The Si3437DV from Vishay is a MOSFET with Continous Drain Current 1.4 A, Drain Source Resistance 61 to 79 milliohm, Drain Source Breakdown Voltage -150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -2 to -4 V. Tags: Surface Mount. More details for Si3437DV can be seen below.