Product Description
The Allen-Bradley 140U-D6D3-B20 is a 12 Amp, D-frame molded case circuit breaker from the 140U MCB series, offering a 65kA interrupting rating and a magnetic trip between 15 and 20 Amps. It's UL 489 compliant for global use, features a 100% rating up to 10 Amps, and is suitable for backfeeding at 240V and 480Y/277V. It includes IP20 terminal shields, an end cap kit for 3-phase connections, metric hardware, a padlock kit, and is designed as a flexible wire module for DIN rail mounting with separate contactor mounting. It also features electrical and mechanical interconnections with AC or DC coils, extension shaft support for alignment, and a load terminal cover for front mount auxiliary contact compliance.
Is Your Device Showing These Signs?
The Allen Bradley 140U-D6D3-B20 molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect overload settings or thermal magnetic trip unit malfunction. Field failures often stem from contact erosion, arc chute damage, or a defective operating mechanism, leading to breaker failure. Diagnose these problems through insulation resistance testing, contact resistance measurement, and a thorough visual inspection for signs of overheating or mechanical damage. Replacement of the entire breaker is often necessary when internal components degrade beyond repair, ensuring proper circuit protection and preventing electrical hazards.
Technical specifications
The Allen-Bradley 140U-D6D3-B20 is a 12 Amp circuit breaker (140U MCB series) with a high interrupting rating (65kA) and a magnetic trip between 15-20 Amps. It's UL 489 compliant, can handle 100% of its rated current up to 10 Amps, and supports backfeeding at specific voltages. It comes with various accessories like terminal shields, an end cap kit, metric hardware, and a padlock kit, and is designed for DIN rail mounting with flexible wiring options. It also offers features for electrical/mechanical interconnections, shaft support, and a load terminal cover.
Our Repair Process for the
140U-D6D3-B20
Our repair process for the Allen Bradley 140U-D6D3-B20 molded case circuit breaker begins with a comprehensive diagnostic evaluation. This includes insulation resistance testing, contact resistance measurement, and a detailed visual inspection to identify any signs of overheating, mechanical damage, contact erosion, or arc chute impairment. If the inspection reveals that internal components are degraded, or if the thermal magnetic trip unit is malfunctioning, the entire breaker is replaced. This ensures optimal circuit protection and eliminates potential electrical hazards associated with compromised or irreparable components.
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