The DMNH4006SK3 from Diodes Incorporated is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 6 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for DMNH4006SK3 can be seen below.