The Si1025X from Vishay is a MOSFET with Continous Drain Current 0.2 A, Drain Source Resistance 4000 milliohm, Drain Source Breakdown Voltage -60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to -3 V. Tags: Surface Mount. More details for Si1025X can be seen below.