IEC 60384-14:2013

IEC 60384-14 ®
Edition 4.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –
Part 14: Sectional specification – Fixed capacitors for electromagnetic
interference suppression and connection to the supply mains

Condensateurs fixes utilisés dans les équipements électroniques –
Partie 14: Spécification intermédiaire – Condensateurs fixes d'antiparasitage
et raccordement à l'alimentation

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IEC 60384-14 ®
Edition 4.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –

Part 14: Sectional specification – Fixed capacitors for electromagnetic

interference suppression and connection to the supply mains

Condensateurs fixes utilisés dans les équipements électroniques –

Partie 14: Spécification intermédiaire – Condensateurs fixes d'antiparasitage

et raccordement à l'alimentation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 31.060.10 ISBN 978-2-83220-828-1

– 2 – 60384-14 © IEC:2013
CONTENTS
FOREWORD . 6
1 General . 8
1.1 Scope . 8
1.2 Object . 8
1.3 Normative references . 8
1.4 Information to be given in a detail specification . 9
1.4.1 Outline drawing and dimensions . 9
1.4.2 Mounting . 9
1.4.3 Ratings and characteristics . 10
1.4.4 Marking . 10
1.5 Terms and definitions . 10
1.6 Marking . 15
1.6.1 Marking of capacitors . 15
1.6.2 Marking of packaging. 15
1.6.3 Additional marking . 16
1.7 Classification of Class X and Class Y capacitors . 16
1.7.1 Classification of X capacitors . 16
1.7.2 Classification of Y capacitors . 16
2 Preferred ratings and characteristics . 17
2.1 Preferred characteristics . 17
2.1.1 Preferred climatic categories . 17
2.2 Preferred values of ratings . 18
2.2.1 Nominal capacitance (C ) . 18
N
2.2.2 Tolerance on nominal capacitance . 18
2.2.3 Rated voltage (U ) . 18
R
2.2.4 Nominal resistance (R ) . 18
N
2.2.5 Rated temperature . 18
2.2.6 Passive flammability . 18
2.3 Requirements for sleeving, tape, tubing and wire insulation . 18
3 Assessment procedures . 19
3.1 Primary stage of manufacture . 19
3.2 Structurally similar components . 19
3.3 Certified records of released lots . 19
3.4 Approval testing . 19
3.4.1 Safety tests only approval. 19
3.4.2 Qualification approval . 19
3.4.3 Qualification approval on the basis of the fixed sample size
procedure . 19
3.5 Quality conformance inspection . 30
3.5.1 Formation of inspection lots . 30
3.5.2 Test schedule . 31
3.5.3 Delayed delivery . 31
3.5.4 Assessment level . 31
4 Test and measurement procedures . 32
4.1 Visual examination and check of dimensions . 32
4.1.1 Creepage distances and clearances . 32

60384-14 © IEC:2013 – 3 –
4.2 Electrical tests . 33
4.2.1 Voltage proof . 33
4.2.2 Capacitance . 35
4.2.3 Tangent of loss angle . 35
4.2.4 Resistance (Equivalent Series Resistance (ESR)) (for RC units only) . 36
4.2.5 Insulation resistance . 36
4.3 Robustness of terminations . 37
4.4 Resistance to soldering heat . 37
4.4.1 Test conditions . 37
4.4.2 Final inspection, measurements and requirements . 38
4.5 Solderability . 38
4.5.1 Test conditions . 38
4.5.2 Requirements . 38
4.6 Rapid change of temperature . 38
4.6.1 Final inspection . 38
4.7 Vibration . 38
4.7.1 Test conditions . 39
4.7.2 Final inspection . 39
4.8 Bump . 39
4.8.1 Test conditions . 39
4.8.2 Final inspection, measurements and requirements . 39
4.9 Shock . 39
4.9.1 Test conditions . 39
4.9.2 Final inspection, measurements and requirements . 40
4.10 Container sealing . 40
4.10.1 Test conditions . 40
4.10.2 Requirements . 40
4.11 Climatic sequence . 40
4.11.1 Initial measurements . 40
4.11.2 Dry heat . 41
4.11.3 Damp heat, cyclic, test Db, first cycle . 41
4.11.4 Cold . 41
4.11.5 Damp heat, cyclic, test Db, remaining cycles . 41
4.11.6 Final inspection, measurements and requirements . 41
4.12 Damp heat, steady state . 41
4.12.1 Initial measurements . 42
4.12.2 Test conditions . 42
4.12.3 Final inspection, measurements and requirements . 42
4.13 Impulse voltage . 42
4.13.1 Initial measurements . 42
4.13.2 Test conditions . 43
4.13.3 Requirements . 43
4.14 Endurance . 44
4.14.1 Test conditions . 44
4.14.2 Initial measurements . 44
4.14.3 Endurance for Class X capacitors and RC units containing Class X
capacitors . 44
4.14.4 Endurance for Class Y capacitors and RC units containing Class Y
capacitors . 45

