The IXFN170N65X2 from Littelfuse is a MOSFET with Continous Drain Current 170 A, Drain Source Resistance 13 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3.5 to 5 V. Tags: Chassis Mount. More details for IXFN170N65X2 can be seen below.