IEC 60384-1:2008

IEC 60384-1
Edition 4.0 2008-07
INTERNATIONAL
STANDARD
QC 300000
Fixed capacitors for use in electronic equipment –
Part 1: Generic specification
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 60384-1
Edition 4.0 2008-07
INTERNATIONAL
STANDARD
QC 300000
Fixed capacitors for use in electronic equipment –
Part 1: Generic specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XC
ICS 31.060 ISBN 2-8318-9907-9
– 2 – 60384-1 © IEC:2008(E)
CONTENTS
FOREWORD.7
1 General .9
1.1 Scope.9
1.2 Normative references .9
2 Technical data.10
2.1 Units and symbols .10
2.2 Terms and definitions .11
2.3 Preferred values.17
2.3.1 General .17
2.3.2 Preferred values of nominal capacitance .17
2.3.3 Preferred values of rated voltage.17
2.4 Marking .17
2.4.1 General .17
2.4.2 Coding.17
3 Quality assessment procedures.17
4 Tests and measurement procedures.18
4.1 General .19
4.2 Standard atmospheric conditions.19
4.2.1 Standard atmospheric conditions for testing .19
4.2.2 Recovery conditions .19
4.2.3 Referee conditions .20
4.2.4 Reference conditions.20
4.3 Drying .20
4.4 Visual examination and check of dimensions.20
4.4.1 Visual examination .20
4.4.2 Dimensions (gauging).20
4.4.3 Dimensions (detail).20
4.5 Insulation resistance .21
4.5.1 Preconditioning.21
4.5.2 Measuring conditions.21
4.5.3 Test points .21
4.5.4 Test methods.21
4.5.5 Temperature compensation .22
4.5.6 The relevant specification shall prescribe: .22
4.6 Voltage proof.23
4.6.1 Test circuit (for the test between terminations) .23
4.6.2 Test.24
4.6.3 Requirements .26
4.6.4 Conditions to be prescribed in the relevant specification.26
4.7 Capacitance .26
4.7.1 Measuring frequency and measuring voltage .26
4.7.2 Measuring equipment .26
4.7.3 Conditions to be prescribed in the relevant specification.26
4.8 Tangent of loss angle and equivalent series resistance (ESR).27
4.8.1 Tangent of loss angle .27
4.8.2 Equivalent series resistance (ESR).27

60384-1 © IEC:2008(E) – 3 –
4.9 Leakage current .27
4.9.1 Preconditioning.27
4.9.2 Test method .28
4.9.3 Power source .28
4.9.4 Measuring accuracy.28
4.9.5 Test circuit .28
4.9.6 Conditions to be prescribed in the relevant specification.28
4.10 Impedance .28
4.11 Self-resonant frequency and inductance.29
4.11.1 Self-resonant frequency (f ) .29
r
4.11.2 Inductance.32
4.11.3 Conditions to be prescribed in the relevant specification.32
4.12 Outer foil termination.32
4.13 Robustness of terminations .33
4.13.1 Test Ua – Tensile.33
4.13.2 Test Ub – Bending (half of the sample).33
4.13.3 Test Uc – Torsion (remaining sample) .33
4.13.4 Test Ud – Torque (for terminations with threaded studs or screws
and for integral mounting devices) .33
4.13.5 Visual examination .34
4.14 Resistance to soldering heat .34
4.14.1 Preconditioning.34
4.14.2 Test procedure .34
4.14.3 Recovery .34
4.14.4 Final inspection, measurement and requirements .34
4.15 Solderability .34
4.15.1 Preconditioning.34
4.15.2 Test procedure .35
4.15.3 Final inspection, measurements and requirements .35
4.16 Rapid change of temperature .35
4.16.1 Initial measurement .35
4.16.2 Test procedure .35
4.16.3 Final inspection, measurements and requirements .35
4.17 Vibration.36
4.17.1 Initial measurement .36
4.17.2 Test procedure .36
4.17.3 Electrical test.36
4.17.4 Final inspection, measurements and requirements .36
4.18 Bump .36
4.18.1 Initial measurement .36
4.18.2 Test procedure .36
4.18.3 Final inspection, measurements and requirements .36
4.19 Shock.36
4.19.1 Initial measurement .36
4.19.2 Test procedure .36
4.19.3 Final inspection, measurements and requirements .37
4.20 Container sealing .37
4.21 Climatic sequence .37
4.21.1 Initial measurements .37

