This part is a kind of semiconductor called 2SA1952.

Function of this product has High-speed Switching Transistor (−60V/ −5A).

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

2SA1952 Transistors High-speed Switching Transistor (−60V, −5A) 2SA1952 zFeatures 1) High speed switching. (tf : Typ. 0.15 µs at IC = −3A) 2) Low VCE(sat). (Typ. −0.2V at IC/IB = −3/−0.15A) 3) Wide SOA. (safe operating area) 4) Complements the 2SC5103. zExternal dimensions (Units : mm) 2SA1952 (1) 0.9 0.75 5.5 1.5 2.3 5.1 0.9 (3) (2) 2.3 0.65 zAbsolute maximum ratings (Ta = 25°C) Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector power dissipation Junction temperature Storage temperature Symbol VCBO VCEO VEBO IC PC Tj Tstg Limits −100 −60 −5 −5 −10 1 10 150 −55~+150 Unit V V V A A(Pulse) W W(Tc=25°C) °C °C 1.0 0.8Min. C0.5 0.5 0.5 1.5 2.5 9.5 2.3 ROHM : CPT3 EIAJ : SC-63 zPackaging specific [ ... ]

2SA1952 PDF Datasheet Download