The FCU600N65S3R0 from onsemi is a MOSFET with Continous Drain Current 6 A, Drain Source Resistance 600 milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 4.5 V. Tags: Through Hole. More details for FCU600N65S3R0 can be seen below.