The BDX53B and BDX53C are silicon Epitaxial-Base NPN power transistors in monolithic Darlington configuration mounted in Jedec TO-220 plastic package.
They are intended for use in hammer drivers, audio amplifiers, and other medium power linear and switching applications.
The complementary PNP types are BDX54B and BDX54C.
The transistors have absolute maximum ratings for collector-base voltage, collector-emitter voltage, emitter-base voltage, collector current, and other parameters.
The electrical characteristics include collector cut-off current, collector-emitter saturation voltage, base-emitter saturation voltage, DC current gain, and other parameters.
The transistors have a safe operating area and a derating curve.
The mechanical data and thermal data are also provided.
The publication also includes a disclaimer from STMicroelectronics and information about the company.