The TPN1R603PL from Toshiba is a MOSFET with Continous Drain Current 188 A, Drain Source Resistance 1.2 to 2.5 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.1 to 2.1 V. Tags: Surface Mount. More details for TPN1R603PL can be seen below.