The Si3438DV from Vishay is a MOSFET with Continous Drain Current 7.4 A, Drain Source Resistance 29.5 to 42.5 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.4 to 3 V. Tags: Surface Mount. More details for Si3438DV can be seen below.