Product Description
The Allen-Bradley 140U-JD3D3-D25 is a three-pole, JD-frame circuit breaker with a 250A continuous current rating and a fixed thermal trip. Its magnetic trip is adjustable, offering settings from 1250A to 2500A to suit various applications. This breaker, part of the Bulletin 140U series supporting both electronic (70-200A) and thermal-magnetic (15-800A) trip modules, is NEMA Size 5 and provides horsepower ratings of 150-200 HP at 575VAC, 125-150 HP at 460VAC, 100-125 HP at 380-415VAC, 60-75 HP at 230VAC, and 50-60 HP at 200VAC. It features a breaking capacity of 30-39kA and supports field-installable or factory-installed accessories. This compact breaker is ideal for main or branch circuit protection against short circuits, ground faults, and overloads in industrial panelboards or enclosures.
Is Your Device Showing These Signs?
The Allen Bradley 140U-JD3D3-D25 molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect overload settings or thermal magnetic calibration drift. Contact wear and degradation of the operating mechanism are frequent causes of failure, leading to breaker malfunction. Internal component failures within the solid-state trip unit, including the current sensors and microprocessor, result in inaccurate current sensing and protection. Environmental factors like humidity and temperature fluctuations accelerate corrosion on electrical contacts and compromise insulation integrity, necessitating replacement or refurbishment.
Technical specifications
The Allen-Bradley 140U-JD3D3-D25 is a 250A, three-pole circuit breaker with a fixed thermal trip and adjustable magnetic trip (1250A-2500A). Part of the Bulletin 140U series, it's a NEMA Size 5 breaker with horsepower ratings suitable for various voltage applications and a breaking capacity of 30-39kA. It's designed for main or branch circuit protection in industrial settings and supports accessories.
Our Repair Process for the
140U-JD3D3-D25
Our repair process for the Allen Bradley 140U-JD3D3-D25 molded case circuit breaker begins with a comprehensive visual inspection for physical damage, followed by electrical testing to diagnose the specific failure mode, including verification of trip settings and insulation resistance. The breaker is then disassembled, and all components are thoroughly cleaned and inspected for wear, corrosion, or damage. Worn or defective parts, such as contacts, operating mechanisms, and internal components of the solid-state trip unit, are replaced with new, OEM-approved parts. The solid-state trip unit is calibrated to factory specifications, and the breaker is reassembled, lubricated, and subjected to rigorous testing to ensure proper operation and adherence to all relevant standards. A final quality control check is performed before the breaker is certified for return 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.