Mitsubishi HK-KT43BG7-1-33 Regenerative Resistor Unit for MELSERVO J4 Series

The Mitsubishi HK-KT43BG7-1-33 is a regenerative resistor unit designed for use with the MELSERVO J4 series of servo drive systems. It provides controlled dissipation of regenerative energy generated during servo motor deceleration and braking, protecting the drive and ensuring stable system operation. This unit is rated at a nominal output of 300 W (0.3 kW) and features a resistance value of 6.7 Ohm. The HK-KT43BG7-1-33 supports an AC supply voltage of either 100 V or 200 V, making it adaptable to different power configurations. It is considered equivalent to the Mitsubishi MRRB31 regenerative resistor, allowing it to serve as a direct replacement in compatible installations. Typical applications include CNC machine tools, industrial robots, automated assembly lines and other motion control systems where MELSERVO J4 servo amplifiers are deployed and excess braking energy must be safely absorbed.