The FDMC8554 from onsemi is a MOSFET with Continous Drain Current 16.5 A, Drain Source Resistance 5 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 3 V. Tags: Surface Mount. More details for FDMC8554 can be seen below.