– 4 – 60384-14 © IEC:2013
4.14.5 Endurance for the lead-through arrangements . 45
4.14.6 Test conditions – Combined voltage/current tests . 45
4.14.7 Final inspection, measurements and requirements . 46
4.15 Charge and discharge . 46
4.15.1 Initial measurements . 46
4.15.2 Test conditions . 46
4.15.3 Final measurements and requirements . 47
4.16 Radiofrequency characteristics . 47
4.17 Passive flammability test . 47
4.17.1 Testing according to IEC 60384-1 . 47
4.17.2 Alternative passive flammability test . 48
4.18 Active flammability test . 49
4.18.3 Adjustment of U . 50
i
4.18.4 Requirements . 50
4.19 Component solvent resistance (if applicable) . 50
4.20 Solvent resistance of the marking . 51
Annex A (normative) Circuit for the impulse voltage test . 52
Annex B (normative) Circuit for the endurance test . 54
Annex C (normative) Circuit for the charge and discharge test . 55
Annex D (normative) Declaration of design (confidential to the manufacturer and the
certification body) . 56
Annex E (informative) Pulse test circuits . 57
Annex F (normative) Particular requirements for safety test of surface-mounting
capacitors . 59
Annex G (informative) Capacitance ageing of fixed capacitors of ceramic dielectric,
Class 2 . 62
Bibliography . 64

Figure 1 – Two-terminal EMI suppression capacitor . 11
Figure 2 – RC unit. 11
Figure 3 – Lead-through capacitor (coaxial) . 11
Figure 4 – Lead-through capacitors . 12
Figure 5 – By-pass capacitors . 13
Figure 6 – Test duration (s) . 30
Figure 7 – Impulse wave form . 43
Figure 8 – Typical circuit for pulse loading of capacitors under a.c. voltage . 49
Figure 9 – Fundamental a.c. wave with randomly, not synchronized, superimposed
high-voltage pulse. 50
Figure A.1 – Impulse voltage test circuit . 52
Figure B.1 – Endurance test circuit . 54
Figure C.1 – Charge and discharge test circuit . 55
Figure F.1 – Example of test substrate for safety test according to Table F.1 . 61

Table 1 – Classification of Class X capacitors . 16
Table 2 – Classification of Class Y capacitors . 17
Table 3 – Sampling plan – Tests concerning safety requirements only . 21

60384-14 © IEC:2013 – 5 –
Table 4 – Sampling plan – Safety and performance tests qualification approval –
Assessment level DZ . 22
Table 5 – Test schedule and sampling plan for lot-by-lot tests . 23
Table 6 – Test schedule for safety tests only (1 of 2) . 24
Table 7 – Test schedule for safety and performance tests qualification approval –
Assessment level DZ . 26
Table 8 – Assessment level . 32
Table 9 – Creepage distances and clearances . 33
Table 10 – Voltage proof . 35
Table 11 – Insulation resistance – Safety tests only . 36
Table 12 – Insulation resistance – Safety and performance tests . 37
Table 13 – Resistance to soldering heat – Requirements . 38
Table 14 – Climatic sequence – Requirements . 41
Table 15 – Damp heat, steady state – Requirements . 42
Table 16 – Endurance – Requirements . 46
Table 17 – Charge and discharge – Requirements . 47
Table A.1 – Values of C , C , R , R , C . 52
X T P S p
Table A.2 – Values and tolerances of C , t , t . 53
X r d
Table F.1 – Test schedule and sampling plan for safety test of surface mount
capacitors . 60

– 6 – 60384-14 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 14: Sectional specification –
Fixed capacitors for electromagnetic interference
suppression and connection to the supply mains

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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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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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 60384-14 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This fourth edition cancels and replaces the third edition published in 2005. It constitutes a
technical revision. All changes that have been agreed upon can be categorized as minor
revisions.
The text of this standard is based on the following documents:
FDIS Report on voting
40/2199/FDIS 40/2232/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.

