The Si7139DP from Vishay is a MOSFET with Continous Drain Current 40 A, Drain Source Resistance 4.2 to 9 Milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2.5 to -1.2 V. Tags: Surface Mount. More details for Si7139DP can be seen below.