The AP50AN500I from Advanced Power Electronics Corp is a MOSFET with Continous Drain Current 13 A, Drain Source Resistance 0.5 ohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for AP50AN500I can be seen below.