The AP3P050AK from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current -4.9 to -6.1 A, Drain Source Resistance 50 to 90 milli-ohm, Drain Source Breakdown Voltage -30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -1 to -3 V. Tags: Surface Mount. More details for AP3P050AK can be seen below.