This part is a kind of semiconductor called BD536.

Function of this product has Medium Power Linear and Switching Applications.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

BD534/536/538 BD534/536/538 Medium Power Linear and Switching Applications • Low Saturation Voltage • Complement to BD533, BD535 and BD537 respectively 1 TO-220 2.Collector 3.Emitter 1.Base PNP Epitaxial Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCBO Parameter Collector-Base Voltage : BD534 : BD536 : BD538 : BD534 : BD536 : BD538 Value - 45 - 60 - 80 - 45 - 60 - 80 -5 -8 -1 50 150 - 65 ~ 150 Units V V V V V V V A A W °C °C VCEO Collector-Emitter Voltage VEBO IC IB PC TJ TSTG Emitter-Base Voltage Collector Current (DC) Base Current Collector Dissipation (TC=25°C) Junction Temperature Storage Temperature Electrical Characteristics TC=25°C unless otherwise noted Symbol ICBO Parameter Collector Cut-off Current : BD534 : BD536 : BD538 : [ ... ]

BD536 PDF Datasheet Download