The TPH4R50ANH1 from Toshiba is a MOSFET with Continous Drain Current 138 A, Drain Source Resistance 3.7 to 4.5 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for TPH4R50ANH1 can be seen below.