EN IEC 60384-9:2024

SLOVENSKI STANDARD
01-november-2024
Pritrjeni kondenzatorji za uporabo v elektronski opremi - 9. del: Področna
specifikacija - Pritrjeni kondenzatorji s keramičnim dielektrikom, razred 2 (IEC
60384-9:2024)
Fixed capacitors for use in electronic equipment - Part 9: Sectional specification - Fixed
capacitors of ceramic dielectric, Class 2 (IEC 60384-9:2024)
Festkondensatoren zur Verwendung in Geräten der Elektronik - Teil 9:
Rahmenspezifikation - Keramik-Festkondensatoren, Klasse 2 (IEC 60384-9:2024)
Condensateurs fixes utilisés dans les équipements électroniques - Partie 9: Spécification
intermédiaire - Condensateurs fixes à diélectrique en céramique, Classe 2 (IEC 60384-
9:2024)
Ta slovenski standard je istoveten z: EN IEC 60384-9:2024
ICS:
31.060.10 Fiksni kondenzatorji Fixed capacitors
31.060.20 Keramični kondenzatorji in Ceramic and mica capacitors
sljudni kondenzatorji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60384-9

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2024
ICS 31.060.20 Supersedes EN 60384-9:2015
English Version
Fixed capacitors for use in electronic equipment - Part 9:
Sectional specification - Fixed capacitors of ceramic dielectric,
Class 2
(IEC 60384-9:2024)
Condensateurs fixes utilisés dans les équipements Festkondensatoren zur Verwendung in Geräten der
électroniques - Partie 9: Spécification intermédiaire - Elektronik - Teil 9: Rahmenspezifikation - Keramik-
Condensateurs fixes à diélectrique en céramique, Classe 2 Festkondensatoren, Klasse 2
(IEC 60384-9:2024) (IEC 60384-9:2024)
This European Standard was approved by CENELEC on 2024-09-18. 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60384-9:2024 E

European foreword
The text of document 40/3145/FDIS, future edition 5 of IEC 60384-9, prepared by TC 40 "Capacitors
and resistors for electronic equipment" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60384-9:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-06-18
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-09-18
document have to be withdrawn
This document supersedes EN 60384-9:2015 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 60384-9:2024 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 60063 NOTE Approved as EN 60063
IEC 60068-1:2013 NOTE Approved as EN 60068-1:2014 (not modified)
IEC 60384-9-1:2005 NOTE Approved as EN 60384-9-1:2005 (not modified)
IEC 60384-14 NOTE Approved as EN IEC 60384-14
IEC 60384-22 NOTE Approved as EN IEC 60384-22
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60384-1 2021 Fixed capacitors for use in electronic EN IEC 60384-1 2021
equipment - Part 1: Generic specification
IEC 61193-2 2007 Quality assessment systems - Part 2: EN 61193-2 2007
Selection and use of sampling plans for
inspection of electronic components and
packages
IEC 60384-9 ®
Edition 5.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –

Part 9: Sectional specification – Fixed capacitors of ceramic dielectric, Class 2

Condensateurs fixes utilisés dans les équipements électroniques –

Partie 9: Spécification intermédiaire – Condensateurs fixes à diélectrique en

céramique, Classe 2
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.060.20  ISBN 978-2-8322-9519-9

– 2 – IEC 60384-9:2024 © IEC 2024
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Preferred ratings and characteristics . 9
4.1 Preferred characteristics . 9
4.2 Preferred values of ratings . 9
4.2.1 Rated temperature . 9
4.2.2 Rated voltage (U ) . 10
R
4.2.3 Category voltage (U ). 10
C
4.2.4 Preferred values of nominal capacitance and associated tolerance
values . 10
4.2.5 Temperature characteristic of capacitance . 10
5 Test and measurement procedures . 11
5.1 General . 11
5.2 Special preconditioning . 11
5.3 Visual examination and check of dimensions . 11
5.4 Electrical tests . 11
5.4.1 Capacitance . 11
5.4.2 Tangent of loss angle (tan δ) . 12
5.4.3 Insulation resistance (R ). 12
i
5.4.4 Voltage proof . 13
5.5 Temperature characteristic of capacitance (reference temperature 20 °C) . 14
5.5.1 Special preconditioning . 14
5.5.2 Measuring conditions . 14
5.5.3 Requirements . 15
5.6 Robustness of terminations . 15
5.7 Resistance to soldering heat . 15
5.7.1 General . 15
5.7.2 Special preconditioning . 15
5.7.3 Initial measurement . 15
5.7.4 Recovery . 16
5.7.5 Final inspection, measurements and requirements. 16
5.8 Solderability . 16
5.8.1 General . 16
5.8.2 Test conditions . 16
5.8.3 Final inspection, measurements and requirements. 16
5.9 Rapid change of temperature (if required) . 16
5.9.1 General . 16
5.9.2 Special preconditioning . 16
5.9.3 Initial measurement . 17
5.9.4 Test conditions . 17
5.9.5 Recovery . 17
5.10 Vibration . 17
5.10.1 General . 17
5.10.2 Test conditions . 17

