2N6300 Temperature-Power Derating Curve [2N6301]
NPN Medium Power Switching Transistor. Package, TO-66 Metal Can.
2N6300 Derating Curve, Maximum Operation
Use the Graph to determine how much to derate power [wattage] based on operational case temperature [in still air]. Transistor Derating Curves
The above chart details the maximum allowable power dissipation with increasing ambient temperature. Maximum operational power dissipation is achievable at 250C. However above 25C the maximum package dissipation, or power, must be reduce to insure that the devices junction temperature remains constant. The higher the ambient temperature is increased the lower the allowable power dissipation, as depicted in the curves.
Decreasing a devices operational limits as temperature is increased is called derating, in this case derating a devices operational power dissipation vs increasing ambient temperature.
Refer to MIL-PRF-19500/539D; Semiconductor Device, Transistor, NPN, Silicon Power, Types 2N6300 and 2N6301, JAN, JANTX, and JANTXV, [TO-66]
Case mount. A type of package which provides a method of readily attaching one surface of the semiconductor device to a heat dissipater to achieve thermal management of the case temperature (example: TO-66). The Collector of this device is directly connected to the case or body of the metal package. [Derating Definitions, bottom of page]
2N6300 Schematic
How to Derate; Guideline for Derating Electronic Components