– 4 – 60384-1 © IEC:2008(E)
4.21.2 Dry heat .37
4.21.3 Damp heat, cyclic, test Db, first cycle .37
4.21.4 Cold .37
4.21.5 Low air pressure.38
4.21.6 Damp heat, cyclic, test Db, remaining cycles .38
4.21.7 Final measurements .38
4.22 Damp heat, steady state.38
4.22.1 Initial measurement .38
4.22.2 Test procedure .38
4.22.3 Final inspection, measurements and requirements .39
4.23 Endurance.39
4.23.1 Initial measurements .39
4.23.2 Test procedure .39
4.23.3 Conditions to be prescribed in the relevant specification.39
4.23.4 Test voltage.39
4.23.5 Placement in the test chamber.40
4.23.6 Recovery .40
4.23.7 Final inspection, measurements and requirements .40
4.24 Variation of capacitance with temperature .41
4.24.1 Static method .41
4.24.2 Dynamic method.41
4.24.3 Methods of calculation.42
4.25 Storage .43
4.25.1 Storage at high temperature .43
4.25.2 Storage at low temperature.43
4.26 Surge .43
4.26.1 Initial measurement .43
4.26.2 Test procedure .43
4.26.3 Final inspection, measurements and requirements .45
4.26.4 Information to be given in the relevant detail specification .45
4.27 Charge and discharge tests and inrush current test .45
4.27.1 Initial measurement .45
4.27.2 Test procedure .45
4.27.3 Charge and discharge .47
4.27.4 Inrush current .47
4.27.5 Final inspection, measurements and requirements .47
4.28 Pressure relief (for aluminium electrolytic capacitors).47
4.28.1 a.c. test .47
4.28.2 d.c. test .47
4.28.3 Pneumatic test.47
4.28.4 Final inspection, measurements and requirements .48
4.29 Characteristics at high and low temperature .48
4.29.1 Test procedure .48
4.29.2 Requirements .48
4.30 Thermal stability test .48
4.31 Component solvent resistance.48
4.31.1 Initial measurements .48
4.31.2 Test procedure .48
4.31.3 Final inspection, measurements and requirements .49

60384-1 © IEC:2008(E) – 5 –
4.32 Solvent resistance of marking.49
4.32.1 Test procedure .49
4.32.2 Final inspection, measurements and requirements .49
4.33 Mounting (for surface mount capacitors only) .49
4.33.1 Substrate.49
4.34 Shear test .52
4.34.1 Test procedure .52
4.34.2 Final inspection, measurements and requirements .52
4.35 Substrate bending test .52
4.35.1 Test procedure .52
4.35.2 Recovery .52
4.35.3 Final inspection and requirements .52
4.36 Dielectric absorption.52
4.36.1 Test procedure .52
4.36.2 Requirement.53
4.37 Accelerated damp heat, steady state (for multilayer ceramic capacitors only).53
4.37.1 Mounting of capacitors .53
4.37.2 Initial measurement .53
4.37.3 Test procedure .53
4.37.4 Recovery .54
4.37.5 Final inspection, measurements and requirements .54
4.38 Passive flammability.54
4.38.1 Test procedure .54
4.38.2 Final inspection, measurements and requirements .54
4.39 High surge current test .55
4.39.1 Initial measurements .55
4.39.2 Test procedure .55
4.39.3 Requirements for the charging circuit .55
4.39.4 Nonconforming items.56
4.40 Voltage transient overload (for aluminium electrolytic capacitors with non-
solid electrolyte) .56
4.40.1 Initial measurement .56
4.40.2 Test procedure .56
4.40.3 Final inspection, measurements and requirements .57
4.40.4 Conditions to be prescribed in the relevant specification.57
Annex A (normative) Interpretation of sampling plans and procedures as described in
IEC 60410 for use within the IECQ system.58
Annex B (normative) Rules for the preparation of detail specifications for capacitors
and resistors for electronic equipment for use within the IECQ system.59
Annex C (normative) Layout of the first page of a PCP/CQC specification.60
Annex D (normative) Requirements for capability approval test report .61
Annex E (informative) Guide for pulse testing of capacitors .62
Annex F (informative) Guidance for the extension of endurance tests on fixed
capacitors .65
Annex G (normative) Damp heat, steady state with voltage applied, for metallized film
capacitors only .66
Annex Q (normative) Quality assessment procedures .67

