The DMG3420UQ from Diodes Incorporated is a MOSFET with Continous Drain Current 3.43 to 5.47 A, Drain Source Resistance 21 to 91 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage 12 V, Gate Source Threshold Voltage 0.50 to 1.2 V. Tags: Through Hole. More details for DMG3420UQ can be seen below.