The AP4NA2R2HCST from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 29 to 160 A, Drain Source Resistance 2.28 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for AP4NA2R2HCST can be seen below.