This part is a kind of semiconductor called BC877.

Function of this product has NPN Silicon Darlington Transistors (High current gain Low collector-emitter saturation voltage.

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

NPN Silicon Darlington Transistors BC 875 … BC 879 High current gain q Low collector-emitter saturation voltage q Complementary types: BC 876, BC 878 BC 880 (PNP) q 2 3 1 Type BC 875 BC 877 BC 879 Marking – Ordering Code C62702-C853 C62702-C854 C62702-C855 Pin Configuration 1 2 3 E C B Package1) TO-92 Maximum Ratings Parameter Collector-emitter voltage Collector-base voltage Emitter-base voltage Collector current Peak collector current Base current Peak base current Total power dissipation, TC = 90 ˚C2) Junction temperature Storage temperature range Thermal Resistance Junction - ambient2) Junction - case3) 1) 2) Symbol BC 875 VCE0 VCB0 VEB0 IC ICM IB IBM Ptot Tj Tstg 45 60 Values BC 877 60 80 5 1 2 100 200 0.8 (1) 150 Unit BC 879 80 100 A mA W ˚C V – 65 … + 150 Rth J [ ... ]

BC877 PDF Datasheet Download