The DMN3900UFA from Diodes Incorporated is a MOSFET with Continous Drain Current 0.65 A, Drain Source Resistance 400 to 1500 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -8 to 8 V, Gate Source Threshold Voltage 0.45 to 0.95 V. Tags: Surface Mount. More details for DMN3900UFA can be seen below.