The APT17F120J from Microchip Technology is a MOSFET with Continous Drain Current 18 A, Drain Source Resistance 580 milliohm, Drain Source Breakdown Voltage 1200 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 5 V. Tags: Screw Mount. More details for APT17F120J can be seen below.