The Si5403DC from Vishay is a MOSFET with Continous Drain Current -6 A, Drain Source Resistance 25 to 44 Milliohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -3 to -1 V. Tags: Surface Mount. More details for Si5403DC can be seen below.