The Si4634DY from Vishay is a MOSFET with Continous Drain Current 24.5 A, Drain Source Resistance 4.3 to 6.7 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.4 to 2.6 V. Tags: Surface Mount. More details for Si4634DY can be seen below.