Square D SN12125 Circuit Breaker, 125A, 3-Pole

The Square D SN12125 Circuit Breaker is a rugged, three‑pole solution built for demanding industrial environments. With a 125 A rating, this breaker delivers reliable overcurrent protection for three‑phase circuits, making it ideal for heavy equipment feeders, large motors, and critical process lines. Use SN12125 in industrial service, maintenance, or replacement projects where dependable, code‑compliant protection is essential. Verify fit by part number and application requirements to ensure seamless integration into your system.

• 125 A rating provides solid protection for substantial loads without nuisance trips in standard operating conditions.
• 3 poles design supports three‑phase circuits, simplifying integration in commercial/industrial panels and distribution equipment.
• Part number SN12125 as the definitive identifier to confirm compatibility with your application and existing Square D components.
• Industrial reliability crafted for frequent switching, panelboard replacements, and service upgrades in manufacturing, processing, and facilities environments.

Ideal use cases

• Replacing aging or failed breakers in service panels, switchgear, and motor control centers.
• Upgrading electrical infrastructure to support larger three‑phase loads in manufacturing lines, conveyors, and HVAC systems.
• Installing new three‑phase feeders for heavy equipment where consistent protection is required.

Notes: Verify fit by part number and application requirements. Need help matching a part number or confirming compatibility? Message us and we'll help.