The Si7431DP from Vishay is a MOSFET with Continous Drain Current 3.8 A, Drain Source Resistance 145 to 180 Milliohm, Drain Source Breakdown Voltage -200 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -4 to -2 V. Tags: Surface Mount. More details for Si7431DP can be seen below.