The BT150S-600R,118 is a NXP Bipolar Transistor part rated at 600V, 15A and is designed for switching applications. It is a TO-220AB Transistor, made of a Si planar base, a PN junction collector, and an emitter of NPN type. It features high collector-to-base voltage, a high voltage current gain, and good reliability levels. It is designed to be used in a variety of applications, including power supplies, converters, switching regulators and drives, rectifiers and circuits, and audio systems.