ABB S3N125 Bolt-On Circuit Breaker

ABB S3N125 Bolt-On Circuit Breaker is a 3-pole, 125 A molded‑case protective device designed for bolt‑on mounting in ABB SACE S3N panel systems rated up to 600 V AC. This Type S3N breaker provides thermal‑magnetic overcurrent protection for three‑phase circuits, making it well suited for industrial power distribution, motor controllers, and panelboard feeders in commercial and light‑industrial environments. Key specifications include a 125 A current rating, 3 poles, and a 600 V maximum voltage, with a bolt‑on mounting arrangement that enables secure installation in compatible S3N enclosures. The S3N125 is part of ABB’s legacy SACE S3N family, offering dependable protection for 3‑phase circuits where compact, bolt‑on form factors are preferred in retrofit or new installations. Its straightforward, robust design supports standard electrical distribution tasks such as protecting feeders, MCCs, and branch circuits in harsh electrical environments, while maintaining compatibility with ABB's broader S3N lineup for coordinated protection across a facility.