High-Power Servo Drive for Demanding Industrial Automation

The Mitsubishi MR-J3-15KA4-LR is a 15 kW high-performance servo drive from the renowned MELSERVO-J3 series. Designed for powerful machinery, it delivers precise motion control for applications like large CNC machines, material handling systems, and heavy-duty robotics. Its robust design ensures reliable operation in challenging industrial environments.

Core Features & Benefits

High Power Output: Delivers 15 kW (41A) of driving force, capable of handling heavy loads and high-inertia applications with ease.

Ultra-High Precision: Offers exceptional positioning accuracy with a resolution of 262,144 pulses/revolution, ensuring repeatable and precise motion.

Built-in Regeneration Handling: Features 5 integrated regenerative resistors (10Ω each) to efficiently manage energy from motor braking, reducing the need for external units.

Robust Communication: Uses the reliable RS-422 serial protocol for stable and fast communication with the controller, crucial for synchronized multi-axis systems.

Complete Technical Specifications

Brand: Mitsubishi Electric

Series: MELSERVO MR-J3

Model Number: MR-J3-15KA4-LR

Rated Output Power: 15 kW

Rated Output Current: 41 A

Power Supply Voltage: 380 - 480 VAC, 3-Phase

Input Current Consumption: 31.8 A

Drive Power Consumption: 45 W

Control Method: Sine Wave PWM Control / Current Control

Positioning Resolution: 262,144 pulses/revolution

Communication Interface: RS-422

Regenerative Braking: 5 x Built-in Resistors, 10 Ω each

Dynamic Brake: Requires External Brake Unit

Cooling System: Forced Air Cooling (Fan)

Vibration Resistance: ≤ 5.9 m/s²

Protection Class: IP00 (Open Frame - must be installed in a protected enclosure)

Installation & Compatibility Notes

This drive must be installed inside a protective control cabinet (IP rating required by the machine). Ensure proper 3-phase 380-480VAC power supply and correct sizing of cables and fuses. It is designed to be paired with compatible Mitsubishi HC-KN, HA-FN, or similar series servo motors. The RS-422 interface connects to a motion controller or PLC for command and feedback. Adequate space for forced-air ventilation is critical for cooling.

Warranty & Shipping

This product is covered by a standard 12-month warranty. We ship globally using express courier services: FedEx, UPS, and DHL.

Professional FAQs

Q: What type of servo motor should I pair with this drive?

A: It is designed to work with Mitsubishi 200V/400V class servo motors from the J3 series, such as the HC-KN or HA-FN models. The motor capacity must match the 15kW drive rating.

Q: Why does it have an IP00 protection rating?

A> IP00 means it has no protection against dust or water. This is standard for high-power drives, which are always installed inside a sealed electrical cabinet (which provides the necessary IP rating for the machine).

Q: When is an external dynamic brake unit required?

A> An external brake unit is needed when the built-in regenerative resistors cannot dissipate the braking energy fast enough, such as in applications with very frequent stop/start cycles or high inertial loads.

Q: Can I use this drive in a single-phase power system?

A> No. This is strictly a 3-phase input drive (380-480VAC). Using it with single-phase power will damage the unit.

Q: What is the advantage of the high 262k pulse/rev resolution?

A> This high resolution allows for extremely fine control of motor position and speed, resulting in smoother motion, better surface finish in machining, and higher accuracy in positioning tasks.

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