Mitsubishi MR-J3-15KBS4 High-Power Servo Amplifier: Unmatched 15kW Precision

The Mitsubishi MR-J3-15KBS4 is a powerhouse servo amplifier designed for demanding industrial motion control. Delivering a robust 15 kW of rated output, this drive handles high-performance applications with exceptional precision, thanks to its SSCNET III/H interface and 262,144 pulses/rev resolution. Built for 380-480VAC three-phase systems, it combines advanced control technology with forced cooling for reliable operation in heavy-duty automation.

Complete Product Overview

• Brand & Series: Mitsubishi MELSERVO MR-J3 Series
• Model Number: MR-J3-15KBS4
• Amplifier Type: High-Power, 3-Phase AC Servo Amplifier
• Key Feature: 15 kW output with SSCNET III/H high-speed network control

Core Technical Specifications

• Rated Output Power: 15 kW
• Supply Voltage: 380 to 480 VAC, 3-Phase, 50/60 Hz
• Rated/Max Current: 31.8 A / 41 A
• Control Interface: SSCNET III/H (High-speed serial communication)
• Control Power: 24 VDC
• Positioning Resolution: 262,144 pulses/revolution
• Control Method: Sine Wave PWM & Current Control
• Cooling Method: Forced Ventilation Cooling
• Protection Rating: IP00 (Open Chassis - Must be installed in a cabinet)
• Allowable Frequency Fluctuation: ±5%
• Braking: Requires External Dynamic Brake Unit
• Dimensions (W x H x D): 260 mm x 400 mm x 260 mm (10.24" x 15.75" x 10.24")

Key Features & Benefits

• High-Power Density: Delivers 15 kW of precise control in a relatively compact chassis for high-torque applications.
• Ultra-High Precision: Exceptional 262,144 pulses/rev resolution enables extremely accurate positioning and smooth motion.
• Advanced Network Control: SSCNET III/H interface allows for high-speed, multi-axis synchronous control with reduced wiring.
• Robust Performance: High current rating (41A) and tolerance to power fluctuations (±5%) ensure stable operation in tough industrial environments.
• Effective Thermal Management: Forced ventilation cooling maintains optimal operating temperature under continuous heavy loads.

Typical Applications

This amplifier is engineered for large-scale, high-performance automation:

• Large CNC machine tools (milling, turning centers)
• Industrial robots and heavy-duty manipulators
• Plastic injection molding machines
• Metal forming and stamping presses
• Large material handling and conveying systems

Compatibility & System Integration

The MR-J3-15KBS4 is designed to drive compatible high-power Mitsubishi HC-SFS, HC-RFS, and HC-UFS series servo motors. It integrates seamlessly into Mitsubishi's motion control ecosystem via the SSCNET III/H network, connecting directly to motion controllers like the Q17?0M for sophisticated multi-axis systems. It must be installed inside a protected control cabinet (IP00 rating).

Ordering & Service Information

This product is sold as new and original, shipped in factory packaging. It is covered by a standard 12-month warranty. We ensure reliable global delivery via FedEx, UPS, and DHL.

Professional FAQs

What is SSCNET III/H and why is it important?

SSCNET III/H is Mitsubishi's high-speed fiber-optic servo network. It enables ultra-fast, precise synchronization between multiple drives and the master controller, drastically reducing wiring and noise interference.

Why does this amplifier have an IP00 rating?

IP00 means it has no protection against dust or water. High-power drives like this generate significant heat and are always installed inside a sealed, ventilated control cabinet which provides the necessary environmental protection.

Is the dynamic brake included with the amplifier?

No. The "External dynamic brake" specification means you must purchase and connect a compatible external brake resistor unit to safely dissipate regenerative energy from the motor during deceleration.

Can this drive operate on a 200VAC power supply?

No. The MR-J3-15KBS4 is specifically designed for 380-480VAC three-phase power. Using a lower voltage will not allow it to achieve its rated performance and may damage the unit.

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

This powers the drive's control circuits, I/O interfaces, and the SSCNET III/H communication interface. It must be supplied separately from the main 3-phase power.

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