The Si6423DQ from Vishay is a MOSFET with Continous Drain Current 9.5 A, Drain Source Resistance 6.8 to 14 Milliohm, Drain Source Breakdown Voltage -12 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage -0.8 to -0.4 V. Tags: Surface Mount. More details for Si6423DQ can be seen below.