Mitsubishi FFR-HEL-H3.7K-E DC Reactor for FREQROL FR Inverters

The Mitsubishi FFR-HEL-H3.7K-E (FFR-HEL-H3.7K-E) is a power factor improving DC reactor engineered for use with Mitsubishi FREQROL FR series variable frequency drives. Operating in 400V class installations, this dedicated choke is designed to match 3.7 kW inverter drives across the FREQROL family, including industrial motor control systems and automation equipment. Connecting directly to the intermediate DC bus terminals of the frequency inverter, the DC link reactor plays an essential role in smoothing ripple current, mitigating high-frequency harmonic distortion, and enhancing overall system electrical efficiency. By suppressing current spikes and protecting upstream power components and internal rectifier stages, the FFR-HEL-H3.7K-E promotes stable drive operation, limits thermal stress, and extends the service life of connected industrial drive equipment. Typical applications include manufacturing machinery, pump and fan drives, conveyor systems, and process automation installations requiring reliable harmonic attenuation and compliant power quality.