The TK1R5R04PB from Toshiba is a MOSFET with Continous Drain Current 160 A, Drain Source Resistance 1.25 to 2.05 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 TK1R5R04PB can be seen below.