This part is a kind of semiconductor called 2SA1038S.

Function of this product has High-voltage Amplifier Transistor (−120V/ −50mA).

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

2SA1579 / 2SA1514K / 2SA1038S Transistors High-voltage Amplifier Transistor (−120V, −50mA) 2SA1579 / 2SA1514K / 2SA1038S zFeatures 1) High breakdown voltage. (BVCEO = −120V) 2) Complements the 2SC4102 / 2SC3906K / 2SC2389S. zExternal dimensions (Unit : mm) 2SA1579 (1) 0.65 0.65 0.7 0.8 0.3 (3) 1.25 2.1 0.15 0.2 (2) 0.1Min. 0~0.1 Each lead has same dimensions ROHM : UMT3 EIAJ : SC-70 JEDEC : SOT-323 2SA1514K (1) 0.4 (3) 1.6 2.8 0.15 0.3Min. 0 to 0.1 Each lead has same dimensions ROHM : SMT3 EIAJ : SC-59 JEDEC : SOT-346 (1) Emitter (2) Base (3) Collector 2SA1038S 3 4 2 (15Min.) 3Min. 0.45 2.5 5 (1) (2) (3) 0.5 0.45 Taping specifications ROHM : SPT EIAJ : SC-72 (1) Emitter (2) Collector (3) Base 1.1 0.95 0.95 1.9 2.9 (2) 0.9 1.3 (1) Emitter (2) Base ( [ ... ]

2SA1038S PDF Datasheet Download