Mitsubishi MR-J3-350BRJ004U50 - 3.5 kW AC Servo Drive for 200V Systems

Drive demanding applications with the Mitsubishi MR-J3-350BRJ004U50. This powerful 3.5 kW AC servo amplifier from the MELSERVO-J3 series is built for robust three-phase 200V AC industrial power. Utilizing advanced sine-wave PWM and current control, it delivers smooth, high-torque performance for medium-power servo motors. With its SSCNET III interface and compliance with major safety standards, it's a reliable core component for CNC machines, industrial robots, and material handling systems.

Complete Technical Specifications

Brand & Series: Mitsubishi Electric MELSERVO MR-J3 Series

Full Model Number: MR-J3-350BRJ004U50

Product Type: High-Performance AC Servo Amplifier (Drive)

Rated Output Power: 3.5 kW

Supply Voltage: 200 VAC, 3-Phase, 50/60 Hz

Control Method: Sine Wave PWM Control, Real-time Current Control

Communication Interface: SSCNET III (High-Speed Serial Communication Network)

Protection Class: IP00 (Open-Type - must be installed in a protective control enclosure)

Compatible Motors: Mitsubishi HC-SF, HC-RF, HC-UP series and other MELSERVO-J3 compatible servo motors.

Operating Temperature: 0°C to +55°C (non-freezing)

Storage Temperature: -20°C to +65°C

Ambient Humidity: 90% RH or less (non-condensing)

Vibration Resistance: 5.9 m/s² (0.6G)

Compliance & Certifications: CE, UL Listed, cUL Listed, RoHS Compliant

Regenerative Braking: Built-in regenerative resistor may be required for high-duty cycle braking; external resistor option available.

Installation & Compatibility Guide

Install the MR-J3-350BRJ004U50 inside a secure, ventilated control cabinet (IP20 or higher). Connect a three-phase 200V AC power supply with appropriate circuit breakers and protection. Use the SSCNET III optical cable to link it to the motion controller (e.g., Mitsubishi Q series Motion CPU). Connect the compatible servo motor using specified power and encoder cables. Ensure adequate cooling; consider external regenerative resistors for high-inertia or frequent start/stop cycles to manage braking energy.

Package & Warranty

What's Included: 1 x Mitsubishi MR-J3-350BRJ004U50 Servo Amplifier Unit.

Our Guarantee: This industrial drive is protected by a full 12-month warranty.

Fast Shipping Options

We deliver worldwide using reliable couriers: FedEx, UPS, and DHL.

Frequently Asked Questions (FAQ)

What is the typical application for a 3.5 kW servo drive?

This power rating is ideal for medium-duty industrial applications such as main spindle drives for small CNC machines, large conveyor drives, pump control, or the primary axis in industrial robots requiring significant torque.

Can this drive operate on a single-phase power source?

No. The MR-J3-350BRJ004U50 is specifically designed for a three-phase 200V AC power supply. Using single-phase power will not provide sufficient capacity and may damage the unit.

What is SSCNET III and what are its benefits?

SSCNET III is Mitsubishi's high-speed fiber-optic motion network. It provides noise-immune communication, allows synchronous control of multiple axes from one CPU, reduces wiring complexity, and enables fast data exchange for precise coordination.

Is a regenerative resistor included?

Smaller drives often have built-in resistors, but at this 3.5 kW power level, an external regenerative resistor is typically required to be purchased separately and connected to handle the dissipated braking energy, especially in high-cycle applications.

How do I configure and tune the servo parameters?

Configuration and tuning are performed using Mitsubishi's MR Configurator2 software on a Windows PC, connected via the SSCNET III network or a dedicated setup cable. The software offers auto-tuning functions and manual parameter adjustment.

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