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Product Description
The Mitsubishi MR-J3-DU45KA4 servo amplifier provides dependable motor control with a 323VAC, 131A 3-phase output, powered by the converter unit. It requires a 380-480VAC single-phase control power supply (0.2A, 45W, 50/60Hz) and offers a 24VDC (0.3A, 10%) interface power supply. Utilizing sine-wave PWM and current control, it handles voltage fluctuations (323-528VAC, +/-5% frequency). The IP00-rated, fan-cooled open design weighs 26 kg.
Is Your Device Showing These Signs?
The Mitsubishi MR-J3-DU45KA4 servo drive commonly experiences issues such as overcurrent faults stemming from shorted motor windings or IGBT failures, requiring replacement of the power module. Communication errors arise due to damaged encoder cables or faulty CN1 connectors, necessitating cable replacement or connector repair. Overheat alarms occur because of inadequate cooling or a malfunctioning heatsink fan, demanding improved ventilation or fan replacement. Parameter corruption leads to erratic motor behavior, fixed by reloading the correct parameters via MR Configurator software. Finally, position deviation errors result from incorrect gain adjustments or a damaged encoder, solved through proper gain tuning or encoder replacement.
Technical specifications
The Mitsubishi MR-J3-DU45KA4 servo amplifier features a 323VAC, 131A 3-phase output, requires a 380-480VAC single-phase control power supply, and offers a 24VDC interface power supply. It uses sine-wave PWM and current control, tolerates voltage fluctuations, and has an IP00-rated, fan-cooled open design weighing 26 kg.
Our Repair Process for the
MR-J3-DU45KA4
Our repair process for the Mitsubishi MR-J3-DU45KA4 servo drive begins with a comprehensive fault diagnosis to pinpoint the root cause of the issue. Overcurrent faults require immediate power module replacement. Communication errors are resolved through encoder cable replacement or CN1 connector repair. Overheat alarms necessitate improved ventilation or heatsink fan replacement. Parameter corruption is rectified by reloading the correct parameters via MR Configurator software. Position deviation errors are corrected through proper gain tuning or encoder replacement. Each repair concludes with rigorous testing to ensure the servo drive operates within specified parameters and to prevent future failures.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
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Ships from Rochester, NY