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Product Description
The Allen-Bradley 140G-MTH3-D80 is a robust and reliable 800 Amp molded case circuit breaker, utilizing electronic LSI technology to provide accurate fault response, system integrity, and advanced safety features for demanding industrial circuits up to 1000 Volts, withstanding 8 kV impulse voltages and offering a mechanical/electrical life of 120/60 operations per hour.
Is Your Device Showing These Signs?
The Allen Bradley 140G-MTH3-D80 molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect overload settings or thermal magnetic trip unit malfunction. Field failures are often attributed to contact erosion from repetitive high fault current interruptions, requiring replacement of the breaker. Connectivity problems arise from loose terminal connections or damaged bus bar adapters, leading to voltage drops and potential overheating. Calibration drift in the trip unit necessitates functional testing and recalibration to ensure proper protection. Environmental factors like humidity and temperature fluctuations accelerate degradation, shortening the breaker's operational lifespan.
Technical specifications
The Allen-Bradley 140G-MTH3-D80 is a durable 800 Amp circuit breaker designed for industrial circuits up to 1000V. It uses electronic LSI technology for accurate fault response, system integrity, and safety, and can withstand 8 kV impulse voltages with a mechanical/electrical life of 120/60 operations per hour.
Our Repair Process for the
140G-MTH3-D80
Our repair process for the Allen Bradley 140G-MTH3-D80 molded case circuit breaker begins with a thorough inspection to diagnose nuisance tripping, contact erosion, connectivity problems, calibration drift, and environmental degradation. Overload settings are verified and adjusted to eliminate incorrect tripping. The thermal magnetic trip unit undergoes rigorous functional testing and recalibration to guarantee accurate protection. Eroded contacts are addressed through refurbishment or component replacement. Terminal connections are tightened, and damaged bus bar adapters are replaced to eliminate voltage drops and overheating. The breaker is then subjected to environmental testing to ensure resilience against humidity and temperature fluctuations, extending its operational lifespan. Finally, the repaired breaker undergoes comprehensive performance testing to validate adherence to original specifications before it is returned to service.
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