This part is a kind of semiconductor called K2800.
Function of this product has 2SK2800.
Manufacturers : Hitachi Semiconductor
Image and pinout :

Some of the text within the PDF file :
2SK2800 Silicon N Channel MOS FET High Speed Power Switching ADE-208-513G (Z) 8th. Edition Jun 1998 Features • Low on-resistance R DS(on) = 15 mΩ typ. • High speed switching • Low drive current • 4V gate drive device can be driven from 5V source Outline TO–220AB D G 1 2 S 3 1. Gate 2. Drain (Flange) 3. Source 2SK2800 Absolute Maximum Ratings (Ta = 25°C) Item Drain to source voltage Gate to source voltage Drain current Drain peak current Body-drain diode reverse drain current Avalanche current Avalanche energy Channel dissipation Channel temperature Storage temperature Note: Symbol VDSS VGSS ID I D(pulse) I DR I AP Note 3 Note 3 Note 2 Note1 Ratings 60 ±20 40 160 40 40 137 50 150 –55 to +150 Unit V V A A A A mJ W °C °C EA [ ... ]
K2800 PDF Datasheet Download
