Mitsubishi MR-J3-200B4 Servo Amplifier

The Mitsubishi MR-J3-200B4 is a versatile servo amplifier from the MELSERVO MR-J3 series, designed for 400V class industrial power systems. This unit combines robust power handling with precise control for a wide range of automation tasks. It features advanced connectivity and reliable safety mechanisms for demanding environments.

Primary Electrical Specifications

• Manufacturer & Model: Mitsubishi MR-J3-200B4 Servo Amplifier.
• Supply Voltage: 3-phase 380 to 480 Volts AC (323-528V permissible range).
• Input Frequency: 50/60 Hz with a ±5% permissible fluctuation.
• Control Method: Sine wave PWM control and current control.
• Communication: High-speed SSCNET III/H optical interface.
• Interface Power: Requires 24 VDC at 0.15 Amperes.

Design & Protection Features

• Braking System: Equipped with a built-in dynamic brake for safety and control.
• Cooling Method: Forced ventilation cooling ensures stable thermal performance.
• Protection Rating: Open enclosure with an IP00 rating (requires cabinet installation).
• Power Consumption: Efficient operation with a power consumption of 45 Watts.
• Operating Temperature: Reliable in ambient temperatures from 0 to 55 °C (non-freezing).
• Physical Weight: Approximately 4.63 lbs (2.1 kg) for manageable installation.

Packaging & Shipping Information

• One Mitsubishi MR-J3-200B4 Servo Amplifier unit.
• Complete installation guide and technical documentation.
• All necessary mounting hardware and connection accessories.
• International shipping available via FedEx, UPS, and DHL services.

Professional FAQ

• What does the 400V class designation mean for system compatibility?

This means the amplifier is designed for industrial three-phase power systems commonly rated at 400V, 415V, or 440V. You must pair it with a compatible 400V class Mitsubishi servo motor to ensure proper and safe operation.

• Why is an IP00 rating specified, and how should it be installed?

IP00 offers no protection against dust or liquids. The MR-J3-200B4 is intended to be installed inside a sealed or protected industrial control cabinet (recommended IP54 or higher) to shield it from environmental contaminants, chips, and moisture.

• How does the forced ventilation cooling work in practice?

An internal fan draws air through the amplifier's heatsinks to dissipate heat generated during operation. Ensure the installation follows the manual's clearance guidelines to allow for proper air intake and exhaust, preventing overheating.

• What is the benefit of the wide permissible voltage range (323-528V)?

This feature provides excellent tolerance for voltage sags and surges on the factory power line. It allows the amplifier to maintain operation during brief voltage fluctuations that might otherwise cause a fault or shutdown, improving overall system uptime.

• What is the purpose of the separate 24VDC interface power supply?

This low-voltage supply powers the amplifier's control logic, communication circuits (SSCNET III/H), and digital I/O. It must be provided by a stable, Class 2 or SELV power source separate from the high-power motor circuit for safety and noise immunity.

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