This part is a kind of semiconductor called A1371.
Function of this product has 2SA1371.
Manufacturers : Sanyo Semicon Device
Image and pinout :

Some of the text within the PDF file :
Free Datasheet http://www.net/ Free Datasheet http://www.net/ Free Datasheet http://www.net/ Free Datasheet http://www.net/ [ ... ]
A1371 PDF Datasheet Download
