The AP1504YT from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 4 to 15.8 A, Drain Source Resistance 50 to 59 milli-ohm, Drain Source Breakdown Voltage 150 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for AP1504YT can be seen below.