The MCR03FZHJ822 is a high power, low on-resistance, N-channel MOSFET made by ROHM Semiconductor. It is designed specifically for power supply, motor drive, and DC-DC converter applications. It has an on-resistance of just 0.03O and a maximum drain-source voltage of 20V. It has excellent switching characteristics, and its exceptional heat dissipation allows it to handle large current loads.