FR-A840-00126-2-60 FREQROL-A800 3.7kW Inverter Conformal Coated | Mitsubishi Electric

The Original New Mitsubishi Electric FR-A840-00126-2-60 is a 3.7 kW (5 HP) high-performance inverter from the FREQROL-A800 Plus series, designed for demanding industrial motor control applications. Featuring factory-applied conformal coating on internal printed circuit boards and a CA-type current output terminal (0–20 mA), this variant is engineered for reliable operation in harsh environments including wash-down facilities, coastal installations, and chemically exposed process areas. Rated at 3.7 kW Normal Duty (5.5 kW Light Duty / Super Light Duty, 2.2 kW Heavy Duty) with a 380–500 V three-phase input, it delivers 9 A (ND) output current and a 0.2–590 Hz output frequency range. Built-in RS-485 (Modbus RTU) communication, a 6K-step PLC function, and advanced control modes including Real Sensorless Vector and PM Sensorless Vector control reduce the need for external components.

Core Engineering Highlights:
3.7 kW (ND) / 5.5 kW (LD/SLD) / 2.2 kW (HD) | 9 A (ND) / 11.5 A (LD) / 12.6 A (SLD) / 6 A (HD) output current | 380–500 V 3-phase input (±10%) | 0.2–590 Hz output frequency | Conformal coating (IEC 60721-3-3 3C2 / 3S2) | CA terminal: 0–20 mA current output | V/F, Advanced magnetic flux vector, Real sensorless vector, PM sensorless vector control | Built-in RS-485 (Modbus RTU) + USB | 6K-step PLC function | Built-in brake transistor (100% torque, 2% ED) | IP20 | Forced air cooling

Key Features:

• Original New Mitsubishi Electric FR-A840-00126-2-60 inverter

• Factory-applied conformal coating on PCBs for protection against moisture, condensation, and corrosive airborne contamination (IEC 60721-3-3 3C2 / 3S2)

• CA-type terminal provides 0–20 mA current analogue output for noise-immune signal transmission over long cable runs

• Multiple control methods: V/F control, Advanced magnetic flux vector control, Real sensorless vector control, Optimum excitation control, and PM sensorless vector control

• Built-in RS-485 (Modbus RTU) communication port for network integration

• USB port for PC connection and FR Configurator2 software configuration

• Integrated 6K-step PLC function for simple sequence control without an external PLC

• Built-in brake transistor (100% torque, 2% ED) for dynamic braking

• 5 digital inputs, 2 analogue inputs, 2 digital outputs, 1 relay output

• Safety stop function (STO) for machine protection

• Soft-PWM control and high carrier frequency PWM control

• PID control, multi-speed operation, and automatic restart after instantaneous power failure

• Forced air cooling for reliable thermal management

• Rated input current (without DC reactor): 12.3 A (ND), 15.1 A (LD), 16.4 A (SLD), 8.3 A (HD)

• Power loss: 120 W (ND), 90 W (HD)

• Standby power consumption: approx. 19 W

Applications:

• Wash-down facilities and food processing plants requiring moisture-resistant electronics

• Chemical process environments with airborne acids or alkalis

• Coastal and outdoor installations exposed to humidity cycling and condensation

• Pump and fan control in water treatment and HVAC systems

• Conveyor and material handling systems

• Compressors and industrial machinery in harsh environments

• Remote speed reference applications using 0–20 mA current loop signalling from PLCs or process controllers

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric FREQROL FR-A800 Plus series architecture. Drive model and firmware compatibility should be verified before installation.

• Built-in RS-485 port supports Modbus RTU communication for PLC, SCADA, and network integration

• USB port for PC connection and FR Configurator2 software configuration

• Compatible with FR-A8AP (encoder feedback) and FR-A8N□ (communication) option cards for extended functionality

• Suitable for use with standard three-phase induction motors and permanent magnet (PM) motors

Related Products:

• FR-A840-00052-2-60 – 1.5 kW version (lower power)

• FR-A840-00170-2-60 – 5.5 kW version (higher power)

• FR-A840-00250-2-60 – 7.5 kW version

• FR-A8AP – Encoder feedback option card

• FR-A8NC – CC-Link communication option card

• FR Configurator2 – Setup and monitoring software

• FR-DU08 – Operation panel (included with drive)

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and FREQROL are trademarks of Mitsubishi Electric Corporation.