Mitsubishi MR-J3-20B-RJ080W Compact Servo Drive

Control small to medium machines with high precision. The Mitsubishi MR-J3-20B-RJ080W is a smart servo drive. It delivers 0.4 kilowatts of power from a 200-230V AC supply. This unit uses the fast SSCNET III/H network for communication. Its compact size and natural cooling simplify cabinet design. Get reliable performance for your automation needs with this efficient drive.

• Fast Network: Uses SSCNET III/H for high-speed, synchronized control.
• Flexible Power: Works with single-phase or 3-phase 200-230V AC input.
• Energy Efficient: Low 30W power consumption for its output class.
• Built-in Safety: Includes a dynamic brake for controlled stopping.

Core Electrical Specifications

• Brand & Model: Mitsubishi MR-J3-20B-RJ080W Servo Drive.
• Supply Voltage: 200 to 230 Volts AC.
• Input Phase: 1-phase or 3-phase compatible.
• Rated Output: 0.4 kilowatts (400 Watts).
• Rated Current: 2.8 Amperes.
• Control Method: Sine-wave PWM and current control.
• Communication: SSCNET III/H interface.

Physical & Performance Specifications

• Dimensions (HxWxD): 168 x 40 x 170 mm (6.61" x 1.57" x 6.69").
• Cooling Method: Natural cooling (fanless).
• Power Consumption: Approximately 30 Watts.
• Input Current: 2.6 Amperes.
• Braking: Built-in dynamic brake.
• Discharge Time: Capacitor discharge within 1 minute after power-off.
• Frequency Response: Speed loop response up to 900 Hz.

Environmental & Integration Details

• Protection Rating: IP00 (Open Frame). Must be installed in a protective control panel.
• Input Frequency: 50 to 60 Hz.
• Operating Conditions: Designed for standard industrial cabinet environments.
• Network Role: Functions as a slave device on an SSCNET III/H network.
• Motor Compatibility: Pairs with Mitsubishi MELSERVO servo motors up to 0.4kW.

Packaging & Warranty

• The Mitsubishi MR-J3-20B-RJ080W is supplied new in original packaging.
• Includes the servo drive unit and installation manual.
• This product comes with a 12-month warranty.
• International shipping via FedEx, UPS, and DHL is available.
• A tracking number is provided once your order is shipped.

Frequently Asked Questions

What does a 900 Hz speed frequency response mean?

• It indicates how quickly the drive's speed control loop can react. A 900 Hz response means it can correct speed errors very rapidly, resulting in smoother motion, better following accuracy, and higher performance in dynamic applications compared to drives with lower response values.

Why is there a 1-minute capacitor discharge time warning?

• After turning off the main power, high-voltage capacitors inside the MR-J3-20B-RJ080W can retain a dangerous charge for up to one minute. You must wait this duration before touching any terminals to avoid the risk of electric shock during servicing.

Can I use this drive in a dusty environment if it's IP00?

• The IP00 rating means the drive has no protection against dust or liquids. You must install it inside a sealed control panel (at least IP54) to protect it from dust, chips, and moisture present in industrial environments.

Is an external regenerative resistor needed?

• For most 0.4kW applications with normal inertia, the built-in dynamic brake is sufficient. However, if your application involves high-inertia loads or very frequent stop/start cycles, consult the manual to determine if an external resistor is required to handle excess regenerative energy.

How do I connect the single-phase input option?

• When using single-phase 200-230V AC, you connect the live (L) and neutral (N) wires to the designated L1/L2 input terminals on the drive, as specified in the wiring diagram. The ground (PE) connection is always required.

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