Product Description
The Mitsubishi MR-H40AN-UE, a 0.4kW servo amplifier from the MELSERVO MR-H series, uses 200-230VAC 3-phase input and features an integrated dynamic brake. It employs sine-wave PWM and current control for precise motor management, achieving a speed frequency response of 250Hz. Operating from 0-55C (storage: -20-65C), it's self-cooled and tolerates 170-253VAC voltage fluctuations. Compliant with EN, C-UL, and UL standards, this IP00-rated amplifier supports HA-FH, HA-LH, HA-MH, HA-SH, HA-UH, HC-MF, HA-FF, HC-RF, HC-SF, and HC-UF servo motors.
Is Your Device Showing These Signs?
The Mitsubishi MR-H40AN-UE servo amplifier commonly experiences issues such as overcurrent faults stemming from shorted motor windings or IGBT failures within the power module. Communication errors arise from damaged encoder cables or faulty RS-422/RS-485 interfaces on the control board. Overheating problems are traced to inadequate cooling fan operation or a blocked heatsink, leading to thermal overload trips. Parameter corruption in the EEPROM necessitates reprogramming with the correct motor and system settings. Power supply failures, specifically capacitor degradation, result in undervoltage alarms and prevent proper servo operation.
Technical specifications
The Mitsubishi MR-H40AN-UE is a 0.4kW MELSERVO MR-H series servo amplifier (200-230VAC 3-phase input) with a dynamic brake, sine-wave PWM, and 250Hz speed frequency response. It operates from 0-55C, is self-cooled, tolerates 170-253VAC fluctuations, and complies with EN, C-UL, and UL standards (IP00). It supports various HA and HC series servo motors.
Our Repair Process for the
MR-H40AN-UE
Our repair process for the Mitsubishi MR-H40AN-UE servo amplifier begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the failure, focusing on common issues such as overcurrent faults, communication errors, overheating, parameter corruption, and power supply failures. We thoroughly inspect motor windings, IGBTs, encoder cables, communication interfaces, cooling systems, and power supply components. Faulty components are replaced with genuine Mitsubishi parts or equivalent high-quality replacements. The EEPROM is reprogrammed with verified parameters. The amplifier undergoes rigorous testing under load conditions to ensure it meets original performance specifications. Finally, the repaired unit is cleaned, and a detailed repair report is provided, documenting the work performed and the components replaced.
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