This part is a kind of semiconductor called BC548C.

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

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

BC546B, BC547A, B, C, BC548B, C Amplifier Transistors NPN Silicon Features http://onsemi.com • Pb−Free Packages are Available* COLLECTOR 1 MAXIMUM RATINGS Rating Collector - Emitter Voltage BC546 BC547 BC548 Collector - Base Voltage BC546 BC547 BC548 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 VEBO IC PD PD TJ, Tstg VCBO 80 50 30 6.0 100 625 5.0 1.5 12 −55 to +150 Vdc mAdc mW mW/°C W mW/°C °C 1 2 3 Symbol VCEO 65 45 30 Vdc Value Unit Vdc 2 BASE 3 EMITTER TO−92 CASE 29 STYLE 17 MARKING DIAGRAM THERMAL CHARACTERISTICS Characteristic Thermal Resistance, Junction−to−Ambient Therm [ ... ]

BC548C PDF Datasheet Download