Square D by Schneider Electric FA14100A Circuit Breaker

The Square D by Schneider Electric FA14100A is a gray‑label, 1‑pole molded‑case circuit breaker rated 100 A for 480Y/277 VAC service. Designed for use in Square D I‑Line panelboards, this device employs a thermal‑magnetic trip to protect single‑phase feeders from overloads and short circuits, with an 18 kA interrupt rating at the 480Y/277 VAC level. It accepts 14–1/0 AWG aluminum or copper conductors on the line and load sides, making it suitable for feeder protection in commercial or light industrial 277 V distributions. As part of the FA family, the FA14100A provides precise overcurrent protection for circuits feeding lighting, conveyors, or other 277 V loads within 3‑phase 480Y/277 V systems, helping maintain clear labeling and system reliability in panel installations.