IEC 60384-9:2024 © IEC 2024 – 3 –
5.10.3 Final inspection, measurements and requirements. 17
5.11 Bump (repetitive shock) . 17
5.11.1 General . 17
5.11.2 Initial measurements . 17
5.11.3 Test conditions . 17
5.11.4 Final inspection, measurements and requirements. 18
5.12 Shock (non-repetitive shock) . 18
5.12.1 General . 18
5.12.2 Initial measurements . 18
5.12.3 Test conditions . 18
5.12.4 Final inspection, measurements and requirements. 18
5.13 Climatic sequence. 19
5.13.1 General . 19
5.13.2 Special preconditioning . 19
5.13.3 Initial measurements . 19
5.13.4 Dry heat . 19
5.13.5 Damp heat, cyclic, Test Db, first cycle . 19
5.13.6 Cold. 19
5.13.7 Low air pressure . 19
5.13.8 Damp heat, cyclic, Test Db, remaining cycles . 20
5.14 Damp heat, steady state . 21
5.14.1 General . 21
5.14.2 Special preconditioning . 21
5.14.3 Initial measurement . 21
5.14.4 Test conditions . 21
5.14.5 Recovery . 22
5.14.6 Final inspection, measurements and requirements. 22
5.15 Endurance . 23
5.15.1 General . 23
5.15.2 Special preconditioning . 23
5.15.3 Initial measurement . 23
5.15.4 Test conditions . 23
5.15.5 Recovery . 23
5.15.6 Final inspection, measurements and requirements. 23
5.16 Component solvent resistance (if applicable) . 24
5.17 Solvent resistance of the marking (if applicable) . 24
6 Marking . 24
6.1 General . 24
6.2 Information for marking . 24
6.3 Marking on the body . 25
6.4 Marking on the packaging . 25
6.5 Additional marking . 25
7 Information to be given in a detail specification . 25
7.1 General . 25
7.2 Outline drawing and dimensions . 25
7.3 Mounting . 26
7.4 Ratings and characteristics . 26
7.4.1 General . 26
7.4.2 Nominal capacitance range . 26

– 4 – IEC 60384-9:2024 © IEC 2024
7.4.3 Particular characteristics . 26
7.4.4 Soldering . 26
7.5 Marking . 26
8 Quality assessment procedures . 26
8.1 Primary stage of manufacture . 26
8.2 Structurally similar components . 26
8.3 Certified test records of released lots . 26
8.4 Qualification approval . 27
8.4.1 General . 27
8.4.2 Qualification approval on the basis of the fixed sample size procedure . 27
8.4.3 Tests . 27
Annex A (normative) Capacitance ageing of fixed capacitors of ceramic dielectric,
Class 2 . 33
A.1 General . 33
A.2 Law of capacitance ageing . 33
A.3 Capacitance measurements and capacitance tolerance (see 5.4.1). 34
A.4 Special preconditioning (see 5.2) . 35
Annex B (normative) Temperature characteristics of capacitance of 25 °C . 36
Annex C (normative) Quality conformance inspection . 38
C.1 Formation of inspection lots . 38
C.1.1 Groups A and B inspection . 38
C.1.2 Group C inspection . 38
C.2 Test schedule . 38
C.3 Delayed delivery . 38
C.4 Assessment levels . 38
C.5 Test schedule for quality conformance inspection . 39
Annex X (informative) Comparison of cross-references in relation to IEC 60384-9:2015 . 44
Bibliography . 45