60384-14 © IEC:2013 – 7 –
A list of all the parts of the IEC 60384 series, published under the general title Fixed
capacitors for use in electronic equipment, can be found on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.
The contents of the corrigendum of April 2016 have been included in this copy.

– 8 – 60384-14 © IEC:2013
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 14: Sectional specification –
Fixed capacitors for electromagnetic interference
suppression and connection to the supply mains

1 General
1.1 Scope
This part of IEC 60384 applies to capacitors and resistor-capacitor combinations which will be
connected to an a.c. mains or other supply with nominal voltage not exceeding 1 000 V a.c.
(r.m.s.) or 1 000 V d.c. and with a nominal frequency not exceeding 100 Hz.
1.2 Object
The principal object of this part of IEC 60384 is to prescribe preferred ratings and
characteristics and to select from IEC 60384-1, the appropriate quality assessment
procedures, tests and measuring methods and to give general performance requirements for
this type of capacitor. Test severities and requirements prescribed in detail specifications
referring to this sectional specification will be of equal or higher performance level; lower
performance levels are not permitted.
This standard also provides a schedule of safety tests to be used by national testing stations
in countries where approval by such stations is required.
The overvoltage categories in combination with the a.c. mains voltages for the capacitors
classified in this standard should be taken from IEC 60664-1.
1.3 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60063, Preferred number series for resistors and capacitors
IEC 60065:2001, Audio, video and similar electronic apparatus – Safety requirements
Amendment 1:2005
Amendment 2:2010
IEC 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60068-2-17, Environmental testing – Part 2-17: Tests – Test Q: Sealing
IEC 60384-1:2008, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
IEC 60417, Graphical symbols for use on equipment

60384-14 © IEC:2013 – 9 –
IEC 60664-1, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
IEC 60940, Guidance information on the application of capacitors, resistors, inductors and
complete filter units for radio interference suppression
IEC 61193-2, Quality assessment systems – Part 2: Selection and use of sampling plans for
inspection of electronic components and packages
IEC 61210, Connecting devices – Flat quick-connect terminations for electrical copper
conductors – Safety requirements
CISPR 17, Methods of measurement of the suppression characteristics of passive EMC
filtering devices
ISO 7000, Graphical symbols for use on equipment – Index and synopsis
1.4 Information to be given in a detail specification
Detail specifications shall be derived from the relevant blank detail specification.
Detail specifications shall not specify requirements inferior to those of the generic, sectional
or blank detail specification. When more severe requirements are included, they shall be
listed in 1.9 of the detail specification, and indicated in the test schedules, for example, by an
asterisk.
The following information shall be given in each detail specification and the values quoted
shall preferably be selected from the appropriate clause of this sectional specification.
NOTE The information given in 1.4.1 may, for convenience, be presented in tabular form.
1.4.1 Outline drawing and dimensions
There shall be an illustration of the capacitor as an aid to easy recognition and for comparison
of the capacitor with others. Dimensions and their associated tolerances, which affect
interchangeability and mounting, shall be given in the detail specification. All dimensions shall
preferably be stated in millimetres; however, when the original dimensions are given in
inches, the converted metric dimensions in millimetres shall be added.
Normally, the numerical values shall be given for the length, width and height of the body and
the wire spacing, or for cylindrical types, the body diameter and the length and diameter of
the terminations. When necessary, for example when a number of capacitance values/voltage
ranges are covered by a detail specification, their dimensions and their associated tolerances
shall be placed in a table below the drawing.
When the configuration is other than that described above, the detail specification shall state
such dimensional information as will adequately describe the capacitor. When the capacitor is
not designed for use on printed boards, this shall be clearly stated in the detail specification.
1.4.2 Mounting
The detail specification shall specify the method of mounting to be applied for normal use and
for the application of the vibration, bump or shock tests. The capacitors shall be mounted by
their normal means. The design of the capacitor may be such that special mounting fixtures

