The FCMT180N65S3 from onsemi is a MOSFET with Continous Drain Current 17 A, Drain Source Resistance 180 milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 4.5 V. Tags: Surface Mount. More details for FCMT180N65S3 can be seen below.