The AP2318BEN from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 0.42 to 0.53 A, Drain Source Resistance 0.67 to 3 ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 1 to 1.7 V. Tags: Surface Mount. More details for AP2318BEN can be seen below.