The Si2356DS from Vishay is a MOSFET with Continous Drain Current 4.3 A, Drain Source Resistance 42 to 70 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.6 to 1.5 V. Tags: Surface Mount. More details for Si2356DS can be seen below.