This part is a kind of semiconductor called BC337.

Function of this product has Amplifier Transistors.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

BC337, BC337-25, BC337-40 Amplifier Transistors NPN Silicon Features • These are Pb−Free Devices 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 Symbol VCEO VCBO VEBO IC PD Value 45 50 5.0 800 625 5.0 Unit Vdc Vdc Vdc mAdc mW mW/°C Total Device Dissipation @ TC = 25°C Derate above 25°C PD 1.5 W 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 Stresses exceeding those listed in the Maximum Ratings table may damage [ ... ]

BC337 PDF Datasheet Download