The TPW2R508NH from Toshiba is a MOSFET with Continous Drain Current 170 A, Drain Source Resistance 2 to 2.5 milliohm, Drain Source Breakdown Voltage 75 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for TPW2R508NH can be seen below.