The IXFH54N65X3 from Littelfuse is a MOSFET with Continous Drain Current 54 A, Drain Source Resistance 59 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3.2 to 5.2 V. Tags: Through Hole. More details for IXFH54N65X3 can be seen below.