The AP4028GEMT-HF from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 15 to 41.6 A, Drain Source Resistance 7.2 to 20 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.2 to 2.5 V. Tags: Surface Mount. More details for AP4028GEMT-HF can be seen below.