The Si2306BDS from Vishay is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 38 to 65 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for Si2306BDS can be seen below.