The FDY4000CZ from onsemi is a MOSFET with Continous Drain Current -0.35 to 0.6 A, Drain Source Resistance 300 to 2700 milliohm, Drain Source Breakdown Voltage -20 to 20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.5 to 1.5 V. Tags: Surface Mount. More details for FDY4000CZ can be seen below.