The IXTA4N65X2 from Littelfuse is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 850 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for IXTA4N65X2 can be seen below.