The Si4564DY from Vishay is a MOSFET with Continous Drain Current 9.2 A, Drain Source Resistance 14.5 to 28 milliohm, Drain Source Breakdown Voltage -40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1.2 to 2 V. Tags: Surface Mount. More details for Si4564DY can be seen below.