The MCU20N10 from Micro Commercial Components is a MOSFET with Continous Drain Current 20 A, Drain Source Resistance 43 to 53 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.1 to 3 V. Tags: Surface Mount. More details for MCU20N10 can be seen below.