FR-D740-3.7K-CHT FREQROL-D700 3.7kW 400V Inverter | Mitsubishi

The Original New Mitsubishi FR-D740-3.7K-CHT is a three-phase 400 V class compact inverter from the FREQROL-D700 series, designed for reliable variable speed control of three-phase induction motors. It delivers 3.7 kW (5 HP) of output power with a rated output current of 8.0 A and accepts a 380–480 V AC three-phase supply. Featuring general-purpose magnetic flux vector control, the drive achieves 150% starting torque at 1 Hz for demanding low-speed applications. Built-in RS-485 Modbus-RTU communication, integrated brake transistor, and configurable protective functions make it a versatile solution for machine automation, pumps, fans, and conveying systems. This model is widely used in production lines, material handling, food packaging, and processing machinery.

Core Engineering Highlights:
3.7 kW (5 HP) rated output | 8.0 A rated output current | Three-phase 380–480 V AC input | 0.2–400 Hz output frequency range | General-purpose magnetic flux vector control | 150% starting torque at 1 Hz | Built-in RS-485 Modbus-RTU communication | Built-in brake transistor | IP20 protection | Forced air cooling

Key Features:

• Original New Mitsubishi FR-D740-3.7K-CHT inverter

• 3.7 kW (5 HP) rated motor capacity

• Three-phase 380–480 V AC input, 50/60 Hz

• Rated output current: 8.0 A

• Output frequency range: 0.2–400 Hz

• Overload capacity: 150% for 60 s, 200% for 0.5 s (inverse-time characteristic)

• Control methods: Soft-PWM / high carrier frequency PWM (V/F control, general-purpose magnetic flux vector control, optimum excitation control)

• Built-in brake transistor for dynamic braking

• RS-485 communication with Modbus-RTU protocol

• Configurable protective functions: overcurrent, overvoltage, undervoltage, overload (electronic thermal), output short-circuit, earth fault, heatsink overheat, input phase loss, output phase loss, CPU fault

• Long-life components for extended service intervals

• Compact 108 mm width for space-efficient panel mounting

• RoHS compliant

Applications:

• Production line conveyor speed control

• Fan and blower speed regulation

• Packaging machinery and food processing equipment

• Pump and fluid handling systems

• Material handling and conveying systems

• General industrial automation requiring compact motor control

Technical Specifications:

System Compatibility:

• Compatible with three-phase induction motors rated up to 3.7 kW

• RS-485 Modbus-RTU communication for integration with PLCs and SCADA systems

• Configurable via FR Configurator software through the PU connector

• Supports FR-PA07 enclosure surface operation panel (sold separately)

• Suitable for OEM equipment and panel integration

Related Products:

• FR-D740-2.2K-CHT – 2.2 kW version (lower power)

• FR-D740-5.5K-CHT – 5.5 kW version (higher power)

• FR-D740-7.5K-CHT – 7.5 kW version (higher power)

• FR-PA07 – Enclosure surface operation panel (optional)

• FR-CB201 – Parameter unit connection cable, 1 m

• FR Configurator2 – Setup and monitoring software for FREQROL-D700 series

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, FREQROL, and MELSEC are trademarks of Mitsubishi Electric Corporation.