This part is a kind of semiconductor called FFP06U20DN.
Function of this product has FAST RECOVERY POWER RECTIFIER.
Manufacturers : Fairchild Semiconductor
Image and pinout :

Some of the text within the PDF file :
< = / 62 < > 2 < < < < / 2 ( 2 / 2 $ / * 62 (# 22 /92 ° ° "# $ !%&$ %#$ ' ( ) $ * ! ! #!+ , + ° θ -. **/ * 0) 12 °3' [ ... ]
FFP06U20DN PDF Datasheet Download
