Mitsubishi Electric MR-J3-100B Servo Amplifier

The Mitsubishi Electric MR-J3-100B servo amplifier is a 1.0 kW motion-control drive from the MELSERVO-J3 family that precisely regulates speed, torque, and position of compatible servo motors in CNC machines, packaging lines, robotics, and automated production systems. It accepts 200–230 VAC, three-phase input and uses Sinusoidal PWM with current control, with built-in dynamic braking and high-resolution encoder feedback to deliver fast, stable positioning; control interfaces include pulse, analog, and model-dependent network options, with RS-422/485 and USB available depending on unit. The unit features a panel-mount design with cooling options ranging from forced air to natural convection (model variant), operating from 0°C to 55°C, and protections for overcurrent, overvoltage, overload, overspeed, and encoder faults. Common replacements for this drive include Mitsubishi MR-J4-100B, MR-J3-100A, and MR-J3-130B.