The FDS8840NZ from onsemi is a MOSFET with Continous Drain Current 18.6 A, Drain Source Resistance 4.5 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 V. Tags: Surface Mount. More details for FDS8840NZ can be seen below.