The Si4058DY from Vishay is a MOSFET with Continous Drain Current 10.3 A, Drain Source Resistance 21.7 to 33 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.8 V. Tags: Surface Mount. More details for Si4058DY can be seen below.