Table 1 – Preferred tolerance on nominal capacitance . 10
Table 2 – Temperature characteristic of capacitance . 11
Table 3 – Measuring conditions . 12
Table 4 – Insulation resistance requirements . 13
Table 5 – Test voltages . 14
Table 6 – Details of measuring conditions . 15
Table 7 – Maximum capacitance change . 16
Table 8 – Preferred severities (of non-repetitive shock) . 18
Table 9 – Maximum capacitance change . 19
Table 10 – Number of damp heat cycles . 20
Table 11 – Final inspection measurements and requirements . 21
Table 12 – Test conditions for damp heat, steady state . 22
Table 13 – Final inspection, measurements and requirements . 22
Table 14 – Endurance test conditions . 23
Table 15 – Final inspection, measurements and requirements . 24
Table 16 – Sampling plan together with numbers of permissible non-conforming items

for qualification approval tests, assessment level EZ . 28

IEC 60384-9:2024 © IEC 2024 – 5 –
Table 17 – Test schedule for qualification approval . 29
Table B.1 – Temperature characteristics of capacitance . 36
Table B.2 – Preferred values of the temperature characteristic of with and without a
DC voltage applied . 37
Table B.3 – Measuring conditions of temperature characteristic of capacitance for the

reference temperature of 25 °C . 37
Table C.1 – Lot-by-lot inspection . 39
Table C.2 – Periodic tests . 39
Table C.3 – Test schedule for quality conformance inspection (lot by lot) . 40
Table C.4 – Test schedule for quality conformance inspection (periodic test) . 41
Table X.1 – Reference to IEC 60384-9:2015 for clauses/subclauses/annexes . 44
Table X.2 – Reference to IEC 60384-9 for figure/table . 44

– 6 – IEC 60384-9:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 9: Sectional specification –
Fixed capacitors of ceramic dielectric, Class 2

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,
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60384-9 has been prepared by IEC technical committee 40: Capacitors and resistors for
electronic equipment. It is an International Standard.
This fifth edition cancels and replaces the fourth 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 ISO/IEC Directives, Part 2
and to make it more useable; tables, figures and references have been revised accordingly.
Annex X contains all cross-references of changes in clause/subclause numbers.
b) The requirements of reference temperature 25 °C have been added in Table 7, Table 9,
Table 11, Table 13 and Table 15.

IEC 60384-9:2024 © IEC 2024 – 7 –
c) The table of temperature characteristics of capacitance for the reference temperature 25 °C
have been added in Table B.1, Table B.2 and Table B.3.
d) Annex B has been changed from informative to normative.
e) Clause C.5 (Test schedule for quality conformance inspection) has been newly added to
withdraw the blank detail specification: IEC 60384-9-1.
The text of this International Standard is based on the following documents:
Draft Report on voting
40/3145/FDIS 40/3162/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.
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/publications.
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.
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, or
• revised.
– 8 – IEC 60384-9:2024 © IEC 2024
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 9: Sectional specification –
Fixed capacitors of ceramic dielectric, Class 2

1 Scope
This part of IEC 60384 is applicable to fixed capacitors of ceramic dielectric with a defined
temperature coefficient (dielectric Class 2), intended for use in electronic equipment, including
leadless capacitors but excluding fixed surface mount multilayer capacitors of ceramic dielectric,
which are covered by IEC 60384-22 (Class 2).
Capacitors for electromagnetic interference suppression are not included, but are covered by
IEC 60384-14.
The object of this document is to specify preferred ratings and characteristics and to select from
IEC 60384-1:2021 the appropriate quality assessment procedures, tests and measuring
methods and to give general performance requirements for this type of capacitor. Test severities
and requirements specified in detail specifications referring to this document provide specific
test severities and requirements of an equal or higher performance level. Further information
on the conception of generic, sectional and detail specifications can be found in the Introduction
of IEC 60384-1:2021.
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 60384-1:2021, 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 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp

