The MMIX1F420N10T from Littelfuse is a MOSFET with Continous Drain Current 334 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: Surface Mount. More details for MMIX1F420N10T can be seen below.