This part is a kind of semiconductor called BD436.

Function of this product has (BD438) EPITAXIAL SILICON POWER TRANSISTORS.

Manufacturers : TRANSYS Electronics

Image and pinout :

Some of the text within the PDF file :

Transys Electronics L I M I T E D EPITAXIAL SILICON POWER TRANSISTORS BD433 BD435 BD437 BD439 BD441 NPN BD434 BD436 BD438 BD440 BD442 PNP EC B TO126 Plastic Package Intended for use in Medium Power Linear and Switching Applications ABSOLUTE MAXIMUM RATINGS DESCRIPTION SYMBOL Collector Base Voltage Collector Emitter Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Base Current Total Dissipation @ TC=25ºC Total Dissipation @ Ta=25ºC Derate above 25ºC Operating and Storage Junction Temperature Range THERMAL RESISTANCE Junction to Case Junction to Ambient in free air Rth (j-c) Rth (j-a) 3.5 100 ºC/W ºC/W VCBO VCES VCEO VEBO IC IB PD PD BD433 BD434 22 22 22 BD435 BD436 32 32 32 BD437 BD438 45 45 45 5.0 4.0 7.0 1.0 36.0 1.25 10 - 65 to 150 [ ... ]

BD436 PDF Datasheet Download