This part is a kind of semiconductor called SM7580NSF.

Function of this product has N-Channel Enhancement Mode MOSFET.

Manufacturers : Sinopower

Image and pinout :

Some of the text within the PDF file :

SM7580NSF Features · 80V/83A, RDS(ON)=9.6mW (max.) @ VGS=10V · Reliable and Rugged · Lead Free and Green Devices Available (RoHS Compliant) ® N-Channel Enhancement Mode MOSFET Pin Description GDS Top View of TO-220 D Applications · Switching Application G S N-Channel MOSFET Ordering and Marking Information SM7580NS Assembly Material Handling Code Temperature Range Package Code Package Code F : TO-220 Operating Junction Temperature Range C : -55 to 150 oC Handling Code TU : Tube (50ea/tube) Assembly Material G : Halogen and Lead Free Device SM7580NS F : SM7580N XXXXX XXXXX - Lot Code Note: SINOPOWER lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully compliant with RoHS. SINOPOWER lead-free products me [ ... ]

SM7580NSF PDF Datasheet Download