Product Description
The Allen-Bradley 140G-R12I4-E30-Z1, a robust 4-pole molded case circuit breaker from the 140G MCB series, is designed for industrial applications, offering electronic LSIG protection, a 2500-3000 Amp current range, a 125 kA interrupting rating, 1000V insulation voltage, 12 kV impulse withstand, and a durable build with a mechanical/electrical life of 60 operations per hour, weighing 175 pounds for reliable electrical system protection.
Is Your Device Showing These Signs?
The Allen Bradley 140G-R12I4-E30-Z1 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, requiring replacement of the breaker to maintain proper short-circuit protection and prevent electrical faults. Calibration drift within the solid-state trip unit also occurs, leading to inaccurate current sensing and protection, necessitating recalibration or component replacement. Furthermore, damage to the operating mechanism hinders proper breaker operation, demanding repair or replacement of the affected components to ensure reliable circuit interruption.
Technical specifications
The Allen-Bradley 140G-R12I4-E30-Z1 is a heavy-duty 4-pole circuit breaker for industrial use, featuring electronic LSIG protection, a 2500-3000 Amp range, a 125 kA interrupting rating, and high insulation and impulse withstand capabilities. It's built for long life and weighs 175 pounds.
Our Repair Process for the
140G-R12I4-E30-Z1
Our repair process for the Allen Bradley 140G-R12I4-E30-Z1 molded case circuit breaker begins with a comprehensive evaluation to pinpoint the root cause of the malfunction, whether it be nuisance tripping, contact erosion, calibration drift, or operating mechanism damage. We address nuisance tripping by verifying and correcting overload settings, or replacing the thermal magnetic trip unit if necessary. Contact erosion requires complete breaker replacement to guarantee short-circuit protection. Calibration drift is rectified through meticulous recalibration of the solid-state trip unit or replacement of faulty components. Damage to the operating mechanism necessitates repair or replacement of the specific components to restore reliable circuit interruption. Each repair concludes with rigorous testing to confirm adherence to original performance specifications, ensuring optimal functionality and safety.
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