This part is a kind of semiconductor called BCX68-16.

Function of this product has NPN Silicon AF Transistors.

Manufacturers : Infineon Technologies AG

Image and pinout :

Some of the text within the PDF file :

BCX68 NPN Silicon AF Transistors
For general AF applications
High collector current
High current gain
Low collector-emitter saturation voltage
Complementary type: BCX69 (PNP) 1 2 3 2 VPS05162 Type BCX68 BCX68-10 BCX68-16 BCX68-25 Maximum Ratings Parameter Marking CA CB CC CD 1=B 1=B 1=B 1=B Pin Configuration 2=C 2=C 2=C 2=C 3=E 3=E 3=E 3=E Package SOT89 SOT89 SOT89 SOT89 Symbol VCEO VCBO VEBO Values 20 25 5 1 2 100 200 1 150 -65 ... 150 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 = 130 °C Junction temperature Storage temperature Thermal Resistance IC ICM IB IBM Ptot Tj Tstg A mA W °C Junction - soldering point 1) RthJS
20 K/W [ ... ]

BCX68-16 PDF Datasheet Download