This part is a kind of semiconductor called 1N3009.

Function of this product has (1N3000 - 1N3015) 10W Zener Diodes.

Manufacturers : America Semiconductor

Image and pinout :

Some of the text within the PDF file :

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

1N3009 PDF Datasheet Download