The MCU120N04 from Micro Commercial Components is a MOSFET with Continous Drain Current 120 A, Drain Source Resistance 2.8 to 4.8 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 MCU120N04 can be seen below.