BS CECC 40100:1981

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
2.2.4 Limiting element voltage
2.3 Severities for environmental and overload tests
2.3.1 Drying
2.3.2 Vibration
2.3.3 Low air pressure
2.3.4 Overload
2.4 Derating curve
2.5 Information to be given in detail specifications
2.5.1 Style
2.5.2 Rated dissipation
2.5.3 Limiting element voltage
2.5.4 Isolation voltage
2.5.5 Dimensions
2.5.6 Resistance range
2.5.7 Tolerances on rated resistance
2.5.8 Climatic category
2.5.9 Vibration severity
2.5.10 Low air pressure severity
2.5.11 Limits of resistance change after 1 000 h
       endurance test
2.5.12 Temperature characteristics of resistance
2.5.13 Derating curve
2.5.14 Marking
2.5.15 Ordering information
2.5.16 Additional information (not for inspection purposes)
Section 3 - Inspection
3.1 Formation of Inspection lots
3.2 Test methods
3.3 Qualification approval
3.4 Qualification approvals for enhanced assessment
       of quality
3.5 Delayed delivery
Appendix A1 - Fixed sample size Qualification Approval
              test schedule for fixed low power non-
              wirewound resistors
Appendix A2 - Fixed sample size Qualification Approval
              test schedule for fixed low power non-
              wirewound resistors with enhanced assess-
              ment of quality

Prescribes the ratings, characteristics, inspection requirements and test severities for non-wirewound resistors with a dissipation not greater than 4.0 W.