General . 12
5.7.2 Initial inspections . 12
5.7.3 Test conditions . 12
5.7.4 Recovery . 12
5.7.5 Final inspections and requirements . 12
5.8 Solderability . 12
5.8.1 General . 12
5.8.2 Final inspections and requirements . 12
5.9 Shear test . 12
5.10 Substrate bending test (if required) . 12
5.10.1 General . 12
5.10.2 Initial inspections . 12
5.10.3 Test conditions . 12
5.10.4 Final inspections and requirements . 12
5.11 Rapid change of temperature . 13
5.11.1 General . 13
5.11.2 Initial inspections . 13
5.11.3 Test conditions . 13
5.11.4 Recovery . 13
5.11.5 Final inspections and requirements . 13
5.12 Climatic sequence . 13
5.12.1 General . 13
5.12.2 Initial inspections . 13
5.12.3 Dry heat . 13
5.12.4 Damp heat, cyclic, test Db, first cycle . 13
5.12.5 Cold. 13
5.12.6 Damp heat, cyclic, test Db, remaining cycles . 14
5.12.7 Recovery . 14
5.12.8 Final inspections and requirements . 14
5.13 Damp heat, steady state . 14
5.13.1 General . 14
5.13.2 Initial inspections . 14
5.13.3 Test conditions . 14
5.13.4 Recovery . 14
5.13.5 Final inspections and requirements . 14
5.14 Characteristics at high and low temperature . 14
5.14.1 General . 14
5.14.2 Initial inspections and requirements . 14
5.15 Surge voltage . 14
5.15.1 General . 14
5.15.2 Initial inspections . 15
5.15.3 Test conditions . 15
5.15.4 Recovery . 15
5.15.5 Final inspections and requirements . 15
5.16 Endurance . 15
5.16.1 General . 15
5.16.2 Initial inspections . 15
5.16.3 Test conditions . 16
5.16.4 Recovery . 16
5.16.5 Final inspections and requirements . 16
5.17 Component solvent resistance (if required) . 16
5.18 Solvent resistance of marking (if required) . 16
5.19 High surge current (if required) . 16
5.20 Storage at high temperature . 16
5.20.1 General . 16
5.20.2 Initial inspections . 16
5.20.3 Test conditions . 16
5.20.4 Recovery . 16
5.20.5 Final inspections and requirements . 16
6 Marking . 17
6.1 General . 17
6.2 Information for marking . 17
6.3 Marking on capacitors . 17
– 4 – IEC 60384-24:2021 © IEC 2021
6.4 Marking on packaging . 17
7 Information to be given in a detail specification . 17
7.1 General . 17
7.2 Outline drawing and dimensions . 17
7.3 Mounting . 18
7.4 Ratings and characteristics . 18
7.4.1 General . 18
7.4.2 Nominal capacitance range . 18
7.4.3 Particular characteristics . 18
7.4.4 Soldering . 18
7.5 Marking . 18
8 Quality assessment procedures . 19
8.1 Primary stage of manufacture . 19
8.2 Structurally similar components . 19
8.3 Certified test records of released lots . 19
8.4 Qualification approval (QA) procedures . 19
8.4.1 General . 19
8.4.2 Qualification approval on the basis of the fixed sample size procedure . 19
8.4.3 Tests . 20
8.5 Quality conformance inspections . 27
8.5.1 Formation of inspection lots. 27
8.5.2 Test schedule . 28
8.5.3 Delayed delivery . 28
8.5.4 Assessment levels . 28
Annex X (informative) Cross-references to the prior edition of this document . 30
Bibliography . 31
Table 1 – Category and surge voltages . 9
Table 2 – Category and surge voltages . 9
Table 3 – Sampling plan for qualification approval, assessment level EZ . 21
Table 4 – Test schedule for qualification approval . 22
Table 5 – Lot-by-lot inspection . 28
Table 6 – Periodic inspection . 29
Table X.1 – Reference to IEC 60384-24 for clauses/subclauses and tables . 30
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –
Part 24: Sectional specification – Fixed tantalum electrolytic surface
mount 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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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 60384-24 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 2015. 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 2:2018, to the extent
practicable, and harmonization between other similar kinds of documents.
b) In addition, Clause 5 and all the tables have been reviewed in order to prevent
duplications and contradictions.
