The FDMC4D9P20X8 from onsemi is a MOSFET with Continous Drain Current -75 A, Drain Source Resistance 4.9 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -1.6 V. Tags: Surface Mount. More details for FDMC4D9P20X8 can be seen below.