Mitsubishi FR-HEL-3.7K DC Reactor for FREQROL Inverters

The Mitsubishi FR-HEL-3.7K (FR-HEL-3.7K) is a DC reactor engineered for use with Mitsubishi Electric FREQROL series variable frequency drives and industrial inverter systems. Designed specifically for 3.7 kW motor drive installations, this power factor improving reactor connects directly into the DC intermediate circuit of compatible FREQROL inverters. Its primary function is to suppress harmonic currents generated by the rectifier circuit, reduce line current distortion, and substantially improve the overall input power factor of the drive system. In addition, the reactor limits direct current ripple, protecting the internal DC bus capacitors and power semiconductors against sudden voltage spikes and AC line disturbances. The FR-HEL-3.7K is widely utilized across factory automation, industrial motor control, machine tool applications, pump and fan controls, and material handling systems requiring reliable operation and harmonic compliance. Built for continuous operation in demanding electrical environments, it mounts seamlessly inside control cabinets alongside the drive.