– 6 – IEC 60384-24:2021 © IEC 2021
The text of this standard is based on the following documents:
FDIS Report on voting
40/2849/FDIS 40/2860/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 60384 series, published under the general title Fixed capacitors
for use in 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 http://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.
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –
Part 24: Sectional specification – Fixed tantalum electrolytic surface
mount capacitors with conductive polymer solid electrolyte
1 Scope
This part of IEC 60384 applies to fixed tantalum electrolytic surface mount capacitors with
conductive polymer solid electrolyte, which are primarily intended for DC applications for use
in electronic equipment.
Fixed tantalum electrolytic surface mount capacitors with solid (MnO ) electrolyte are not
included but are covered by IEC 60384-3.
These capacitors are primarily intended for use in electronic equipment to be mounted directly
on substrates for hybrid circuits or to printed boards.
Capacitors for special-purpose applications can need additional requirements.
The object of this document is to prescribe preferred ratings and characteristics and to select
from IEC 60384-1:2016 the appropriate quality assessment procedures, tests and measuring
methods and to give general performance requirements for this type of capacitor.
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 60063, Preferred number series for resistors and capacitors
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60384-1:2016, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
IEC 61193-2:2007, 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 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
– 8 – IEC 60384-24:2021 © IEC 2021
3.1
capacitance
capacitance of an equivalent circuit whose capacitance and
resistance in series is measured with an alternating current having an approximately
sinusoidal waveform at a specified frequency
4 Preferred ratings and characteristics
4.1 Preferred characteristics
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 temperature shall be taken from the following:
• lower category temperature: −55 °C;
• upper category temperature: +105 °C and +125 °C.
The severities for the cold and dry heat tests are the lower and upper category temperatures
respectively.
The upper category temperature shall be 105 °C or 125 °C for a rated temperature of 85 °C.
The upper category temperature shall be 125 °C for a rated temperature of 105 °C.
4.2 Preferred values of ratings
4.2.1 Nominal capacitance (C )
N
Preferred values of nominal capacitance are indicated in microfarad (µF).
Preferred values of nominal capacitance shall be taken from the E 12 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).
4.2.2 Tolerance on nominal capacitance
Preferred value of tolerance on nominal capacitance is:
±20 %.
4.2.3 Rated voltage (U )
R
Preferred values of rated DC voltages taken from R10 and R20 series of ISO 3 are:
– from R10: 1,0 – 1,25 – 1,6 – 2,0 – 2,5 – 4,0 – 5,0 – 6,3 – 8,0;
– from R20: 3,5 ;
n
– and their decimal multiples (× 10 , n: integer).
_____________
ISO 3 indicates the value 3,55 for R20.
4.2.4 Category voltage (U )
C
The category voltage for capacitors is given in Table 1 and Table 2.
4.2.5 Surge voltage (U or U )
RS CS
The surge voltage shall be 1,15 times the rated or category voltage rounded off to the nearest
volt (two significant digits) (see Table 1 and Table 2).
NOTE U is the surge voltage to rated voltage;
RS
U is the surge voltage to category voltage.
CS
4.2.6 Rated temperature
The value of the rated temperature is +85 °C and +105 °C (see Table 1 and Table 2).
