The IXFX420N10T from Littelfuse is a MOSFET with Continous Drain Current 420 A, Drain Source Resistance 2.6 Milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 5 V. Tags: Through Hole. More details for IXFX420N10T can be seen below.