The Si7439DP from Vishay is a MOSFET with Continous Drain Current -3 A, Drain Source Resistance 73 to 95 Milliohm, Drain Source Breakdown Voltage -150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -4 to -2 V. Tags: Surface Mount. More details for Si7439DP can be seen below.