The APT37F50B from Microchip Technology is a MOSFET with Continous Drain Current 37 A, Drain Source Resistance 150 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 5 V. Tags: Through Hole. More details for APT37F50B can be seen below.