This part is a kind of semiconductor called B950.

Function of this product has 2SB950.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

Power Transistors 2SB950, 2SB950A Silicon PNP epitaxial planar type Darlington 4.2±0.2 For power amplification and switching Complementary to 2SD1276 and 2SD1276A 0.7±0.1 10.0±0.2 5.5±0.2 2.7±0.2 4.2±0.2 Unit: mm 7.5±0.2 s Features q q q High foward current transfer ratio hFE High-speed switching Full-pack package which can be installed to the heat sink with one screw (TC=25˚C) Ratings –60 –80 –60 –80 –5 –8 –4 40 2 150 –55 to +150 Unit V 16.7±0.3 φ3.1±0.1 4.0 14.0±0.5 s Absolute Maximum Ratings Parameter Collector to base voltage Collector to 2SB950 2SB950A 2SB950 Symbol VCBO VCEO VEBO ICP IC PC Tj Tstg 1.4±0.1 1.3±0.2 Solder Dip 0.8±0.1 0.5 –0.1 +0.2 2.54±0.25 5.08±0.5 1 2 emitter voltage 2SB950A Emitter to base voltage Peak collect [ ... ]

B950 PDF Datasheet Download