The APT18M100B from Microchip Technology is a MOSFET with Continous Drain Current 18 A, Drain Source Resistance 700 milliohm, Drain Source Breakdown Voltage 1000 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 5 V. Tags: Through Hole. More details for APT18M100B can be seen below.