This part is a kind of semiconductor called IRF9640.

Function of this product has 11A/ 200V/ 0.500 Ohm/ P-Channel Power MOSFETs.

Manufacturers : Intersil Corporation

Image and pinout :

Some of the text within the PDF file :

IRF9640, RF1S9640SM Data Sheet July 1999 File Number 2284.2 11A, 200V, 0.500 Ohm, P-Channel Power MOSFETs These are P-Channel enhancement mode silicon-gate power field-effect transistors. They are advanced power MOSFETs designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation. All of these power MOSFETs are designed for applications such as switching regulators, switching converters, motor drivers, relay drivers and as drivers for other high-power switching devices. The high input impedance allows these types to be operated directly from integrated circuits. Formerly developmental type TA17522. Features • 11A, 200V • rDS(ON) = 0.500Ω • Single Pulse Avalanche Energy Rated • SOA is Power Dissipation Limited • Nanos [ ... ]

IRF9640 PDF Datasheet Download