Square D by Schneider Electric LA400S Surface Circuit Breaker

The Square D by Schneider Electric LA400S is a 3-space, surface-mount circuit breaker enclosure designed for indoor use in a NEMA 1 enclosure, built to house Square D LA/LH molded‑case breakers in the 125–400 A range with a maximum of 400 A in a single cabinet. It features a rugged steel body with a gray powder-coated finish and precise outer dimensions of 15.28 in wide by 44.48 in high by 6.5 in deep, optimizing wall‑mounted installations where a compact footprint is required. As part of the LA family, the LA400S uses an L‑frame design compatible with the corresponding breakers, delivering a dedicated housing for three circuits in commercial or light‑industrial distribution scenarios. The surface‑mount configuration simplifies installation in spaces with limited depth, while the indoor, NEMA 1 rating provides protection against ordinary dust and non‑corrosive elements, making it suitable for main‑disconnect or feeder applications within the 125–400 A range.