– 10 – 60384-14 © IEC:2013
are required in its use. In this case, the detail specification shall describe the mounting
fixtures and they shall be used in the application of the vibration, bump or shock tests.
If recommendations for mounting for "normal" use are made, they should be included in the
detail specification under "1.8 Additional information (Not for inspection purposes)". If
recommendations are included, a warning can be given that the full vibration, bump and shock
performance may not be available if mounting methods other than those specified in 1.1 of the
detail specification are used.
1.4.3 Ratings and characteristics
The ratings and characteristics shall be in accordance with the relevant clauses of this
specification, together with the following.
1.4.3.1 Nominal capacitance range
The preferred range of capacitance values should follow 2.2.1 of this standard.
When products approved to the detail specification have different ranges, the following
statement should be added: "The range of values available in each voltage range is given in
the register of approvals, available for example on the website www.iecq.org”.
1.4.3.2 Nominal resistance range (if applicable)
The preferred range of resistance values should follow 2.2.4 of this standard
1.4.3.3 Particular characteristics
Additional characteristics may be listed, when they are considered necessary to specify the
component adequately for design and application purposes.
1.4.4 Marking
The detail specification shall specify the content of the marking on the capacitor and on the
package. See also 1.6 of this standard.
1.5 Terms and definitions
For the purposes of this document, the terms and definitions of IEC 60384-1, as well as the
following, apply.
NOTE Some definitions of IEC 60384-1 have been expanded, as is indicated by a note.
1.5.1
a.c. capacitor
capacitor designed essentially for application with a power-frequency alternating voltage
Note 1 to entry: a.c. capacitors may be used on d.c. supplies having the same voltage as the a.c. r.m.s. rated
voltage of the capacitor.
1.5.2
electromagnetic interference suppression capacitor
radio interference suppression capacitor
a.c. capacitor used for the reduction of electromagnetic interference caused by electrical or
electronic apparatus, or other sources

60384-14 © IEC:2013 – 11 –
1.5.3
capacitor of Class X
RC unit of Class X
capacitor or RC unit of a type suitable for use in situations where failure of the capacitor or
RC unit would not lead to danger of electrical shock but could result in a risk of fire
1.5.4
capacitor of Class Y
RC unit of Class Y
capacitor or RC unit of a type suitable for use in situations where failure of the capacitor could
lead to danger of electric shock
1.5.5
two-terminal capacitor
electromagnetic interference suppression capacitor having two terminals
SEE: Figure 1.
IEC  1311/13
Figure 1 – Two-terminal EMI suppression capacitor
1.5.6
series RC unit
functional combination of a resistor in series with a capacitor of Class X or Y
SEE: Figure 2.
IEC  1312/13
Figure 2 – RC unit
Note 1 to entry: In this standard, where the word "capacitor" appears, the words "capacitor or RC unit" should be
understood where the context permits.
1.5.7
lead-through capacitor,
capacitor with a central current-carrying conductor surrounded by a capacitor element which
is symmetrically bonded to the central conductor and to the outer casing to form a coaxial
construction; it is coaxially mounted
SEE: Figure 3.
Central conductor
carrying supply current
Earthed circular
mounting flange
IEC  1313/13
Figure 3 – Lead-through capacitor (coaxial)

– 12 – 60384-14 © IEC:2013
1.5.8
lead-through capacitor,
capacitor in which the supply currents flow through or across the electrodes
SEE: Figures 4a, 4b, 4c and 4d.

IEC  1314/13
Figure 4a – Lead-through capacitor for symmetrical use (non-coaxial)

IEC  1315/13
Earthed metal case
Figure 4b – Lead-through capacitor for asymmetrical use (non-coaxial)

IEC  1316/13
Earthed metal case
Figure 4c – Multiple unit lead-through capacitor (non-coaxial)
for symmetrical and asymmetrical use

IEC  1317/13
Figure 4d – Multiple unit lead-through capacitor
Figure 4 – Lead-through capacitors
1.5.9
by-pass capacitor
capacitor where radiofrequency interference currents are by-passed

