This part is a kind of semiconductor called BC818-16.
Function of this product has NPN Silicon AF Transistors.
Manufacturers : Infineon Technologies AG
Image and pinout :
Some of the text within the PDF file :
BC817, BC818 NPN Silicon AF Transistors 3 For general AF applications High collector current High current gain Low collector-emitter saturation voltage Complementary types: BC807, BC808 (PNP) 2 1 VPS05161 Type BC817-16 BC817-25 BC817-40 BC818-16 BC818-25 BC818-40 Maximum Ratings Parameter Marking 6As 6Bs 6Cs 6Es 6Fs 6Gs 1=B 1=B 1=B 1=B 1=B 1=B Pin Configuration 2=E 2=E 2=E 2=E 2=E 2=E 3=C 3=C 3=C 3=C 3=C 3=C Package SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 Symbol VCEO VCBO VEBO BC817 45 50 5 500 1 100 200 330 150 BC818 25 30 5 Unit V Collector-emitter voltage Collector-base voltage Emitter-base voltage DC collector current Peak collector current Base current Peak base current Total power dissipation, TS = 79 °C Junction temperature Storage temperature IC ICM IB IBM Ptot [ ... ]