The AP4056MT from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 40.3 to 230 A, Drain Source Resistance 1.28 to 2.2 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for AP4056MT can be seen below.