The AP5527DT1 from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 3.2 to 4.1 A, Drain Source Resistance 72 milli-ohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for AP5527DT1 can be seen below.