This part is a kind of semiconductor called MJ1000.

Function of this product has Medium-Power Complementary Silicon Transistors.

Manufacturers : Motorola Inc

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MJ1000/D Medium-Power Complementary Silicon Transistors . . . for use as output devices in complementary general purpose amplifier applications. • High DC Current Gain hFE = 6000 (Typ) @ IC = 3.0 Adc • Monolithic Construction with Built–in Base–Emitter Shunt Resistors MJ1000 MJ1001* *Motorola Preferred Device NPN 10 AMPERE DARLINGTON POWER TRANSISTORS COMPLEMENTARY SILICON 60 – 80 VOLTS 90 WATTS ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ [ ... ]

MJ1000 PDF Datasheet Download