Table 1 – Category and surge voltages
Values in volts
Upper category temperature 125 °C / rated temperature 85 °C
U 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35
R
U = 0,80 U 1,6 2,0 3,2 4,0 5,0 6,4 8,0 10 13 16 20 28
C R
U
2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40
RS
U 1,8 2,3 3,7 4,6 5,8 7,4 9,2 12 15 18 23 32
CS
Table 2 – Category and surge voltages
Values in volts
Upper category temperature 125 °C / rated temperature 105 °C
or upper category temperature 105 °C / rated temperature 85 °C
U 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35
R
U = 0,90 U 1,8 2,3 3,6 4,5 5,7 7,2 9,0 11 14 18 23 32
C R
U 2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40
RS
U 2,0 2,6 4,1 5,2 6,5 8,2 10 13 16 20 26 36
CS
5 Test and measurement procedures
5.1 General
Test severities and requirements prescribed in detail specifications referring to this sectional
specification are of equal or higher performance level, because lower performance levels are
not permitted.
This clause supplements the information given in IEC 60384-1:2016, Clause 4.
5.2 Preliminary drying
See IEC 60384-1:2016, 4.3.
5.3 Measuring conditions
See IEC 60384-1:2016, 4.2.1.
– 10 – IEC 60384-24:2021 © IEC 2021
5.4 Mounting
5.4.1 General
See IEC 60384-1:2016, 4.33, with 5.4.2, 5.4.3 and 5.4.4 of this document.
5.4.2 Initial inspections
See Table 4.
5.4.3 Test conditions
The test method shall be the reflow method and reflow temperature profile specified in the
detail specification.
5.4.4 Final inspections and requirements
See Table 4.
5.5 Visual examination and check of dimensions
5.5.1 General
See IEC 60384-1:2016, 4.4, with 5.5.2 and 5.5.3 of this document.
5.5.2 Visual examination and check of dimensions
Visual examination shall be carried out with suitable equipment with approximately 10×
magnification and lighting appropriate to the specimen under test and the quality level
required. The operator should have available facilities for incident or transmitted illumination,
as well as an appropriate measuring facility. The capacitors shall be examined to verify that
the materials, design, construction, and physical dimensions are appropriate.
5.5.3 Requirements
The workmanship shall be in accordance with the applicable requirements given in the detail
specification.
5.6 Electrical tests
5.6.1 Leakage current
5.6.1.1 General
See IEC 60384-1:2016, 4.9, with 5.6.1.2 and 5.6.1.3 of this document.
5.6.1.2 Measuring conditions
The rated voltage shall be applied across the capacitor and its protective resistor placed in
series with the capacitor to limit the charging current.
The protective resistor shall have a value of 1 000 Ω.
5.6.1.3 Requirements
See Table 4.
5.6.2 Capacitance
5.6.2.1 General
See IEC 60384-1:2016, 4.7, with 5.6.2.2 and 5.6.2.3 of this document.
5.6.2.2 Measuring conditions
Unless otherwise specified in the detail specifications, the capacitance shall be measured at a
frequency of 100 Hz or 120 Hz.
The peak alternating voltage actually applied across the capacitor terminations shall not
exceed 0,5 V (RMS).
A DC bias voltage of 0,7 V to 1,0 V may be applied during the measurement to avoid negative
voltage application to the capacitor by the applied AC voltage.
The inaccuracy of the measuring instruments shall not exceed ±2 % of the limit specified in
the detail specification, whether this is given as an absolute value or as a change of
capacitance.
5.6.2.3 Requirements
See Table 4.
5.6.3 Tangent of loss angle (tan δ)
5.6.3.1 General
See IEC 60384-1:2016, 4.8.1, with 5.6.3.2 and 5.6.3.3 of this document.
5.6.3.2 Measuring conditions
The measurement shall be under the conditions as specified in 5.6.2.2.
The inaccuracy of the measuring equipment shall not exceed 0,01 in absolute value.
5.6.3.3 Requirements
See Table 4.
5.6.4 Equivalent series resistance (ESR) (if required)
5.6.4.1 General
See IEC 60384-1:2016, 4.8.2, with 5.6.4.2 and 5.6.4.3 of this document.
5.6.4.2 Measuring conditions
Unless otherwise specified in the detail specifications, test conditions are as follows:
– temperature: 20 °C ± 2 °C;
– applied voltage: peak AC value ≤ 0,5 V (RMS);
– voltage frequency: 100 kHz ± 10 kHz.
