The DMTH43M8LK3 from Diodes Incorporated is a MOSFET with Continous Drain Current 17.6 to 100 A, Drain Source Resistance 2.9 to 5.2 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for DMTH43M8LK3 can be seen below.