This part is a kind of semiconductor called IRFP640.

Function of this product has Power MOSFET.

Manufacturers : LTO-DMS

Image and pinout :

Some of the text within the PDF file :

IRFP640 HEXFET Dynamic dv/dt Rating Repetitive Avalanche Rated Fast switching Ease of Paralleling Simple Drive Requirements ® Power MOSFET VDSS = 200V ID = 18A RDS(ON) =0.18Ω Description Third Generation HEXFETs from International Rectifier provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness. The TO-220 package is universally preferred for all commercial-industrial applications at power dissipation levels to approximately 50watts. The low thermal resistance and low package cost of the TO-220 contribute to its wide acceptance throughout the industry. Pin1–Gate Pin2–Drain Pin3–Source Absolute Maximum Ratings Parameter Max. Units ID@TC=25 ْC Continuous Drain Current, VGS@10V ID [ ... ]

IRFP640 PDF Datasheet Download