This part is a kind of semiconductor called D1944.
Function of this product has 2SD1944.
Manufacturers : Rohm
Image and pinout :

Some of the text within the PDF file :
Free Datasheet http://www.datasheet4u.com/ Free Datasheet http://www.datasheet4u.com/ Free Datasheet http://www.datasheet4u.com/ [ ... ]
D1944 PDF Datasheet Download
