This part is a kind of semiconductor called BC450.

Function of this product has HIGH VOLTAGE TRANSISTORS.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

MAXIMUM RATINGS Rating Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous @Total Device Dissipation Ta = 25°C Derate above 25°C @Total Device Dissipation Tc = 25°C Derate above 25 °C Operating and Storage Junction Temperature Range THERMAL CHARACTERISTICS Characteristic Thermal Resistance, Junction to Case Thermal Resistance, Junction to Ambient Symbol VCEO VCBO VEBO ic PD pd Tj. T st g Symbol RtfjC Rwc BC BC BC 446 448 450 60 80 100 60 80 100 5.0 300 625 5.0 1.5 12 -55 to +150 Max 83.3 200 Unit Vdc Vdc Vdc mAdc mW mW/°C Watt mW/°C °C Unit °C/W °C/W BC446 BC448 BC450 CASE 29-02, STYLE 17 TO-92 (TO-226AA) HIGH VOLTAGE TRANSISTORS PNP SILICON Refer to MPS8598 for graphs. ELECTRICAL CHARACTERISTICS (Ta = 25 °C unless otherw [ ... ]

BC450 PDF Datasheet Download