Federal Pacific NN631100STN-5 Circuit Breaker, 100A, 3-Pole

Federal Pacific NN631100STN-5 Circuit Breaker is a rugged 100A, 3-pole device engineered for industrial electrical service, maintenance, and replacement projects. Frequently associated with the Lok series, this breaker delivers dependable overload protection for multi‑phase power systems in manufacturing floors, warehouses, and other demanding environments. To ensure you’re selecting the exact part for your setup, verify compatibility with the NN631100STN-5 part number against your application requirements.

Key features and benefits

• 3-pole design provides balanced protection for 3‑phase circuits, helping safeguard motors and other multi‑phase equipment.
• 100 A rating offers solid protection for feeders and connected equipment from overload conditions.
• Lok-series compatibility supports straightforward replacement in panels designed for the Lok family.
• Industrial-grade construction built to withstand frequent cycling and the rigors of tough work environments.
• Clear compatibility reference use the NN631100STN-5 part number to confirm fit; if you need help matching a part number to your panel, we can assist with compatibility checks.

Ideal use cases

• Replacing a failing or aged breaker in Lok-series panels to restore reliable protection quickly.
• Protection for 3‑phase motor circuits found in conveyors, pumps, compressors, and other industrial equipment.
• Stocking a spare for maintenance crews servicing facilities that utilize Federal Pacific Lok systems.
• New installations or retrofits where a 3‑pole, 100A protection device is required within Lok-compatible infrastructure.

How to verify compatibility and installation tips

Compatibility in electrical systems hinges on more than amperage and number of poles. Always cross-check the NN631100STN-5 part number against your panel’s documentation and the intended application. If you’re unsure, we’re here to help confirm fit and suggest the best match for your Lok-series configuration. Using the correct part number helps prevent mismatches and minimizes downtime during maintenance or replacement projects.

Choose this breaker when you need a direct, reliable replacement in Lok-series panels or when stocking a dependable 3‑pole, 100A protection device for industrial services. It’s the practical, compatible choice for facilities prioritizing consistent performance and straightforward installation within Federal Pacific Lok systems.