Mitsubishi MR-J3-70B Servo Amplifier: Reliable Motion Control

Take control with precision. The Mitsubishi MR-J3-70B servo amplifier delivers efficient, accurate power for your automation systems. Perfect for robotics, CNC, and more, it works on common single-phase power.

Key Advantages at a Glance

• Energy Efficient: 80% inverse efficiency saves power and reduces heat.
• Ready to Use: Includes built-in dynamic brake and regenerative resistor.
• Compact Design: Saves panel space, easy to install in tight spots.
• Simple Connection: Works with standard 200-230V AC single-phase power.
• Smart Communication: SSCNET III interface for fast, reliable control.

Complete Technical Specifications

Manufacturer: Mitsubishi Electric
Model: MR-J3-70B
Series: MELSERVO-J3 Series Servo Amplifier
Rated Output Power: 0.75 kW (750 Watts)
Rated Current: 5.8 A
Power Supply: 200-230V AC, Single-Phase (1P), 50/60 Hz
Power Capacity (kVA): 1.3 kVA
Inverse Efficiency: 80%
Communication: SSCNET III Interface
Protection Features: Built-in Dynamic Brake, Regenerative Resistor, Overcurrent, Undervoltage
Regenerative Absorption: 37.1 Joules
Operating Temperature: 0°C to +55°C
Approx. Weight: 1.39 kg (3.06 lbs)
Cooling Requirement: Requires ~1 m² area for heat dissipation

Simple Installation & Use

Install the MR-J3-70B in a clean, ventilated cabinet. Ensure the ambient temperature stays within 0°C to 55°C. Connect it to a single-phase 200-230V AC power source. Link it to your main controller using the SSCNET III cable. The built-in protections help ensure safe, stable operation.

Expert FAQs

What is the main benefit of the 80% inverse efficiency?
It means the amplifier wastes less energy as heat. This improves overall system efficiency and can reduce cooling needs.

Can this amplifier run on three-phase power?
No. The MR-J3-70B is specifically designed for single-phase 200-230V AC input only.

What does the built-in regenerative resistor do?
It safely absorbs excess energy from the motor during deceleration or stopping, protecting the drive.

Is this model good for a small machine?
Yes. Its compact size and single-phase power requirement make it an excellent choice for smaller automation equipment.

How does the SSCNET III help performance?
It provides a high-speed, noise-resistant connection between the drive and controller, crucial for smooth, precise motion.

Package & Promise

In the Box:
1 x MR-J3-70B Servo Amplifier
1 x Instruction Guide

Our Warranty: Backed by a reliable 12-month warranty for your confidence.

Global Shipping: Delivered reliably worldwide via FedEx, UPS, and DHL.

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