The TPHR8504PL from Toshiba is a MOSFET with Continous Drain Current 340 A, Drain Source Resistance 0.7 to 1.4 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.4 to 2.4 V. Tags: Surface Mount. More details for TPHR8504PL can be seen below.