This part is a kind of semiconductor called 2SD1383K.

Function of this product has High-gain Amplifier Transistor (-32V/ -0.3A).

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

High-gain Amplifier Transistor (32V , 0.3A) 2SD1383K Features 1) Darlington connection for high DC current gain. 2) Built-in 4k resistor between base and emitter. 3) Complements the 2SB852K. Packaging specifications Type Package hFE Marking Code Basic ordering unit (pieces) ∗ Denotes hFE 2SD1383K SMT3 B W∗ T146 3000 Dimensions (Unit : mm) 2SD1383K SOT-346 (1)Emitter (2)Base (3)Collector Each lead has same dimensions Circuit diagram C B RBE 4kΩ E : Emitter B : Base C : Collector E Absolute maximum ratings (Ta=25C) Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Collector power dissipation Junction temperature Storage temperature ∗1 RBE=0Ω ∗2 Single pulse Pw=10ms Symbol VCBO VCES VEBO IC PC Tj Tstg [ ... ]

2SD1383K PDF Datasheet Download