Product Description
The ABB 125S1982-3 is a robust and reliable molded case circuit breaker designed for superior circuit protection in demanding industrial and commercial applications. This three-pole breaker, part of ABB's renowned SACE Isomax series, delivers a current rating of 125A and a high interrupting capacity, ensuring dependable performance under fault conditions. It features advanced thermal-magnetic trip units, providing precise and adjustable overload and short-circuit protection, minimizing downtime and equipment damage. The 125S1982-3 is engineered for easy installation and maintenance, with a compact design that maximizes panel space. It meets stringent international standards, guaranteeing safety and compliance, and is suitable for a wide range of applications, including motor control centers, power distribution boards, and OEM equipment.
Is Your Device Showing These Signs?
ABB 125S1982-3 failures often involve IGBT module degradation, capacitor bank ESR increase, and gate driver circuit malfunction. Rectifier bridge diode failures and DC link overvoltage trips are common. Resolving communication errors on the control board, addressing thermal management issues due to heatsink inefficiency, and correcting parameter drift in the protection circuitry are typical fixes. Firmware corruption requires reprogramming and resolver signal anomalies demand encoder replacement or adjustment.
Technical specifications
The ABB 125S1982-3 is a robust, three-pole molded case circuit breaker designed for reliable overcurrent and short-circuit protection in industrial and commercial power distribution systems. This breaker features a thermal-magnetic trip unit, providing instantaneous and inverse-time tripping characteristics to safeguard against both overload and fault conditions. It has a rated current of 125A and a maximum voltage rating of 600VAC, ensuring compatibility with a wide range of applications. The 125S1982-3 offers a high interrupting capacity, effectively clearing faults and minimizing equipment damage. It is constructed with durable, high-quality materials, guaranteeing long-term performance and dependability in demanding environments. Installation is straightforward, and the breaker is suitable for panelboard and switchboard mounting, offering versatility in system design.
Our Repair Process for the
125S1982-3
Our repair process for ABB 125S1982-3 failures begins with a comprehensive diagnostic assessment to pinpoint the root cause, focusing on IGBT module condition, capacitor bank ESR, and gate driver circuit functionality. Rectifier bridge diodes are tested, and DC link voltage is verified to be within specified limits. Control board communication errors are resolved through hardware repair or component replacement. Thermal management issues are addressed by optimizing heatsink performance. Protection circuitry parameters are recalibrated to factory specifications. Firmware corruption necessitates reprogramming with verified software. Resolver signal anomalies require encoder replacement or precise adjustment to ensure accurate feedback.
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.

















