onsemi Single Bipolar Transistors BD138

The BD138 is a silicon PNP transistor designed for audio amplifier and driver applications in complementary circuits. It is packaged in a TO-225 case and rated for a collector-emitter voltage of 60 V, a continuous collector current of 1.5 A, and a total device dissipation of 12.5 W at TC = 25°C. The device features a DC current gain (hFE) ranging from 40 to 250 at IC = 0.15 A and VCE = 2 V, with a collector-emitter saturation voltage of up to 0.5 V at IC = 0.5 A and IB = 0.05 A. It is Pb-free, halogen-free, and RoHS compliant. Thermal resistance from junction to case is 10°C/W, and junction temperature range is -55°C to +150°C.