2N4033UA Temperature-Power Derating Curve [2N4029]
PNP Switching Transistor. Package, UA Surface Mount [TO-39, TO-18].
2N4033 Applications; High-speed switching
2N4033UA Transistor Temperature Derating Curves
The chart details the maximum allowable power dissipation with increasing ambient temperature for a Surface Mount 2N4033UA transistor. Maximum operational power dissipation is achievable at 25C. However above 25C the maximum package dissipation must be reduce to insure that the devices junction temperature remains constant. Decreasing a components operational limits as temperature is increased is called derating. Note that the maximum operation temperature is 2000C in free air.
Adding a Fan to provide air movement [or cool air] will allow the 2N4033 to operate to a higher temperature, as long as the temperature seen by the device is held below 200C.
Refer to MIL-PRF-19500/512H; Semiconductor Device, Transistor, PNP, Silicon, Switching, Types 2N4029, 2N4033, 2N4033UA, 2N4033UB, JAN, JANTX, JANTXV, JANS, JANKC2N4033, and JANHC2N4033, [UA Package]
2N4033 Maximum Ratings:
Collector Emitter Voltage = 80 volts
Collector Base Voltage = 80 volts
Emitter Base Voltage = 5 volts
Collector Current = 1 amp
Power Dissipation 250C = 400mW
Operating Temperature = -65 to +2000C [Maximum operational temperature]
Storage Temperature = -65 to +2000C
UA Case Surface Mount Package Schematic and pinout
