This part is a kind of semiconductor called D1933.

Function of this product has 2SD1933.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Transistors 2SB1474 / 2SB1342 2SD1933 (94S-181-B400) (94L-906-D400) 298 [ ... ]

D1933 PDF Datasheet Download