The Si4103DY from Vishay is a MOSFET with Continous Drain Current -16 A, Drain Source Resistance 6.7 to 10.8 milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to -2 V. Tags: Surface Mount. More details for Si4103DY can be seen below.