The TIP112 part from STMicroelectronics is a complementary power Darlington transistor with integrated freewheeling diode. It has a maximum current gain of 1000 at a collector current of 4A, a maximum collector-emitter voltage of 60V, and a maximum power dissipation of 80W. The package size is TO-218 which is the standard medium power transistor package. It is used in a variety of applications, including motor control, lighting, and amplifiers.