2N4237 Temperature-Power Derating Curve [2N4238, 2N4239]
NPN Low Power Transistor. Package, TO-39.
2N3437 Applications; General Purpose Amplifiers [GP Amps]
2N4237 Temperature-Power Derating Curve
Use the Graph to determine power dissipation based on operational ambient temperature. Attaching a heat sink to the metal can will allow the device to operate at a higher temperature with out the need to reduce power consumption. The graph provides maximum power dissipation in still air at the ambient temperature indicated.
Transistor Derating Curves
Temperature derating is a standard design practice for electrical engineers.
Refer to MIL-PRF-19500/581B; Semiconductor Device, Transistor, NPN, Silicon, Amplifier Types: 2N4237, 2N4238, AND 2N4239, JAN, JANTX, AND JANTXV, [TO-39, TO-205AD]
2N4237 Maximum Ratings:
Collector Emitter Voltage = 40 volts dc [Vceo]
Collector Base Voltage = 50 volts dc [Vcbo]
Emitter Base Voltage = 6 volts dc [Vebo]
Power Dissipation = 1 Watt, 250C [Ta, ambient temperature]
Power Dissipation = 6.0 Watt, 250C [Tc, case temperature]
Operating Junction Temperature = -65 to +2000C [Tj]
Storage Temperature = -65 to +2000C [Tstg]
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Complementary Device; 2N4234 PNP Transistor
How to Derate; Guideline for Derating Electronic Components
