The Si8806DB from Vishay is a MOSFET with Continous Drain Current 3.9 A, Drain Source Resistance 35 to 75 Milliohm, Drain Source Breakdown Voltage 12 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.4 to 1 V. Tags: Surface Mount. More details for Si8806DB can be seen below.