This part is a kind of semiconductor called SSH6N80.

Function of this product has (SSH6N70 / SSH6N80) N-Channel Power MOSFETs.

Manufacturers : Samsung Electronics

Image and pinout :

Some of the text within the PDF file :

Features

1. Lower Rds(on)

2. Improved inductive reggedness
3. Fast switching times

4. Rugged polysilicon gate cell structures
5. Lower input capacitance
6. Extended safe operating area
7. Improved high temperature reliability

BVdss = 800V, Rds(on) = 1.9 Ohm, Id = 6.0A

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SSH6N80 PDF Datasheet Download