Figure 1 – Reactive power against frequency.13

– 6 – 60384-1 © IEC:2008(E)
Figure 2 – Relation between category temperature range and applied voltage .16
Figure 3 – Voltage-proof test circuit .24
Figure 4 – Schematic diagram of the impedance measuring circuit .28
Figure 5 – Capacitor mounting arrangement .30
Figure 6 – Capacitor mounting arrangement .30
Figure 7 – Typical diagram of an absorption oscillator-wavemeter .31
Figure 8 – Schematic diagram of the measuring circuit .31
Figure 9 – Test circuit .32
Figure 10 – Test circuit for electrolytic capacitors .40
Figure 11 – Relay circuit .44
Figure 12 – Thyristor circuit .44
Figure 13 – Voltage waveform across capacitor .45
Figure 14 – Voltage and current waveform.46
Figure 15 – Suitable substrate for mechanical tests (may not be suitable for impedance
measurements) .51
Figure 16 – Suitable substrate for electrical tests.51
Figure 17 – High surge current test.55
Figure 18 – Voltage transient overload test circuit.56
Figure 19 – Voltage waveform .57
Figure Q.1 – General scheme for capability approval .70

Table 1 – Referee conditions .20
Table 2 – Measurement of insulation resistance.21
Table 3 – Measuring points.23
Table 4 – Tensile force .33
Table 5 – Torque .33
Table 6 – Number of cycles .38
Table 7 – Severities and requirements .54

60384-1 © IEC:2008(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 1: Generic specification
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60384-1 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment
This fourth edition cancels and replaces the third edition issued in 1999 and constitutes a
technical revision, including minor revisions related to tables, figures and references.
This edition contains the following significant technical changes with respect to the previous
edition:
• implementation of Annex Q which replaces Clause 3.
The text of this standard is based on the following documents:
FDIS Report on voting
40/1915/FDIS 40/1924/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 8 – 60384-1 © IEC:2008(E)
The QC number that appears on the front cover of this publication is the specification number
in the IECQ Quality Assessment System for Electronic Componenets (IECQ).
A list of all the parts of the IEC 60384 series, 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 publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later stage.
The contents of the corrigendum of November 2008 have been included in this copy.

