The Si8489EDB from Vishay is a MOSFET with Continous Drain Current 5.4 A, Drain Source Resistance 36 to 82 Milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.2 to -0.5 V. Tags: Surface Mount. More details for Si8489EDB can be seen below.