The Mitsubishi FR-D740-3.7K-CHT is a 3-phase 400V inverter rated at 3.7 kW. For proper cooling, it must be installed vertically, either in a panel or on a wall, to ensure adequate ventilation. This inverter is generally not suitable for driving single-phase motors. Using it with a single-phase motor—such as a switched-start, capacitor-start, or capacitor-run type—can damage the auxiliary winding or the capacitor due to improper speed control. While some small-capacity inverters can operate on single-phase power, this model is designed for three-phase input.