The AO3481 is a MOSFET P-Trench 30V 4A 1.3V@ 250uA 50mO @ 4A,10V SOT-23 RoHS manufactured by Alpha & Omega. It offers low on-resistance, high speed switching, and low gate charge performance. Rated VDSS (Continuous Drain to Source Voltage) is up to 30 volts with a maximum drain current of 4 amps. The on-resistance can go as low as 50mO@4A, 10V. The gate threshold level is 1.3V @ 250uA. It is an RoHS-compliant device, which means it is free from hazardous substances like lead, mercury, cadmium, hexavalent chromium, and polybrominated biphenyl flame retardants. The package size is SOT-23, a small six-pin package for surface mount components.