The AP6N090K from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 3.2 to 4.1 A, Drain Source Resistance 90 to 120 milli-ohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for AP6N090K can be seen below.