Product Description
The Allen-Bradley 140G-J0F4-D10 is a robust, four-pole molded case circuit breaker with a J frame, providing adjustable thermal-magnetic protection and capable of handling up to 250 amps. It offers reliable electrical system protection with a 100kA interrupting rating, 100 amp current range, 1000V insulation voltage, and 8kV impulse withstand, weighing 7.72 pounds and designed for long-term performance with a mechanical life of 240 operations per hour and an electrical life of 120 operations per hour.
Is Your Device Showing These Signs?
The Allen Bradley 140G-J0F4-D10 molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect overload settings or thermal magnetic trip unit malfunction. Contact wear and degradation from repetitive switching operations reduce the breaker's interrupting capacity. Internal component failure within the electronic trip unit causes communication errors or prevents proper operation. Inspect the breaker for loose connections, damaged insulation, and ensure proper torque on all terminals to mitigate these problems. Replacement of the entire breaker is often required when these faults are identified.
Technical specifications
The Allen-Bradley 140G-J0F4-D10 is a durable, 4-pole circuit breaker (J frame) offering adjustable thermal-magnetic protection for electrical systems. It handles up to 250 amps, has a 100kA interrupting rating, and is designed for long-term use with specified mechanical and electrical operation lifespans. Key specs include 100 amp current range, 1000V insulation voltage, and 8kV impulse withstand. It weighs 7.72 pounds.
Our Repair Process for the
140G-J0F4-D10
Our repair process for the Allen Bradley 140G-J0F4-D10 molded case circuit breaker begins with a thorough inspection for loose connections, damaged insulation, and verification of proper terminal torque. Suspected nuisance tripping necessitates a review of overload settings and an evaluation of the thermal magnetic trip unit. Contact wear and degradation are assessed to determine the breaker's interrupting capacity. Electronic trip unit malfunctions are diagnosed to identify internal component failures causing communication errors or operational impediments. Confirmed faults mandate complete breaker replacement to ensure system safety and reliability.
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.

















