The Si7309DN from Vishay is a MOSFET with Continous Drain Current 8 A, Drain Source Resistance 92 to 146 Milliohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Surface Mount. More details for Si7309DN can be seen below.