The Si3493DDV from Vishay is a MOSFET with Continous Drain Current -8 A, Drain Source Resistance 20 to 51.1 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage -0.4 to -1 V. Tags: Surface Mount. More details for Si3493DDV can be seen below.