The IXFN44N80Q3 from Littelfuse is a MOSFET with Continous Drain Current 37 A, Drain Source Resistance 190 Milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3.5 to 6.5 V. Tags: Chassis Mount. More details for IXFN44N80Q3 can be seen below.