This part is a kind of semiconductor called B1156.

Function of this product has Silicon PNP epitaxial planar type(For power switching).

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

Power Transistors 2SB1156 Silicon PNP epitaxial planar type For power switching Complementary to 2SD1707 Unit: mm s Features q q q q 16.2±0.5 12.5 3.5 Solder Dip s Absolute Maximum Ratings Parameter Collector to base voltage Collector to emitter voltage Emitter to base voltage Peak collector current Collector current Collector power TC=25°C dissipation Ta=25°C Junction temperature Storage temperature Symbol VCBO VCEO VEBO ICP IC PC Tj Tstg (TC=25˚C) Ratings –130 –80 –7 –30 –20 100 3 150 –55 to +150 Unit V V V A A W ˚C ˚C 21.0±0.5 15.0±0.2 Low collector to emitter saturation voltage VCE(sat) Satisfactory linearity of foward current transfer ratio hFE Large collector current IC Full-pack package which can be installed to the heat sink with one screw 0.7 15.0±0.3 [ ... ]

B1156 PDF Datasheet Download