300 A ND at 400 V — the load rating that decides the fit
The FR-E840-0300-4-60 is a Mitsubishi FR-E800 series inverter rated for 300 A ND (normal duty) at 400 V class input. That 300 A figure is the continuous output current the drive can deliver to the motor without derating — it sets the horsepower ceiling for the driven load. For a 400 V motor, 300 A ND typically lands around 160–200 kW depending on the motor efficiency and service factor. The drive is three-phase input, so it expects a 400 V three-phase supply. The initial frequency is set to 50 Hz, which is the default for 50 Hz mains regions; it can be reprogrammed to 60 Hz during commissioning if the motor and site supply are 60 Hz.
Circuit board coating — why it matters for the environment
This variant (-60 suffix) ships with circuit board coating as standard. That coating protects the PCB from moisture, dust, and conductive contaminants — a real advantage in high-humidity or washdown areas where uncoated drives fail from tracking across the board. The plated conductors are omitted on this option, so if your application demands plated bus bars for high-current paths, check the -40 or -20 variants.
Sourcing and lifecycle — current production, quoted to order
Sourced through independent distribution channels. No stock-holding claim — each order is confirmed against real distributor inventory.