The MG400V2YMS3 from Toshiba is a MOSFET with Continous Drain Current 400 A, Drain Source Breakdown Voltage 1700 V, Gate Source Voltage -10 to 25 V, Gate Source Threshold Voltage 3.5 to 5.5 V, Power Dissipation 2000 W. Tags: Surface Mount. More details for MG400V2YMS3 can be seen below.