I.S. 531:1991

FOREWORD
PREFACE
SECTION 1 - GENERAL
1.1 Scope
1.2 Related documents
1.3 Information to be given in a detail
     specification
1.4 Terminology
1.5 Marking
SECTION 2 - PREFERRED RATINGS AND CHARACTERISTICS
2.1 Preferred climatic categories
2.2 Preferred values of ratings
SECTION 3 - QUALITY ASSESSMENT PROCEDURES
3.1 Primary stage of manufacture
3.2 Structurally similar components
3.3 Certified test records
3.4 Qualification approval
3.5 Quality conformance inspection
SECTION 4 - TEST AND MEASUREMENT PROCEDURES
4.1 Preliminary drying
4.2 Measuring conditions
4.3 Mounting
4.4 Visual examination and check of dimensions
4.5 Electrical tests
4.6 Resistance to soldering heat
4.7 Solderability
4.8 Shear test
4.9 Substrate bending test
4.10 Rapid change of temperature
4.11 Climatic sequence
4.12 Damp heat, steady state
4.13 Characteristics at high and low temperature
4.14 Surge voltage
4.15 Endurance
4.16 Reverse voltage
4.17 Component solvent resistance
4.18 Solvent resistance of the marking
ANNEX A: Test schedule for Qualification Approval

Applicable to tantalum solid electrolyte surface mounting capacitors.