The IXFH40N80XA from Littelfuse is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 145 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3.5 to 5.5 V. Tags: Through Hole. More details for IXFH40N80XA can be seen below.