The NTD600N80S3Z from onsemi is a MOSFET with Continous Drain Current 8 A, Drain Source Resistance 550 to 600 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2.2 to 3.8 V. Tags: Surface Mount. More details for NTD600N80S3Z can be seen below.