The BD139 is a versatile NPN Bipolar Junction Transistor (BJT) manufactured by CENTRAL SEMICONDUCTOR. With a collector-emitter voltage (Vceo) rating of 80V and a continuous collector current (Ic) of 1.5A, this transistor is well-suited for a wide range of applications, including audio amplification, switching circuits, and linear regulators. Its TO-126 package provides easy mounting and heatsinking. As an authorised distributor of CENTRAL SEMICONDUCTOR, Supreme Components International guarantees the authenticity and quality of the BD139. This transistor offers reliable performance and is a popular choice for both hobbyists and professional engineers. Consider the BD139 for your next project requiring a robust and dependable NPN transistor.