The AP4NA1R5HCST from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 36 to 225 A, Drain Source Resistance 1.5 milli-ohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.4 to 3.6 V. Tags: Surface Mount. More details for AP4NA1R5HCST can be seen below.