This part is a kind of semiconductor called P53N05.
Function of this product has STP53N05.
Manufacturers : ST Microelectronics
Image and pinout :

Some of the text within the PDF file :
w w a D . w S a t e e h U 4 t m o .c w w w .D a t a e h S t e U 4 .c m o w w w a .D S a t e e h U 4 t m o .c [ ... ]
P53N05 PDF Datasheet Download
