The IXFH40N85X from Littelfuse is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 145 Milliohm, Drain Source Breakdown Voltage 850 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3.5 to 5.5 V. Tags: Through Hole. More details for IXFH40N85X can be seen below.