The IRF9540 from Vishay is a MOSFET with Continous Drain Current -19 A, Drain Source Resistance 200 milliohm, Drain Source Breakdown Voltage -100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2 to -4 V. Tags: Through Hole. More details for IRF9540 can be seen below.