The Si4160DY from Vishay is a MOSFET with Continous Drain Current 25.4 A, Drain Source Resistance 4 to 6.3 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.4 V. Tags: Surface Mount. More details for Si4160DY can be seen below.