The AP3N045LEN from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 3.3 to 4.1 A, Drain Source Resistance 45 to 60 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.3 to 1.5 V. Tags: Surface Mount. More details for AP3N045LEN can be seen below.