The FDB031N08 from onsemi is a MOSFET with Continous Drain Current 235 A, Drain Source Resistance 3.1 milliohm, Drain Source Breakdown Voltage 75 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 4.5 V. Tags: Surface Mount. More details for FDB031N08 can be seen below.