The FDMS86550 from onsemi is a MOSFET with Continous Drain Current 234 A, Drain Source Resistance 1.65 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 4.5 V. Tags: Surface Mount. More details for FDMS86550 can be seen below.