The TKR74F04PB from Toshiba is a MOSFET with Continous Drain Current 250 A, Drain Source Resistance 0.6 to 9.8 Milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 3 V. Tags: Surface Mount. More details for TKR74F04PB can be seen below.