IEC 60384-9:2024 © IEC 2024 – 9 –
3.1
capacitor of ceramic dielectric, Class 2
capacitor which has a dielectric with a high permittivity and is suitable for by-pass and coupling
applications or for frequency discriminating circuits where low losses and high stability of
capacitance are not of major importance
Note 1 to entry: The ceramic dielectric is characterized by the non-linear change of capacitance over the category
temperature range (see Table 2).
3.2
subclass
maximum percentage change of capacitance within the category temperature range
with respect to the capacitance at the reference temperature 20 °C or 25 °C
Note 1 to entry: The subclass may be expressed in code form (see Table 2 and Annex B).
3.3
rated voltage
U
R
maximum DC voltage that can be applied continuously to the terminations of a capacitor at the
rated temperature
Note 1 to entry: Maximum DC voltage is the sum of the DC voltage and peak AC voltage or peak pulse voltage
applied to the capacitor.
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 document are classified into climatic categories in accordance
with the general rules given in IEC 60068-1:2013, Annex A.
For a reference temperature of 20 °C, the lower and upper category temperatures and the
duration of the damp heat, steady state test shall be chosen from the following:
lower category temperature: −55 °C, −40 °C, −25 °C and −10 °C
−
upper category temperature: +70 °C, +85 °C, +100 °C, +125 °C and +150 °C
−
− duration of the damp heat, steady state 4 days, 10 days, 21 days, and 56 days
test (40 °C, 93 % RH):
For a refence temperature of 25 °C, the lower and upper category temperatures shall be chosen
from Table B.1 in Annex B.
The severities for the cold and dry heat tests are the lower and upper category temperatures,
respectively.
4.2 Preferred values of ratings
4.2.1 Rated temperature
For capacitors covered by this document, the rated temperature is equal to the upper category
temperature.
– 10 – IEC 60384-9:2024 © IEC 2024
4.2.2 Rated voltage (U )
R
The preferred values of rated voltage are: (25, 40, 63, 100, 160, 250, 400, 630, 1 000, 1 600,
2 500, 4 000 and 6 300) V. These values conform to the basic series of preferred values R5
given in ISO 3. If other values are needed, they shall be chosen from the R10 series. The sum
of the DC voltage and the peak AC voltage or the peak to peak AC voltage, whichever is the
greater, applied to the capacitor shall not exceed the rated voltage.
4.2.3 Category voltage (U )
C
Since the rated temperature is defined as the upper category temperature, the category voltage
is equal to the rated voltage, as defined in IEC 60384-1:2021, 3.5.
4.2.4 Preferred values of nominal capacitance and associated tolerance values
4.2.4.1 Preferred values of nominal capacitance
Nominal capacitance values should be taken from the E3, E6 and E12 series given in IEC 60063.
4.2.4.2 Preferred tolerances on nominal capacitance
Table 1 denotes the preferred values of tolerance on nominal capacitance.
Table 1 – Preferred tolerance on nominal capacitance
Preferred series Tolerances Letter code
%
E3 and E6 −20/+80 Z
−20/+50 S
E6 ±20 M
E6 and E12 ±10 K
4.2.5 Temperature characteristic of capacitance
Table 2 shows the temperature characteristic with and without DC voltage applied for the
reference temperature 20 °C. The method of coding the subclass is also given; for example, a
dielectric with a percentage change of ±20 % without DC voltage applied over the temperature
range from −55 °C to +125 °C, will be defined as a dielectric of Class 2C1. The temperature
characteristics, category temperatures and corresponding codes for the reference temperature
25 °C are given in Annex B.
The temperature range, for which the temperature characteristics of the dielectric is defined, is
the same as the category temperature range.

IEC 60384-9:2024 © IEC 2024 – 11 –
Table 2 – Temperature characteristic of capacitance
Maximum capacitance change within Category temperature range and
the category temperature range with corresponding number code
respect to the capacitance at 20 °C
Sub-
measured with and without a DC voltage
−55/+150 −55/+125 −55/+85 −40/+85 −25/+85 +10/+85
class
applied
letter
°C °C °C °C °C °C
%
code
without DC with DC voltage
0 1 2 3 4 6
a
voltage applied applied
2B ±10
2C ±20
Requirements specified
2D +20/−30
in
2E +22/−56
the detail specification
2F +30/−80
2R ±15
When the upper category temperature is above 125 °C, the limits of capacitance change, both with and without DC
voltage applied, should be given in the detail specification.
a
DC voltage applied is either rated voltage or the voltage specified in the detail specification.
NOTE Annex B can be referred to for preferred values of the temperature characteristics for the reference
temperature 25 °C.
5 Test and measurement procedures
5.1 General
This Clause 5 supplements the information given in IEC 60384-1:2021, Clause 5 to Clause 10.
5.2 Special preconditioning
Unless otherwise specified in the detail specification, the special preconditioning, when
specified in this document before a test or a sequence of tests, shall be carried out under the
following conditions: exposure at upper category temperature or at such higher temperature as
may be specified in the detail specification for a period of 1 h, followed by recovery for a period
of 24 h ± 1 h at standard atmospheric conditions for testing.
NOTE Class 2 capacitors lose capacitance continuously with time following a logarithmic law (this is called ageing).
However if the capacitor is heated to a temperature above the Curie point of its dielectric then "de-ageing" takes
place, i.e. the capacitance lost through "ageing" is regained, and "ageing" recommences from the time when the
capacitor recools.
The purpose of special preconditioning is to bring the capacitor to a defined stage regardless of its previous history
(see Clause A.4 for further information).
5.3 Visual examination and check of dimensions
See IEC 60384-1:2021, 7.1.
5.4 Electrical tests
5.4.1 Capacitance
5.4.1.1 General
See IEC 60384-1:2021, 6.3, with the details of 5.4.1.2 and 5.4.1.3.

