Product Description
The Allen-Bradley 140U-K6D3-D35 is a 3-pole, 480V, 350A K-Frame Molded Case Circuit Breaker (MCCB) with a 65kA interrupting current, providing fixed thermal/adjustable magnetic (T/M) protection against overload, short-circuit, and ground fault in branch and main circuit applications like enclosures, panelboards, and switchboards. It meets IEC 157-1, UL489, CSA 22.2 No.5, KEMA-KEUR, CCC, and CE standards, and is certified for CCC, CE Mark, CSA, and UL, making it suitable for IE3 Motors (IEC 60034-30). This circuit breaker has a mechanical life of 20,000 operations (or 120 operations per hour) and an electrical lifespan of 60 operations per hour at 415V AC, and is designed for a 350A current rating and 65kA breaking capacity. Available accessories include terminal shields, operating mechanisms, handles, barriers, padlock kits, lugs, and end caps. It operates without derating at 40C (104F) and can be stored between -40C and 80C (-40F and 176F), with dimensions of 140 x 108.5 x 205 mm.
Is Your Device Showing These Signs?
The Allen Bradley 140U-K6D3-D35 molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect trip settings or thermal overload. Field failures often stem from contact erosion, arc chute damage, or spring mechanism fatigue, leading to breaker malfunction. Diagnose these problems by inspecting the breaker for physical damage, verifying proper installation torque, and performing insulation resistance tests. Replacement is necessary when the breaker fails to reset or exhibits persistent tripping after addressing external factors.
Technical specifications
The Allen-Bradley 140U-K6D3-D35 is a 3-pole, 350A molded case circuit breaker (MCCB) designed for protecting circuits up to 480V. It offers fixed thermal/adjustable magnetic protection against overloads, short circuits, and ground faults, with a 65kA interrupting current. It's suitable for various applications and complies with multiple international standards and certifications (IEC, UL, CSA, KEMA-KEUR, CCC, CE). It's rated for IE3 motors and has a specified mechanical and electrical lifespan. A range of accessories are available, and it operates without derating at 40C.
Our Repair Process for the
140U-K6D3-D35
Our repair process for the Allen Bradley 140U-K6D3-D35 molded case circuit breaker begins with a thorough inspection for physical damage, verification of proper installation torque, and insulation resistance testing to diagnose the root cause of any issues. Nuisance tripping is addressed by confirming correct trip settings and investigating potential thermal overloads. Field failures related to contact erosion, arc chute damage, or spring mechanism fatigue are carefully evaluated. If the breaker fails to reset or continues to trip after addressing external factors and internal component issues, replacement of the unit is required.
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.