The Si1029X from Vishay is a MOSFET with Continous Drain Current 0.33 A, Drain Source Resistance 1250 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to 2.5 V. Tags: Surface Mount. More details for Si1029X can be seen below.