The IXTA3N120HV from Littelfuse is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 4500 Milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.5 to 5 V. Tags: Surface Mount. More details for IXTA3N120HV can be seen below.