The IRFPF40 from Vishay is a MOSFET with Continous Drain Current 4.7 A, Drain Source Resistance 2500 milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for IRFPF40 can be seen below.