The AP2604GY-HF from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 4.4 to 5.5 A, Drain Source Resistance 45 to 65 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 AP2604GY-HF can be seen below.