– 12 – IEC 60384-9:2024 © IEC 2024
5.4.1.2 Measuring conditions
The capacitance shall be measured in accordance with Table 3 and in accordance with the
details given below Table 3.
Table 3 – Measuring conditions
a
Reference temperature Subclass Measuring voltage
Referee voltage
2B, 2C, 2X 1,0 ± 0,2 V 1,0 ± 0,02 V
0,3 ± 0,2 V 0,3 ± 0,02 V
20 °C
2D, 2E, 2F, 2R
or as specified in the detail or as specified in the detail
specification specification
25 °C R,S,T,U 1,0 ± 0,2 V 1,0 ± 0,02 V
a
In case of dispute about results of measurements, referee voltage is applied.

Frequency: C < 100 pF f = 1 MHz unless otherwise specified in the detail specification.
N
C ≥ 100 pF f = 1 kHz ± 20 % for measuring purposes and 1 kHz for referee tests.
N
C > 10 μF f = 100 Hz or 120 Hz ± 20 % with measuring voltage 0,5 V ± 0,2 V
N
for measuring purposes and 100 Hz or 120 Hz for referee tests.
5.4.1.3 Requirements
The capacitance value shall correspond with the rated value taking into account the specified
tolerance.
For referee measurements the capacitance value shall be the value extrapolated to an ageing
time of 1 000 h, unless otherwise specified in the detail specification (for explanation see
Annex A).
5.4.2 Tangent of loss angle (tan δ)
5.4.2.1 General
See IEC 60384-1:2021, 6.4, with the details of 5.4.2.2 to 5.4.2.4.
5.4.2.2 Measuring conditions
See 5.4.1.
5.4.2.3 Accuracy
The accuracy of the measuring instruments shall be such that the measuring error does not
exceed 0,001.
5.4.2.4 Requirements
The tangent of loss angle shall not exceed 0,035, or such lower value as may be given in the
detail specification.
5.4.3 Insulation resistance (R )
i
5.4.3.1 General
See IEC 60384-1:2021, 6.1, with the details of 5.4.3.2 and 5.4.3.3.

IEC 60384-9:2024 © IEC 2024 – 13 –
5.4.3.2 Measuring conditions
See IEC 60384-1:2021, 6.1.2, with the following details:
For U < 100 V, the measuring voltage may be of any value not greater than U , the reference
R R
voltage being U .
R
The voltage shall be applied immediately at the specified value for 1 min ± 5 s for qualification
approval testing and periodic tests (Group C). For lot-by-lot testing (Group A), the test may be
terminated in a shorter time, if the required value of insulation resistance is reached.
The product of the internal resistance of the voltage source and the nominal capacitance of the
capacitor shall not exceed 1 s unless otherwise specified in the detail specification.
The charge current shall not exceed 0,05 A.
The insulation resistance (R ) shall be measured at the end of the 1 min period.
i
5.4.3.3 Requirements
The insulation resistance (R ) shall meet the requirements given in Table 4.
i
Table 4 – Insulation resistance requirements
Style Measuring points C ≤ 25 nF C > 25 nF
N N
R R × C
i i N
Insulated 1a and 1c
≥ 4 000 MΩ ≥ 100 s
Non-insulated 1a
5.4.4 Voltage proof
5.4.4.1 General
See IEC 60384-1:2021, 6.2, with the details of 5.4.4.2 to 5.4.4.4.
5.4.4.2 Test conditions
The product of R and the nominal capacitance C shall be smaller than or equal to 1 s.
i x
The charge current shall not exceed 0,05 A.
5.4.4.3 Test voltage
The voltages in Table 5 shall be applied between the measuring points of IEC 60384-1:2021,
Table 3, for a period of 1 min for qualification approval testing and for a period of 1 s for the lot-
by-lot quality conformance testing.

– 14 – IEC 60384-9:2024 © IEC 2024
Table 5 – Test voltages
Type Rated voltage Test voltage
V V
Leaded multilayer ceramic  U ≤ 100 2,5 U
R R
capacitors
100 < U ≤ 200 1,5 U + 100
R R
200 < U ≤ 500 1,3 U + 100
R
...