Mitsubishi MR-J4-DU30KA4-RJ MELSERVO MR-J4 Servo Amplifier Drive Unit

The Mitsubishi MR-J4-DU30KA4-RJ (MR-J4-DU30KA4-RJ) is an AC servo amplifier drive unit designed for high-performance motion control within the Mitsubishi Electric MELSERVO MR-J4 series. Engineered for precision positioning and dynamic speed regulation, this drive unit coordinates motion control tasks across automated machinery and industrial production systems. It features high-speed optical SSCNET III/H communication capability, enabling seamless deterministic networking and multi-axis synchronization with compatible motion controllers. Equipped with an integrated dynamic brake and built-in regenerative braking resistor, the MR-J4-DU30KA4-RJ delivers reliable stopping performance and energy dissipation during high-inertia operations. The unit provides a rated output of 3.5 kW (3,500 W) with a rated current of 17 A. It operates on a 200 V to 240 V AC supply voltage supporting single-phase or three-phase input configurations. Rated with an IP20 degree of protection, the servo drive operates in ambient temperatures from 0 to +55 degrees Celsius, functionally equivalent to MRJ4350B.