The Si4151DY from Vishay is a MOSFET with Continous Drain Current -20.5 A, Drain Source Resistance 6.25 to 13 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -25 to 25 V, Gate Source Threshold Voltage -1 to -2.5 V. Tags: Surface Mount. More details for Si4151DY can be seen below.