The FCD3400N80Z from onsemi is a MOSFET with Continous Drain Current 2 A, Drain Source Resistance 3400 milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 4.5 V. Tags: Surface Mount. More details for FCD3400N80Z can be seen below.