2N3743 Temperature-Power Derating Curve [2N4930, 2N4931]
PNP Silicon High Voltage Transistor. Package, TO-39 Metal Can [Through-Hole].
2N3743 Transistor Operational Power Derating Curve
Use the Graph to determine how much to derate power [wattage] based on ambient operational temperature. Additional Transistor Derating Curves
Temperature derating is a standard design practice for electrical engineers.
Refer to MIL-PRF-19500/397H; Semiconductor Transistor, PNP, Silicon, Types 2N3743, 2N3743U4, 2N4930, 2N4930U4, 2N4931, and 2N4931U4, JAN, JANTX, JANTXV, JANS, JANHC, and JANKC, [TO-39, U4 surface mount, Semiconductor-Die]
2N3743 Maximum Operational Ratings:
Collector Emitter Voltage = 300 volts dc
Collector Base Voltage = 300 volts dc
Emitter Base Voltage = 5 volts dc
Power Dissipation 250C = 1 Watt
Operating Temperature = -65 to +2000C
Listing of Transistor Manufacturers and vendors.
How to Derate; Guideline for Derating Electronic Components
