This part is a kind of semiconductor called C3746.

Function of this product has 2SC3746.

Manufacturers : Sanyo Semicon Device

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/ Free Datasheet http://www.datasheet4u.com/ [ ... ]

C3746 PDF Datasheet Download