60384-1 © IEC:2008(E) – 9 –
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 1: Generic specification
1 General
1.1 Scope
This part of IEC 60384 is a generic specification and is applicable to fixed capacitors for use
in electronic equipment.
It establishes standard terms, inspection procedures and methods of test for use in sectional
and detail specifications of electronic components for quality assessment or any other
purpose.
1.2 Normative references
The following referenced documents are indispensable for the application 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 60027, Letter symbols to be used in electrical technology
IEC 60050 (all parts), International Electrotechnical Vocabulary (IEV)
IEC 60062, Marking codes for resistors and capacitors
IEC 60063, Preferred number series for resistors and capacitors
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Tests A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Tests B: Dry heat
IEC 60068-2-6:2007, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-13:1983, Environmental testing – Part 2: Tests – Test M: Low air pressure
IEC 60068-2-14:1984, Environmental testing – Part 2: Tests – Test N: Change of temperature
IEC 60068-2-17:1994, Environmental testing – Part 2-17: Tests – Test Q: Sealing
IEC 60068-2-20:1979, Environmental testing – Part 2-20: Tests – Test T: Soldering
IEC 60068-2-21:2006, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices
IEC 60068-2-27:2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance:
Shock
IEC 60068-2-29:1987, Environmental testing – Part 2-29: Tests – Test Eb and guidance:
Bump
– 10 – 60384-1 © IEC:2008(E)
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-45:1980, Environmental testing – Part 2-45: Tests – Test XA and guidance:
Immersion in cleaning solvents
IEC 60068-2-54:2006, Environmental testing – Part 2-54: Tests – Test Ta: Solderability
testing of electronic components by the wetting balance method
IEC 60068-2-58:2004, Environmental testing – Part 2-58: Tests – Test Td: Test methods for
solderability, resistance to dissolution of metallization and to soldering heat of surface
mounting devices (SMD)
IEC 60068-2-69:2007, Environmental testing – Part 2: Tests – Test Te: Solderability testing of
electronic components for surface mounting devices (SMD) by the wetting balance method
IEC 60068-2-78:2001, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat,
steady state
IEC 60294, Measurement of the dimensions of a cylindrical component having two axial
terminations
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60617, Graphical symbols for diagrams
IEC 60695-11-5:2004, Fire hazard testing – Part 11-5: Test flames – Needle-flame test
method – Apparatus, confirmatory test arrangement and guidance
IEC 60717, Method for the determination of the space required by capacitors and resistors
with unidirectional terminations
IEC 61193-2, Quality assessment systems – Part 2: Selection and use of sampling plans for
inspection of electronic components and packaging
IEC 61249-2-7:2002, Materials for printed boards and other interconnecting structures –
Part 2-7: Reinforced base materials clad and unclad – Epoxide woven E-glass laminated
sheet of defined flammability (vertical burning test), copper-clad
IEC QC 001002-3, Rules of Procedure – Part 3: Approval procedures
ISO 3, Preferred numbers – Series of preferred numbers
ISO 1000, SI units and recommendations for the use of their multiples and of certain other units
ISO 9000, Quality management systems – Fundamentals and vocabulary
2 Technical data
2.1 Units and symbols
Units, graphical symbols and letter symbols should, whenever possible, be taken from the
following publications:
—————————
To be published.
60384-1 © IEC:2008(E) – 11 –
– IEC 60027;
– IEC 60050 (series);
– IEC 60617;
– ISO 1000.
When further items are required, they should be derived in accordance with the principles of
the publications listed above.
2.2 Terms and definitions
For the purposes of this document, the following terms and definitions apply, in alphabetical
order.
2.2.1
a.c. capacitor
capacitor designed essentially for application with alternating voltages
2.2.2
bipolar capacitor (for electrolytic capacitors)
electrolytic capacitor designed to withstand an alternating voltage and/or reversal of the
applied direct voltage
2.2.3
category of passive flammability
category of passive flammability is given by the maximum burning time after a specified time
of flame application
2.2.4
category temperature range
range of ambient temperatures for which the capacitor has been designed to operate
continuously; this is given by the lower and upper category temperature
2.2.5
category voltage (U )
C
maximum voltage which may be applied continuously to a capacitor at its upper category
temperature
2.2.6
d.c. capacitor
capacitor designed essentially for application with direct voltage
NOTE A d.c. capacitor may not be suitable for use on a.c. supplies.
2.2.7
family (of electronic components)
group of components which predominantly displays a particular physical attribute and/or fulfils
a defined function
2.2.8
grade
term to indicate an additional general characteristic concerning the intended application of the
component
– 12 – 60384-1 © IEC:2008(E)
2.2.9
insulated capacitor
capacitor in which all terminations of a section may be raised to a potential different (but not
less than the rated voltage) from that of any conducting surface with which the case is liable
to come into contact in normal use
2.2.10
lower category temperature
minimum ambient temperature for which a capacitor has been designed to operate
continuously
2.2.11
maximum storage temperature
maximum ambient temperature which the capacitor withstands in the non-operating condition
without damage
2.2.12
maximum temperature of a capacitor
temperature at the hottest point of its external surface
NOTE The terminations are considered to be part of the external surface.
2.2.13
minimum storage temperature
minimum ambient temperature which the capacitor withstands in the non-operating condition
without damage
2.2.14
minimum temperature of a capacitor
temperature at the coldest point of the external surface
NOTE The terminations are considered to be part of the external surface.
2.2.15
nominal capacitance (C )
N
designated capacitance value usually indicated on the capacitor
2.2.16
passive flammability
ability of a capacitor to burn with a flame as a consequence of the application of an external
source of heat
2.2.17
polar capacitor (for electrolytic capacitors)
capacitor intended for use with a unidirectional voltage connected according to the polarity
indication
2.2.18
pulse capacitor
capacitor for use with pulses of current or voltage
NOTE The definitions of IEC 60469-1 and IEC 60469-2 apply.
2.2.19
pulse equivalent circuit of a capacitor
equivalent circuit consisting of an ideal capacitor in series with its residual inductance and the
equivalent series resistance (ESR)

