IEC TS 63337:2024

Basic qualification of DC-link film capacitors for automotive use - General requirements, test conditions and tests

IEC TS 63337:2024 provides requirements, test conditions and tests to validate characteristics including the service life of customized DC-link film capacitors for use in motor vehicle components.
Standard DC-link capacitors qualified according to other IEC standards or AEC-Q200 are excluded from the scope of this document.
The requirements, test conditions and tests listed in this document apply to customized film capacitors developed for use in motor vehicle power electronics for the application as a DC-link capacitor in HV applications or in the intermediate circuit of the 48 V on-board electrical system.
These qualification requirements can be expanded or adapted for the application of technologically innovative designs, if necessary. The content and scope of supplements is therefore to be specified and documented in coordination between the responsible parties prior to sourcing.
Power electronics in the motor vehicle need to be tested in accordance with the environmental qualification standards of the vehicle manufacturers.
The tests in this document do not replace the tests specified in the Component Requirement Specifications for complete vehicle components or additional or deviating further requirements, test conditions and tests described therein.
This document contains no tests to validate the thermal interface between capacitors, power electronics and the cooling system on the component level.

General Information

• Status: Published
• Publication Date: 15-Feb-2024
• ICS: 31.060.99 - Other capacitors
• Technical Committee: TC 40 - Capacitors and resistors for electronic equipment
• Drafting Committee: PT 63337 - TC 40/PT 63337
• Current Stage: PPUB - Publication issued
• Start Date: 01-Mar-2024
• Completion Date: 16-Feb-2024

Standards Content (Sample)

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
...