The IXTP120N20X4 from Littelfuse is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 9.5 Milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 4.5 V. Tags: Through Hole. More details for IXTP120N20X4 can be seen below.