The error of measurement shall not exceed 5 % of the requirement, or 0,02 Ω, whichever is
the greater.
– 12 – IEC 60384-24:2021 © IEC 2021
5.6.4.3 Requirements
See Table 4.
5.7 Resistance to soldering heat
5.7.1 General
See IEC 60384-1:2016, 4.14, with 5.7.2 to 5.7.5 of this document.
5.7.2 Initial inspections
See Table 4.
5.7.3 Test conditions
The test method shall be the reflow method, and the reflow temperature profile shall be
specified in the detail specification.
5.7.4 Recovery
The recovery period shall be 24 h ± 2 h.
5.7.5 Final inspections and requirements
After recovery, the capacitors shall be visually examined under normal lighting and
approximately 10× magnification and measured electrical characteristics given in Table 4.
5.8 Solderability
5.8.1 General
See IEC 60384-1:2016, 4.15, with 5.8.2 of this document.
5.8.2 Final inspections and requirements
See Table 4.
5.9 Shear test
See IEC 60384-1:2016, 4.34.
5.10 Substrate bending test (if required)
5.10.1 General
See IEC 60384-1:2016, 4.35, with 5.10.2 to 5.10.4 of this document.
5.10.2 Initial inspections
See Table 4.
5.10.3 Test conditions
Deflection D and the number of bends shall be specified in the detail specification.
5.10.4 Final inspections and requirements
See Table 4.
5.11 Rapid change of temperature
5.11.1 General
See IEC 60384-1:2016, 4.16, with 5.11.2 to 5.11.5 of this document.
The capacitors shall be mounted in accordance with 5.4.
5.11.2 Initial inspections
See Table 4.
5.11.3 Test conditions
Test conditions are as follows:
– T = lower category temperature;
A
– T = upper category temperature;
B
– the capacitors shall be tested for 5 cycles;
– the duration of the exposure at each temperature limit shall be 30 min.
5.11.4 Recovery
The recovery period shall be 1 h to 2 h.
5.11.5 Final inspections and requirements
See Table 4.
5.12 Climatic sequence
5.12.1 General
See IEC 60384-1:2016, 4.21, with 5.12.2 to 5.12.8 of this document.
5.12.2 Initial inspections
See Table 4.
5.12.3 Dry heat
See IEC 60384-1:2016, 4.21.3, with the following details:
– temperature: upper category temperature;
– duration: 16 h.
5.12.4 Damp heat, cyclic, test Db, first cycle
See IEC 60384-1:2016, 4.21.4.
5.12.5 Cold
See IEC 60384-1:2016, 4.21.5, with the following details:
– temperature: lower category temperature;
– duration: 2 h.
– 14 – IEC 60384-24:2021 © IEC 2021
5.12.6 Damp heat, cyclic, test Db, remaining cycles
See IEC 60384-1:2016, 4.21.7.
5.12.7 Recovery
The recovery period shall be 1 h to 2 h.
5.12.8 Final inspections and requirements
See Table 4.
5.13 Damp heat, steady state
5.13.1 General
See IEC 60384-1:2016, 4.22, with 5.13.2 to 5.13.5 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.13.2 Initial inspections
See Table 4.
5.13.3 Test conditions
Test conditions are as follows:
– temperature: 40 °C ± 2 °C;
– relative humidity: (93 ± 3) %;
– applied voltage: no voltage shall be applied;
– duration: 21 days.
5.13.4 Recovery
The recovery period shall be 1 h to 2 h.
5.13.5 Final inspections and requirements
See Table 4.
5.14 Characteristics at high and low temperature
5.14.1 General
See IEC 60384-1:2016, 4.29, with 5.14.2 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.14.2 Initial inspections and requirements
The capacitors shall be measured at each temperature step and shall meet the requirements
given in Table 4.
5.15 Surge voltage
5.15.1 General
See IEC 60384-1:2016, 4.26, with 5.15.2 to 5.15.5 of this document.