60384-1 © IEC:2008(E) – 13 –
NOTE For pulse operation the equivalent series resistance will be similar to, but not identical with, the ESR
measured with a sinusoïdal voltage. The pulse ESR should take into account the series of harmonics in the pulse
and the variation of the losses with frequency.
2.2.20
rated a.c. load
maximum sinusoidal a.c. load which may be applied continuously to the terminations of a
capacitor at any temperature between the lower category temperature and the rated
temperature (see 2.2.24); it may be expressed:
a) at low frequencies as a rated a.c. voltage;
b) at high frequencies as a rated a.c. current;
c) at intermediate frequencies as a rated reactive power (var).
This is shown in Figure 1.
Reactive power
limited (var)
Voltage limited
Current limited
Frequency
IEC  1190/08
NOTE 1 For a particular type of capacitor, it may be necessary to specify one or more of the above
characteristics.
NOTE 2 Capacitors within the scope of this specification are normally less than 500 var at 50 Hz to 60 Hz. Low
frequencies may be 50 Hz to 60 Hz, 100 Hz to 120 Hz, or 400 Hz. Voltages may be up to 600 V r.m.s. at 50 Hz to
60 Hz. However, capacitors for filters, transmitter or converter circuits may be required to operate under power
over a wide range of frequencies and up to 10 kvar at the higher frequencies with voltages up to 1 000 V r.m.s.
Figure 1 – Reactive power against frequency
2.2.21
rated pulse load
maximum pulse load which may be applied at a certain pulse repetition frequency to the
terminations of a capacitor at any temperature between the lower category temperature and
the rated temperature (see 2.2.24); it may be expressed as a) and b) and any of the
remaining items:
a) peak current per μF or du/dt (V/μs);
b) relative duration of charge and discharge periods;
c) current;
d) peak voltage;
e) peak reverse voltage;
f) pulse repetition frequency (see note 1);
g) maximum active power.
These parameters are fixed for periodic pulses.
NOTE 1 In the case of intermittent pulses, the duty cycle should be specified. In the case of random pulses, the
total number expected over a given time period should be stated.
Reactive power
– 14 – 60384-1 © IEC:2008(E)
NOTE 2 The r.m.s. pulse current should be calculated in accordance with IEC 60469-1, 2.5.2.4. In the case of
intermittent or random pulses, the time interval should be chosen to correspond with the maximum temperature
rise.
2.2.22
rated ripple current
r.m.s. value of the maximum allowable alternating current of a specified frequency, at which
the capacitor may be operated continuously at a specified temperature
NOTE As the ripple current will generate a ripple voltage across the capacitor, the sum of the direct voltage and
the peak value of the alternating voltage applied to the capacitor should not exceed the rated voltage or
temperature derated voltage as applicable.
2.2.23
rated ripple voltage
r.m.s. value of the maximum allowable alternating voltage at a specified frequency
superimposed on the d.c. voltage at which the capacitor may be operated continuously at a
specified temperature
NOTE The sum of the direct voltage and the peak value of the alternating voltage applied to the capacitor should
not exceed the rated voltage or temperature derated voltage, as applicable.
2.2.24
rated temperature
maximum ambient temperature at which the rated voltage may be continuously applied
2.2.25
rated voltage (U )
R
2.2.25.1
rated d.c. voltage
maximum d.c. voltage which may be applied continuously to a capacitor at the rated
temperature
NOTE Maximum d.c. voltage is the sum of the d.c. voltage and peak a.c. voltage or peak pulse voltage applied to
the capacitor.
2.2.25.2
rated a.c. voltage
maximum r.m.s. alternating voltage which may be applied continuously to a capacitor at the
rated temperature and at a
...