The IXTT440N04T4HV from Littelfuse is a MOSFET with Continous Drain Current 440 A, Drain Source Resistance 1.25 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -15 to 15 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for IXTT440N04T4HV can be seen below.