The MG800FXF2YMS3 from Toshiba is a MOSFET with Continous Drain Current 800 A, Drain Source Breakdown Voltage 3300 V, Gate Source Voltage -10 to 25 V, Gate Source Threshold Voltage 4.8 V, Power Dissipation 4680 W. Tags: Surface Mount. More details for MG800FXF2YMS3 can be seen below.