The NTD20N06T4G from onsemi is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 37.5 to 46 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Surface Mount. More details for NTD20N06T4G can be seen below.