What this drive is and where it fits
The Mitsubishi FR-A740-0.4K-CHT is a 0.4 kW inverter from the FR-A700 Series, built for three-phase 400V class supply. It drives induction motors up to 0.4 kW, well suited for light variable-torque loads like fans and small centrifugal pumps. Out here in the grease, I've pulled plenty of these out of pump panels — they're compact and do the job on small motor circuits.