The IRF9640S from Vishay is a MOSFET with Continous Drain Current -11 A, Drain Source Resistance 500 milliohm, Drain Source Breakdown Voltage -200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2 to -4 V. Tags: Surface Mount. More details for IRF9640S can be seen below.