The Si1034CX from Vishay is a MOSFET with Continous Drain Current 0.61 A, Drain Source Resistance 330 to 760 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.4 to 1 V. Tags: Surface Mount. More details for Si1034CX can be seen below.