BS 6493-1.6:1984

National foreword
Committees responsible
Chapter I: General
1. Introductory note
2. Scope
Chapter II: Terminology and letter symbols
1. Types of thyristors
2. General terms
3. Terms related to ratings and characteristics
3.1 Principal voltages, anode-cathode voltages
3.2 Principal currents, anode currents, cathode
     currents
3.3 Gate characteristics
3.4 Power dissipation
3.5 Other characteristics
4. Letter symbols
Chapter III: Essential ratings and characteristics
Section One - Reverse blocking triode thyristors
1. General
2. Rating conditions
3. Voltage and current ratings (limiting values)
4. Frequency ratings (limiting values)
5. Power dissipation ratings (limiting values
6. Temperature ratings (limiting values)
7. Electrical characteristics
8. Thermal characteristics
9. Mechanical characteristics and other data
10. Application data
Section Two - Bi-directional triode thyristors (triacs)
1. General
2. Rating conditions
3. Voltage and current ratings (limiting values)
4. Frequency ratings (limiting values)
5. Power dissipation ratings (limiting values)
6. Temperature ratings (limiting values)
7. Electrical characteristics
8. Thermal characteristics
9. Mechanical characteristics and other data
10. Application data
Section Three - Ambient-rated bi-directional trigger
diode thyristors
1. Type
2. Semiconductor material
3. Polarity
4. Outline
5. Limiting values
6. Characteristics
7. Supplementary information
Chapter IV: Methods of measurement
1. Electrical characteristics
1.1 General precautions
1.2 On-state voltage
1.3 Reverse current
1.4 Latching current
1.5 Holding current
1.6 Off-state current
1.7 Gate trigger current or voltage
1.8 Gate non-trigger voltage and gate non-trigger
     current
1.9 Gate controlled delay time and turn-on time
1.10 Circuit commutated turn-off time
1.11 Critical rate of rise of off-state voltage
1.12 Critical rate of rise of commutating voltage
1.13 Recovered charge and reverse recovery time (Qr,trr)
1.14 Circuit commutated turn-off time tq of a reverse
     conducting thyristor
2. Thermal measurements
2.1 Reference-point temperature
2.2 Thermal resistance and transient thermal impedance
3. Verification of ratings (limiting values)
3.1 Non-repetitive peak reverse voltage
3.2 Non-repetitive peak off-state voltage
3.3 Surge (non-repetitive) on-state current
3.4 On-state current ratings of fast-switching
     thyristors
3.5 Critical rate of rise of on-state current
3.6 Rating and test method for "peak case non-rupture
     current"
4. Thermal cycling load test
Chapter V: Acceptance and reliability
Section One - Electrical endurance test
1. General requirements
2. Specific requirements
Appendix A - Calculation methods for time varying load
             capability
Appendix B -

Recommendations for the use of thyristors.