Mitsubishi FR-A840 400V High Performance Inverter

The Mitsubishi FR-A840 400V High Performance Inverter is the flagship general-purpose drive in Mitsubishi Electric's FR-A800 series, offering the most sophisticated motor control capability in its class for demanding industrial applications across Saudi Arabia and the wider GCC region. Available in power ratings from 0.4 kW to 500 kW on 380–480 V three-phase supply, the FR-A840 brings real sensorless vector (RSV) control — Mitsubishi's highest performance open-loop torque algorithm — to the broadest range of industrial motor types, including standard induction, permanent magnet synchronous, and PM reluctance motors. RSV control delivers torque accuracy of ±3% and speed regulation of ±0.01% without an encoder, matching the dynamic performance of many closed-loop systems at a significantly lower total installed cost by eliminating the encoder, cable, and associated panel interface hardware.

The FR-A840 incorporates Mitsubishi's regenerative braking function with an internal braking transistor on frames up to 75 kW, eliminating the need for an external braking unit in most hoisting, crane, and winding applications. For large-drive regenerative applications in Saudi steel mills, cement plants, and wind-test facilities, the FR-A840 supports connection to an optional power regeneration converter (FR-XC), returning braking energy to the supply rather than dissipating it as heat — a critical advantage in facilities where air-conditioning costs for braking resistor heat removal are significant. The drive's vector control with encoder input (when an optional encoder interface is fitted) reaches speed regulation of ±0.002% and torque accuracy of ±1%, enabling tension control, draw control, and synchronised multi-axis applications in paper, textiles, and wire-drawing machinery being installed across Saudi Vision 2030 manufacturing projects.

In Saudi Arabia, the FR-A840 is the inverter of choice for the most technically demanding process applications: pump station variable-flow control in National Water Company's network expansion projects across the Kingdom, high-duty conveyor and bucket elevator drives in MAADEN phosphate and gold mining operations at Al Jalamid and Mahd Ad Dhahab, compressor trim-control drives in ARAMCO gas compression stations, and winder/unwinder tension-control drives in the new Saudi printing and plastics converting facilities. The drive's ambient tolerance of −10°C to +50°C and optional IP55 enclosure allow direct installation in outdoor E-houses and equipment rooms without additional air conditioning in most Saudi Arabian climates. The extensive fault diagnostic logging — 20 fault records with timestamped operating data — significantly reduces mean time to repair in remote Saudi industrial sites with limited on-site maintenance expertise.

Razz Middle East maintains local inventory of the most common FR-A840 frame sizes and current ratings in Riyadh, enabling same-day dispatch for standard ratings and fast sourcing for large frames. Our engineering team offers free application sizing, motor-drive selection calculations, and harmonic study support for projects requiring SEC or IEEE 519 compliance documentation. Full commissioning, start-up assistance, parameter documentation, and spare-parts support are available across the Kingdom. Volume project pricing in SAR is provided within four working hours of RFQ.