IEC TS 63337:2024

IEC TS 63337 ®
Edition 1.0 2024-02
TECHNICAL
SPECIFICATION
colour
inside
Basic qualification of DC-link film capacitors for automotive use – General
requirements, test conditions and tests

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IEC TS 63337 ®
Edition 1.0 2024-02
TECHNICAL
SPECIFICATION
colour
inside
Basic qualification of DC-link film capacitors for automotive use – General

requirements, test conditions and tests

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.060.99  ISBN 978-2-8322-8180-2

– 2 – IEC TS 63337:2024  IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviated terms . 8
3.1 General terms and definitions . 8
3.2 Terms and definitions related to operating voltages and temperatures . 9
3.3 Symbols and abbreviated terms . 10
4 General requirements . 11
4.1 Deviations from this document . 11
4.2 Service life and qualification tests . 11
4.3 Standard tolerances . 12
4.4 Standard values . 12
4.5 Thermal equilibrium . 13
4.6 Sampling rates and measured value resolutions . 13
4.7 Parameter test . 13
4.8 Physical analysis . 13
4.9 Restriction on performance . 14
5 Electrical characterisation. 14
5.1 General . 14
5.2 E-01 Capacitance . 14
5.2.1 Purpose . 14
5.2.2 Test . 14
5.3 E-02 insulation resistance between terminals . 14
5.3.1 Purpose . 14
5.3.2 Test . 14
5.4 E-03 ESR . 14
5.4.1 Purpose . 14
5.4.2 Test . 15
5.5 E-04 ESL . 15
5.5.1 Purpose . 15
5.5.2 Test . 15
5.6 E-05 External insulation terminal to case . 15
5.6.1 Purpose . 15
5.6.2 Test . 15
6 Mechanical characterisation . 16
6.1 M-01 Geometry . 16
6.1.1 Purpose . 16
6.1.2 Test . 16
6.2 M-02 Visual . 16
inspection
6.2.1 Purpose . 16
6.2.2 Test . 16
7 Environmental and exposure tests . 16
7.1 B-01 Thermal shock . 16
7.1.1 Purpose . 16
7.1.2 Test . 16

7.2 B-02 Damp heat, steady state . 17
7.2.1 Purpose . 17
7.2.2 Test . 17
7.3 B-03 High temperature load . 17
7.3.1 Purpose . 17
7.3.2 Condition A: high temperature – overload . 17
7.3.3 Condition B: high temperature – operating life . 17
7.4 B-04 Vibration . 18
7.4.1 Purpose . 18
7.4.2 Test (typical profile) . 18
7.5 B-05 Charge/ discharge test . 19
7.5.1 Purpose . 19
7.5.2 Test . 19
7.6 B-06 Short-circuit test . 19
7.6.1 Purpose . 19
7.6.2 Test . 20
7.7 Acceptance criteria . 20
8 Test sequence diagram . 21
9 Flammability (if required) . 22
Annex A (informative) Example data sheet . 23
Annex B (normative) Guideline for qualification in case of changes . 25
B.1 General . 25
B.2 Basic Qualification-Table Application (completion by component manufacturer) . 25
B.3 Evaluation Levels are categorized as follows . 25
B.3.1 Categories . 25
B.3.2 Important notes . 25
Annex C (normative) ISO 21498-1, Voltage class B definitions in relation to capacitor

specifications . 34
C.1 General . 34
C.2 Voltage sub-classes and operating status . 34
C.3 Working voltage . 36
C.4 Overvoltage limit . 36
C.5 Relation to capacitor specifications . 36
Bibliography . 38

Figure 1 – Vibration profile . 19
Figure 2 – Test sequence . 21
Figure C.1 – Example of a voltage – time profile in relation to voltage limits . 35

Table 1 – Example for a design service life . 11
Table 2 – Definitions of standard tolerances for set values . 12
Table 3 – Definitions of accuracy for measured values . 12
Table 4 – Definitions of standard values . 12
Table 5 – Parameters of the vibration profile . 18
Table C.1 – Voltage sub-classes . 34
Table C.2 – Component operating status . 35
Table C.3 – Relation of capacitor specification terms to voltage range . 36
Table C.4 – Relation between operation and test conditions . 37

– 4 – IEC TS 63337:2024  IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BASIC QUALIFICATION OF DC-LINK FILM
CAPACITORS FOR AUTOMO
...