Mitsubishi Electric MR-J4-70A Servo Amplifier

The Mitsubishi Electric MR-J4-70A Servo Amplifier is a 750 W AC servo drive in the MELSERVO-J4 series, designed for panel-mounted installation to deliver precise position, speed, and torque control with fast dynamic response in demanding industrial automation tasks. It operates from 200–240 V AC and uses advanced digital servo control with auto-tuning and vibration suppression, with high-resolution encoder feedback to ensure accurate closed-loop positioning. The servo drive supports SSCNET III/H communications (model dependent) for integrated motion networking with other Mitsubishi equipment. Typical applications include CNC machines, robotics, packaging lines, conveyors, printing machinery, and assembly cells where rapid response and precise positioning are essential, and it is commonly used for machine automation upgrades, control panel integration, and replacing existing servo drives. Common replacements in the MR-J4 family include MR-J4-100A and MR-J3-70A, with Yaskawa SGDV-750A listed among related options. Operating temperature range is 0°C to 55°C.