This part is a kind of semiconductor called 3DD102A.

Function of this product has (3DD101 / 3DD102) NPN.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

Free Datasheet http:// Free Datasheet http:// Free Datasheet http:// Free Datasheet http:// Free Datasheet http:// [ ... ]

3DD102A PDF Datasheet Download