Mitsubishi HK-KT43UWJ Regenerative Converter Unit for MELSERVO J4 Series

The Mitsubishi HK-KT43UWJ is a regenerative resistance converter unit designed for use with the MELSERVO J4 servo drive series. It provides a rated output of 850 Watts (0.85 kW) and features a built-in regenerative resistance of 3 Ohm, allowing the unit to absorb and dissipate excess energy generated during servo motor deceleration and braking cycles. The HK-KT43UWJ supports a supply voltage of 100V or 200V AC, making it suitable for a range of single-phase and three-phase power configurations commonly found in automated manufacturing environments. This converter unit is functionally equivalent to the Mitsubishi MRRB9F model. It is typically used in motion control systems where servo amplifiers require external regenerative capacity to handle high-inertia loads, frequent start-stop operations, or rapid deceleration profiles. Common applications include CNC machine tools, packaging machinery, material handling equipment, and general factory automation systems that rely on Mitsubishi MELSERVO J4 servo drives.