The MCT04N10B from Micro Commercial Components is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 77 to 120 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 MCT04N10B can be seen below.