BS CECC 40400:1990

Foreword
Preface
Section 1: Scope
Section 2: Preferred characteristics, ratings and
            severities for environmental and overload
            tests
2.1 Characteristics
2.1.1 Climatic severities
2.1.2 Temperature characteristics and temperature
        coefficients of resistance
2.1.3 Limits for change in resistance
2.1.4 Limits for insulation resistance
2.2 Ratings
2.2.1 Rated resistance
2.2.2 Tolerances on rated resistance
2.2.3 Rated dissipation (in the mounted state)
2.2.4 Limiting element voltage
2.3 Severities for environmental and overload tests
2.3.1 Drying
2.3.2 Overload (in the mounted condition)
2.4 Derating curve (in the mounted condition)
2.5 Information to be specified in the detail
        specification
2.5.1 Style and dimensions
2.5.2 Rated dissipation
2.5.3 Limiting element voltage
2.5.4 Resistance range
2.5.5 Tolerances on rated resistance
2.5.6 Climatic category
2.5.7 Limits of resistance change after 1000 h
        endurance test
2.5.8 Temperature characteristic of resistance
2.5.9 Derating curve
2.5.10 Marking
2.5.11 Ordering information
2.5.12 Additional information (not for inspection
        purposes)
Section 3: Inspection
3.1 Formation of inspection lots
3.2 Test methods
3.3 Qualification approval
Annex
A Fixed sample size Qualification Approval test
        schedule for fixed low power surface mounting
        (chip) resistors

Preferred values for characteristics and ratings and the inspection requirements for fixed surface mounting resistors of assessed quality.