This part is a kind of semiconductor called BC848BLT1.

Function of this product has General Purpose Transistors(NPN Silicon).

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

BC846ALT1 Series BC846, BC847 and BC848 are Preferred Devices General Purpose Transistors NPN Silicon Features http://onsemi.com COLLECTOR 3 1 BASE Symbol VCEO 65 45 30 VCBO 80 50 30 VEBO BC846 BC847, BC850 BC848, BC849 Collector Current − Continuous IC 6.0 6.0 5.0 100 mAdc Vdc Vdc 1 2 • Pb−Free Packages are Available • Moisture Sensitivity Level: 1 • ESD Rating − Human Body Model: >4000 V ESD Rating − Machine Model: >400 V MAXIMUM RATINGS Rating Collector-Emitter Voltage BC846 BC847, BC850 BC848, BC849 Collector−Base Voltage BC846 BC847, BC850 BC848, BC849 Emitter−Base Voltage Value Unit Vdc 2 EMITTER 3 SOT−23 CASE 318 STYLE 6 Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are indi [ ... ]

BC848BLT1 PDF Datasheet Download