The Si4816BDY from Vishay is a MOSFET with Continous Drain Current 11.4 A, Drain Source Resistance 13 to 22.5 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for Si4816BDY can be seen below.