The IXFN170N30P from Littelfuse is a MOSFET with Continous Drain Current 138 A, Drain Source Resistance 18 Milliohm, Drain Source Breakdown Voltage 300 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 4.5 V. Tags: Chassis Mount. More details for IXFN170N30P can be seen below.