This part is a kind of semiconductor called K2651-01MR.

Function of this product has 2SK2651-01MR.

Manufacturers : Fuji Electric

Image and pinout :

Some of the text within the PDF file :

2SK2651-01MR FAP-IIS Series > Features High Speed Switching Low On-Resistance No Secondary Breakdown Low Driving Power High Voltage VGS = ± 30V Guarantee Repetitive Avalanche Rated N-channel MOS-FET 900V 2,5Ω 6A 50W > Outline Drawing > Applications Switching Regulators UPS DC-DC converters General Purpose Power Amplifier > Maximum Ratings and Characteristics - Absolute Maximum Ratings T( C=25°C), unless otherwise specified > Equivalent Circuit Rating 900 6 24 ±30 6 71,9 50 150 -55 ~ +150 Unit V A A V A mJ W °C °C Item Drain-Source-Voltage Continous Drain Current Pulsed Drain Current Gate-Source-Voltage Repetitive or Non-Repetitive (Tch ≤ 150°C) Avalanche Energy Max. Power Dissipation Operating and Storage Temperature Range Symbol V DS ID I D(puls) V [ ... ]

K2651-01MR PDF Datasheet Download