The APT38F50J from Microchip Technology is a MOSFET with Continous Drain Current 38 A, Drain Source Resistance 100 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 5 V. Tags: Screw Mount. More details for APT38F50J can be seen below.