The AP9973GM-HF from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 2.5 to 3.9 A, Drain Source Resistance 80 to 100 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 AP9973GM-HF can be seen below.