The Mitsubishi Electric MR-J3-70A is a general-purpose AC motion servo drive/amplifier from the discontinued MELSERVO J3 series. It has a rated output of 750W (0.75kW) and was commonly used in industrial automation for controlling servo motors. Since the J3 series has been succeeded by newer models, it is often purchased from distributors specializing in legacy automation parts.
Specifications:
According to Mitsubishi Electric, the MR-J3-70A offers the following technical details:
- Output Power: 750W / 0.75kW
- Rated Current: 5.8A
- Supply Voltage: 200–230 VAC (200V class), single-phase (2P) or 3-phase (3P) input
- Safety Features: Built-in dynamic brake, built-in regenerative resistor, overcurrent shut-off, regeneration overvoltage shut-off, overload shut-off, servo motor overheat protection, and encoder fault protection.
- Communication: RS-422 communication capability.
- Compatible Motors: The MR-J3-70A is compatible with several motor series, including HF-KP, HF-MP, HF-JP, and HC-UP. Specifically, it’s known to be compatible with HF-KP73 and HF-MP73 servo motors.
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