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Product Description
The Allen-Bradley/Rockwell Automation 140U-K0D3-D20 is a 400 Amp, 200-600 Volt, 50 Hertz thermal-magnetic circuit breaker designed to protect equipment from overcurrent, undercurrent, and short-circuit conditions. Part of the Frame K, 140U series, this three-pole breaker with a thermal and magnetic trip unit can be installed in any position and used alone or in series for enhanced protection. Its interrupting rating varies with voltage, and its performance is affected by exceeding recommended environmental conditions, including temperature (40C at full rating, up to 75C derated) and altitude. Proper environmental specification is crucial for optimal protection.
Is Your Device Showing These Signs?
The Allen Bradley 140U-K0D3-D20 molded case circuit breaker commonly experiences issues related to nuisance tripping caused by incorrect overload settings or thermal magnetic trip unit malfunction. Field failures often stem from contact erosion due to repetitive high fault current interruptions, requiring breaker replacement. Calibration drift in the electronic trip unit leads to inaccurate protection and necessitates recalibration or unit replacement. Environmental factors such as excessive ambient temperature or humidity accelerate degradation, resulting in premature failure of internal components and compromised breaker performance. Connectivity problems arise from loose terminal connections or damaged bus bar interfaces, demanding immediate attention to prevent arcing and potential system damage.
Technical specifications
The Allen-Bradley 140U-K0D3-D20 is a 400 Amp circuit breaker that protects equipment from overcurrent, undercurrent, and short circuits. It's a three-pole breaker from the 140U series, designed for 200-600 Volt, 50 Hertz systems. It can be installed in any position and used alone or in series, but its performance depends on staying within specified temperature and altitude limits.
Our Repair Process for the
140U-K0D3-D20
Our repair process for the Allen Bradley 140U-K0D3-D20 molded case circuit breaker begins with a comprehensive inspection to identify the root cause of the failure, focusing on nuisance tripping, contact erosion, calibration drift, environmental degradation, and connectivity problems. Overload settings are verified and adjusted as needed, and the thermal magnetic trip unit is thoroughly tested for malfunctions, with replacement performed if necessary. Contact surfaces are examined for erosion, and breakers with significant damage are replaced to ensure reliable operation. Electronic trip units undergo recalibration to restore accurate protection, or are replaced if recalibration is not feasible. Internal components are inspected for signs of degradation due to environmental factors, and damaged parts are replaced to restore breaker performance. Terminal connections and bus bar interfaces are tightened or repaired to eliminate connectivity problems and prevent arcing.
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