Product Description
The Allen-Bradley 140G-MTF3-D60 molded case circuit breaker, an M-frame device weighing 26.68 pounds, provides reliable circuit protection up to 800 amps with adjustable thermal and magnetic trip settings, a 600-amp operational range, 1000V insulation, and 8kV impulse voltage withstand, ensuring robust performance and operational efficiency in demanding high-load industrial applications with a mechanical/electrical life of 120/60 operations per hour.
Is Your Device Showing These Signs?
The Allen Bradley 140G-MTF3-D60 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 involve contact erosion from repetitive high fault current interruptions, requiring replacement. Calibration drift in the electronic trip unit causes inaccurate protection, necessitating recalibration or replacement. Handle mechanisms become damaged, preventing proper breaker operation and requiring repair or replacement of the operating mechanism. Connectivity problems arise from loose terminal connections, leading to voltage drops and potential overheating; proper torque of terminal connections is essential.
Technical specifications
The Allen-Bradley 140G-MTF3-D60 is a robust 600-amp molded case circuit breaker (M-frame, 26.68 lbs) offering reliable circuit protection up to 800 amps. It features adjustable thermal and magnetic trip settings, 1000V insulation, 8kV impulse voltage withstand, and a mechanical/electrical life of 120/60 operations per hour, making it suitable for demanding high-load industrial applications.
Our Repair Process for the
140G-MTF3-D60
Our repair process for the Allen Bradley 140G-MTF3-D60 Molded Case Circuit Breaker begins with a thorough inspection to diagnose the specific issue, whether it be nuisance tripping, contact erosion, calibration drift, handle mechanism damage, or connectivity problems. Overload settings are verified and adjusted as needed, and thermal magnetic trip units are tested for proper function; malfunctioning units are replaced. Contacts exhibiting erosion are replaced to ensure reliable performance. Electronic trip units are recalibrated to factory specifications; units that cannot be recalibrated are replaced. Damaged handle mechanisms are repaired or replaced to restore proper breaker operation. Loose terminal connections are tightened to the specified torque to eliminate voltage drops and prevent overheating.
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.

















