This part is a kind of semiconductor called 2SK2843.

Function of this product has POWER MOSFET.

Manufacturers : Suntac Electronic

Image and pinout :

Some of the text within the PDF file :

2SK2843 GENERAL DESCRIPTION FEATURES 1 2SK2843 ORDERING INFORMATION Part Number Package 2 2SK2843 TYPICAL ELECTRICAL CHARACTERISTICS 3 [ ... ]

2SK2843 PDF Datasheet Download