The FF6MR12KM1 from Infineon Technologies is a MOSFET with Continous Drain Current 250 A, Drain Source Resistance 5.81 to 8.5 milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -10 to 20 V, Gate Source Threshold Voltage 3.45 to 5.15 V. Tags: Chassis Mount. More details for FF6MR12KM1 can be seen below.