- Monday - Friday 07:00 AM - 04:30 PM
The FA12100A Square D 1-Pole 100A circuit breaker is designed for reliable protection in residential and light commercial applications. Operating at 120/240V, this breaker ensures safe and efficient power management. Ideal for single-phase connections, it delivers quality performance and long-lasting durability to safeguard your electrical systems effectively.
The FA12100A belongs to Square D's FA molded-case frame series and is designed for commercial/light industrial Square D panelboards that accept FA-frame plug-in breakers. It is not interchangeable with QO or Homeline residential breakers. Send us your panel model number and we'll confirm whether this breaker is the right fit.
Square D's FA frame series is considered a legacy/obsolete line in many configurations. Northern Breaker Group specializes in hard-to-find and obsolete breakers — we maintain stock of FA-series breakers and can often source units that are no longer available through standard distribution channels. Contact us or visit one of our Calgary, Edmonton, or Vancouver counters for availability.
At 100A/1-Pole on a 120/240V system, this breaker is typically used as a branch or sub-feed protective device within a compatible FA-frame panelboard, not as a 2-pole main disconnect. Its suitability for a specific application depends on your panel's design and labelling. We recommend consulting a licensed electrician and confirming with your panel's documentation — our team is happy to help clarify if you share your panel details.
