Mitsubishi HK-KT43UWBWS Regenerative Resistor Unit for MELSERVO J4 Series

The Mitsubishi HK-KT43UWBWS is a regenerative resistor converter unit designed for use with the MELSERVO J4 series servo drive systems. It serves as an equivalent to the MR-RB-6K4 regenerative braking resistor, providing reliable dissipation of excess regenerative energy generated during servo motor deceleration and braking operations. In servo-driven applications, regenerative energy is fed back into the DC bus when the motor decelerates or holds a load. The HK-KT43UWBWS absorbs this energy as heat, protecting the servo amplifier from overvoltage conditions and ensuring stable, uninterrupted operation. This unit is intended for integration with Mitsubishi MELSERVO MR-J4 series servo amplifiers and is suited for machine tool, packaging, material handling and general factory automation applications where controlled braking is essential for performance and safety.