Product Description
The Mitsubishi MR-J3-70A-KE003 is a 0.75 kW, 200V AC servo amplifier designed for efficient industrial automation, featuring sine wave PWM control, a dynamic brake, and operational stability within AC200-230V (50/60 Hz, 5% fluctuation) and 0-55C ambient temperatures.
Is Your Device Showing These Signs?
The Mitsubishi MR-J3-70A-KE003 servo amplifier commonly fails due to capacitor degradation within the power supply, causing undervoltage faults and erratic motor behavior. Overcurrent faults are frequently traced to shorted IGBTs in the inverter section, often resulting from excessive load or improper motor tuning. Communication errors arise from damaged encoder feedback circuits or corrupted firmware, necessitating EEPROM replacement or firmware reflashing. Overheating issues stem from a malfunctioning cooling fan or blocked heatsink, leading to thermal shutdowns and component stress. Repair includes component-level replacement, comprehensive testing, and drive parameter configuration to restore optimal performance.
Technical specifications
Mitsubishi MR-J3-70A-KE003: 0.75kW, 200V AC servo amplifier for industrial automation, with sine wave PWM control, dynamic brake, and stable operation in AC200-230V and 0-55C.
Our Repair Process for the
MR-J3-70A-KE003
Our repair process for the Mitsubishi MR-J3-70A-KE003 servo amplifier begins with a thorough evaluation to pinpoint the failure. Capacitor degradation within the power supply is addressed through component-level replacement, resolving undervoltage faults and erratic motor behavior. Overcurrent faults are rectified by replacing shorted IGBTs in the inverter section, ensuring proper motor operation. Communication errors are corrected by repairing damaged encoder feedback circuits or replacing the EEPROM and reflashing the firmware. Overheating issues are resolved by repairing or replacing the cooling fan and ensuring the heatsink is clear of obstructions. The repair concludes with comprehensive testing and precise drive parameter configuration to guarantee optimal performance.
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
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY