The Si4497DY from Vishay is a MOSFET with Continous Drain Current -36 A, Drain Source Resistance 2 to 4 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to -2.5 V. Tags: Surface Mount. More details for Si4497DY can be seen below.