This part is a kind of semiconductor called BC450.

Function of this product has High Voltage Transistors.

Manufacturers : Motorola Inc

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by BC450/D High Voltage Transistors PNP Silicon COLLECTOR 1 BC450,A 2 BASE 3 EMITTER MAXIMUM RATINGS Rating Symbol Value Unit Collector – Emitter Voltage Collector – Base Voltage Emitter – Base Voltage Collector Current Continuous Total Device Dissipation @ TA = 25°C Derate above 25°C VCEO VCBO VEBO IC PD –100 –100 –5.0 –300 625 5.0 Vdc Vdc Vdc mAdc mW mW/°C Total Device Dissipation @ TC = 25°C PD 1.5 Watt Derate above 25°C 12 mW/°C Operating and Storage Junction Temperature Range TJ, Tstg – 55 to +150 °C THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Thermal Resistance, Junction to Ambient RqJA 200 °C/W Thermal Resistance, Junction to Case RqJC 83.3 °C/W ELECTRICAL [ ... ]

BC450 PDF Datasheet Download