The AP4002H-HF from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 2 A, Drain Source Resistance 5 ohm, Drain Source Breakdown Voltage 600 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for AP4002H-HF can be seen below.