This part is a kind of semiconductor called BC338-25.

Function of this product has Amplifier Transistors(NPN Silicon).

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

BC337, BC337−16, BC337−25, BC337−40, BC338−25 Amplifier Transistors NPN Silicon http://onsemi.com Features COLLECTOR 1 2 BASE Symbol VCEO VCBO VEBO IC PD 625 5.0 PD 1.5 12 TJ, Tstg −55 to +150 BC337 45 50 5.0 800 BC338 25 30 Unit Vdc Vdc Vdc mAdc mW mW/°C W mW/°C • Pb−Free Package is Available* 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 3 EMITTER MARKING DIAGRAM BC33 xxxx YWW °C THERMAL CHARACTERISTICS Characteristic Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Ca [ ... ]

BC338-25 PDF Datasheet Download