The APT18M80S from Microchip Technology is a MOSFET with Continous Drain Current 19 A, Drain Source Resistance 530 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Surface Mount. More details for APT18M80S can be seen below.