This part is a kind of semiconductor called A1037.

Function of this product has 2SA1037.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Transistors 2SA1037AK / 2SA1576A / 2SA1774 / 2SA2029 / 2SA933AS General Purpose Transistor (−50V, −0.15A) 2SA1037AK / 2SA1576A / 2SA1774 / 2SA2029 / 2SA933AS !Features 1) Excellent hFE linearity. 2) Complements the 2SC2412K / 2SC4081 / 2SC4617 / 2SC5658 / 2SC1740S. !External dimensions (Units : mm) 2SA1037AK (1) 2SA1576A (1) 0.95 0.95 1.9 2.9 0.65 0.65 0.8 0.7 0.4 (3) 0.3 (2) (3) 1.25 1.6 2.8 0.15 0.15 2.1 0.2 (2) 0.8 1.1 !Structure Epitaxial planar type. PNP silicon transistor 0.3to0.6 0to0.1 0.1to0.4 Each lead has same dimensions Each lead has same dimensions ROHM : SMT3 EIAJ : SC-59 (1) Emitter (2) Base (3) Collector 0to0.1 ROHM : UMT3 EIAJ : SC-70 (1) Emitter (2) Base (3) Collector Abbreviated symbol : F ∗ Abbreviated symbol : F ∗ 2SA1774 0.2 (1) (2 [ ... ]

A1037 PDF Datasheet Download