5.15.2 Initial inspections
See Table 4.
5.15.3 Test conditions
Test conditions are as follows:
– number of cycles: 1 000;
– temperature: 15 °C to upper category temperature with the applicable
requirements given in the detail specification;
– voltage: 1,15 U or 1,15 U ;
R C
– charge resistor: 1 000 Ω ± 100 Ω or a value calculated by Formula (1);
RC = 0,1 ± 0,05 (s) (1)
where
If the internal resistance of the power supply is negligibly smaller than 1 000 Ω, R is equal to
the resistance of the charging circuit. If the internal resistance of the power supply affects the
charging resistance of the circuit, the current value possibly gets too small to measure
correctly. On the other hand, if the time constant is 0,1 s and the capacitance is 1 000 µF, the
R value is 100 Ω. Since an excessive inrush current then flows depending on the applied
voltage, it is not possible to distinguish whether a defect, even if it occurs, is caused by the
inrush current or the surge. Therefore, either of the two conditions above should be selectable
depending on the situation at measurement.
R is the sum of the internal resistance of the power supply and resistance of the charge
circuit (Ω)
C is the value of nominal capacitance (F)
– duration of charge: 30 s;
– duration of no-load: 5 min 30 s.
5.15.4 Recovery
The recovery period shall be 1 h to 2 h.
5.15.5 Final inspections and requirements
See Table 4.
5.16 Endurance
5.16.1 General
See IEC 60384-1:2016, 4.23, with 5.16.2 to 5.16.5 of this document:
The capacitors shall be mounted in accordance with 5.4.
5.16.2 Initial inspections
See Table 4.
– 16 – IEC 60384-24:2021 © IEC 2021
5.16.3 Test conditions
Test conditions are as follows:
– applied voltage: category voltage, unless otherwise specified in the detail specification;
– temperature: upper category temperature;
– duration: 1 000 h.
NOTE When the category voltage is different from the rated voltage, the sample tested is divided into two parts
and submitted to the rated temperature and the category voltage respectively.
5.16.4 Recovery
The recovery period shall be 1 h to 2 h.
5.16.5 Final inspections and requirements
See Table 4.
5.17 Component solvent resistance (if required)
See IEC 60384-1:2016, 4.31.
5.18 Solvent resistance of marking (if required)
See IEC 60384-1:2016, 4.32.
5.19 High surge current (if required)
See IEC 60384-1:2016, 4.39.
5.20 Storage at high temperature
5.20.1 General
See IEC 60384-1:2016, 4.25.1, with 5.20.2 to 5.20.5 of this document.
5.20.2 Initial inspections
See Table 4.
5.20.3 Test conditions
Test conditions are as follows:
– temperature: upper category temperature;
– duration: 96 h ± 4 h.
5.20.4 Recovery
The minimum recovery period shall be 16 h.
5.20.5 Final inspections and requirements
See Table 4.
6 Marking
6.1 General
See IEC 60384-1:2016, 2.4, with 6.2 to 6.4 of this document.
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 (unless identified by the construction);
b) nominal capacitance;
c) rated voltage (DC voltage may be indicated by the symbol: (IEC 60417-5031-2002-
10) or );
d) category temperature;
e) tolerance on nominal capacitance;
f) year and month (or, year and week) of manufacture;
g) manufacturer’s name and/or trademark;
h) manufacturer’s type designation;
i) reference to the detail specification.
6.3 Marking on capacitors
Polarity of the terminations shall be marked. Other elements are marked, as necessary.
Any marking shall be legible and not easily smeared or removed by rubbing with fingers.
6.4 Marking on packaging
The packaging containing the capacitors should be clearly marked with the information listed
in 6.2 as necessary.
7 Information to be given in a detail specification
7.1 General
Detail specifications shall be derived from the 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.
The information given in 7.27.2 may, for convenience, be presented in tabular form.
The following information shall be given in each detail s
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