Mitsubishi MR-RB9F Regenerative Resistor Unit for MELSERVO Drives

The Mitsubishi MR-RB9F is an external regenerative resistor unit engineered to dissipate regenerative braking energy generated by servo motors in automated machinery and motion control systems. Designed for use with Mitsubishi MELSERVO series servo drive systems, this regenerative braking resistor absorbs and dissipates surplus kinetic energy produced during rapid motor deceleration, vertical axis movements, or continuous overhauling loads, thereby protecting the drive's DC bus from overvoltage faults. Featuring a robust industrial enclosure built to withstand demanding factory environments, the MR-RB9F helps maintain smooth operation and stability in motion profiles requiring high-duty braking cycles. The unit weighs 10 kg and is equipped for seamless integration into industrial control cabinets alongside compatible Mitsubishi drive equipment. Typical applications include CNC machine tools, packaging lines, material handling systems, pick-and-place robotics, and automated production machinery where controlled braking performance and thermal dissipation are critical for uninterrupted operation.