This part is a kind of semiconductor called IRF9520.

Function of this product has 6A/ 100V/ 0.600 Ohm/ P-Channel Power MOSFET.

Manufacturers : Intersil Corporation

Image and pinout :

Some of the text within the PDF file :

IRF9520 Data Sheet July 1999 File Number 2281.3 6A, 100V, 0.600 Ohm, P-Channel Power MOSFET This advanced power MOSFET is designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation. These are P-Channel enhancement mode silicon gate power field effect transistors designed for applications such as switching regulators, switching converters, motor drivers, relay drivers and drivers for high power bipolar switching transistors requiring high speed and low gate drive power. These types can be operated directly from integrated circuits. Formerly developmental type TA17501. Features • 6A, 100V • rDS(ON) = 0.600Ω • Single Pulse Avalanche Energy Rated • SOA is Power Dissipation Limited • Nanosecond Switching Speeds • Line [ ... ]

IRF9520 PDF Datasheet Download