The AP3NA3R4AMT from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 23.4 to 73 A, Drain Source Resistance 3.4 to 6.5 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.3 to 2.3 V. Tags: Surface Mount. More details for AP3NA3R4AMT can be seen below.