FR-D740-0.4K-CHT is the model number of a Mitsubishi inverter. It is a compact and cost-effective inverter designed for motor control applications. The "FR" in the model number stands for "frequency inverter," indicating its function of controlling the frequency and speed of an AC motor. The "D740" indicates its series or family name, and the "0.4K" represents the rated power capacity of the inverter, which is 0.4 kilowatts. The "CHT" signifies that this particular model is designed for use in China (CH) with a three-phase voltage input (T).