60384-14 © IEC:2013 – 13 –
Note 1 to entry: There are three common forms: single, delta and T-connected. The single capacitor consists of a
capacitor in a metal case with one termination connected to the case as in Figure 5a; the delta form consists of an
X-capacitor and two Y2-capacitors arranged in a delta network as in Figure 5b; the T-connected form consists of
three capacitors C , C and C connected in T as shown in Figure 5c.
A B C
The delta and T-connected forms are electrically equivalent (star-delta transformation). In the T-connected form the
X-capacitor is the result of the series connection of C – C and the Y-capacitors are the results of the series
B C
connections of C – C and C – C .
A B A C
When T-connected capacitors are submitted to tests, and it is stated that voltages shall be applied across the X-
capacitors, such voltages shall be applied between the line and neutral terminations. Similarly, when it is stated
that voltages shall be applied across the Y-capacitors, such voltages shall be applied between the line and neutral
terminations connected together and the earth termination.

SEE: Figures 5a, 5b and 5c.
IEC  1318/13
Figure 5a – Single by-pass capacitor

Y
X
Y
IEC  1319/13
Figure 5b – Delta by-pass capacitor (in metallic housing)

L
C
A
C
B
C
C
N
IEC  1320/13
Figure 5c – Example of a T-connected by-pass capacitor (in non-metallic housing)
NOTE For capacitors with non-metallic housings, the earth connection is brought out as a separate termination as
is shown in Figure 5c.
Figure 5 – By-pass capacitors
– 14 – 60384-14 © IEC:2013
1.5.10
rated voltage
either the r.m.s. operating voltage of rated frequency, or the d.c. operating voltage, which may
be applied continuously to the terminations of a capacitor at any temperature between the
lower and the upper category temperatures
Note 1 to entry: This implies, for capacitors covered by this standard, that the category voltage is the same as the
rated voltage.
1.5.11
rated power,
maximum power which can be dissipated by the RC unit at the rated temperature during
continuous operation
1.5.12
upper category temperature
maximum surface temperature for which the capacitor has been designed to operate
continuously
Note 1 to entry: For lead-through capacitors and series RC units, the external surface temperature can be
affected by internal heating due to the lead-through current. The terminations of a capacitor are considered to be
part of the external surface.
Note 2 to entry: This definition replaces that given in IEC 60384-1:2008, 2.2.41, because suppression capacitors
in accordance with this standard are intended to be connected to the mains network and may have internal heat
generation as a result.
1.5.13
lower category temperature
minimum surface temperature for which the capacitor has been designed to operate
continuously
Note 1 to entry: This definition replaces that given in IEC 60384-1:2008, 2.2.10.
1.5.14
rated temperature,
maximum ambient temperature at which a lead-through capacitor can carry its rated lead-
through current or a series RC unit can dissipate its rated power
Note 1 to entry: This definition replaces that in IEC 60384-1:2008, 2.2.24.
1.5.15
insertion loss
ratio of the voltage before and after the insertion of the suppressor as measured at the
terminations
Note 1 to entry: When measured in decibels, the insertion loss is 20 times the logarithm to base 10 of the ratio
stated.
1.5.16
rated current of the conductors,
maximum permissible current flowing through the conductors of the capacitor at the rated
temperature during continuous operation
1.5.17
main resonant frequency,
lowest frequency at which the impedance of the capacitor is a minimum when applying a
sinusoidal voltage
1.5.18
impulse voltage
periodic transient voltage of a defined waveform as described in IEC 60060-1

60384-14 © IEC:2013 – 15 –
1.5.19
passive flammability
ability of a capacitor to burn with a flame as a consequence of the application of an external
source of heat
1.5.20
active flammability
ability of a capacitor to burn with a flame as a consequence of electric loading
1.6 Marking
See IEC 60384-1:2008, 2.4 with the following details.
The 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) manufacturer's name or trademark;
b) manufacturer's type designation or the type designation given in the detail specification;
c) capacitor class and subclass;
d) recognized approval mark;
e) nominal capacitance(s) and nominal resistance;
f) rated voltage and nature of supply (alternating voltage may be indicated by the symbol
(IEC 60417-5032:2002) and direct voltage by the symbol (IEC 60417-5031:2002) or
 , also a.c. and d.c. respectively for alternating voltage and direct voltage can be
used;
g) the method of connection, if necessary;
h) rated current of the conductor (
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