The AP6N090LK from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 3.3 to 4.1 A, Drain Source Resistance 90 to 110 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.8 to 2.5 V. Tags: Surface Mount. More details for AP6N090LK can be seen below.