The MCG50N04 from Micro Commercial Components is a MOSFET with Continous Drain Current 50 A, Drain Source Resistance 3.3 to 5.2 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for MCG50N04 can be seen below.