The Si1050X from Vishay is a MOSFET with Continous Drain Current 1.34 A, Drain Source Resistance 71 to 120 milliohm, Drain Source Breakdown Voltage 8 V, Gate Source Voltage -5 to 5 V, Gate Source Threshold Voltage 0.35 to 0.9 V. Tags: Surface Mount. More details for Si1050X can be seen below.