Mitsubishi MR-J3-15KB4 15kW Servo Amplifier

The Mitsubishi MR-J3-15KB4 is a high-power AC motion servo amplifier engineered for the most demanding industrial applications. This 15kW unit from the MELSERVO MR-J3 series delivers exceptional torque and precision for heavy-duty automation. It is built for 400V class systems and features advanced control capabilities.

Primary Electrical Specifications

• Manufacturer & Model: Mitsubishi MR-J3-15KB4 AC Motion Servo Amplifier.
• Rated Output: 15000W (15 kW) with a high rated current of 41 A.
• Supply Voltage: 3-phase 380-480 Vac input (400V class).
• Input Type: Designed for 3-phase input (3P) industrial power.
• Communication: High-speed SSCNET III/H optical network interface.
• Control Method: Sine wave PWM control for smooth and efficient motor operation.

Design & Operational Features

• Operating Mode: Specialized for precise positioning mode control.
• Cooling System: Forced ventilation cooling ensures thermal stability under heavy loads.
• Protection: Integrated overcurrent shut-off protection for system safety.
• Ambient Temperature: Rated for reliable operation from 0 to +55°C.
• Installation: Panel-mounted configuration; Dimensions: H400mm x W260mm x D260mm.
• Application: Ideal for large machine tools, heavy presses, and high-inertia material handling.

Packaging & Shipping Details

• One Mitsubishi MR-J3-15KB4 Servo Amplifier unit.
• Complete installation manual and technical documentation.
• All necessary mounting hardware for panel installation.
• Global shipping services via FedEx, UPS, and DHL for timely delivery.

Professional FAQ

• What industrial applications typically require a 15kW servo amplifier?

This amplifier is designed for very high-power applications such as large metal forming presses, heavy-duty CNC machining centers, large industrial robots, and automated material handling systems for heavy components where immense force and precise positioning are critical.

• How does the SSCNET III/H interface benefit a high-power positioning system?

The fiber-optic SSCNET III/H network provides ultra-fast, jitter-free communication between the controller and amplifier. This is essential for 15kW drives in positioning applications to ensure real-time command updates, resulting in higher accuracy, better synchronization in multi-axis systems, and reduced settling time.

• Why is forced ventilation cooling critical for this amplifier?

At 15kW of continuous power, the amplifier generates significant heat. The forced ventilation system (internal fan) actively circulates air to cool the power semiconductors and other critical components. This prevents thermal overload, ensures rated performance, and extends the service life of the unit.

• What are the key considerations for panel mounting this large amplifier?

Ensure the mounting panel is structurally sound to support the weight and vibration. Adhere strictly to the specified dimensions and clearance requirements (especially above and below for airflow) provided in the manual. Proper spacing from other heat-generating components is also crucial.

• Does the overcurrent protection protect the motor as well as the amplifier?

Yes, the overcurrent shut-off protection monitors the output current to the motor. If a fault like a motor stall, short circuit, or extreme overload occurs, it quickly shuts off the output, safeguarding both the MR-J3-15KB4 amplifier and the connected servo motor from damage.

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