The FDT4N50NZU from onsemi is a MOSFET with Continous Drain Current 1.2 to 2 A, Drain Source Resistance 2.42 to 3 milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage 25 V, Gate Source Threshold Voltage 3.5 to 5.5 V. Tags: Through Hole. More details for FDT4N50NZU can be seen below.