Square D MG24430 Supplementary Protector Breaker

Square D MG24430 Supplementary Protector Breaker is a 1‑pole, 6‑amp circuit breaker designed for 277 VAC circuits in DIN‑rail panels, part of Schneider Electric’s Multi9 C60 UL1077 family. As a supplementary protector, it provides localized overcurrent protection for branch circuits alongside a main device, and is commonly used in commercial or industrial control panels to safeguard feeders and auxiliary loads while conserving space. This model features a thermal‑magnetic trip with a C‑curve characteristic and is UL 1077‑listed with a 5 kA short‑circuit interrupt rating at 277 VAC, supporting reliable fault isolation in typical 277 VAC distribution. The MG24430 is designed for easy DIN‑rail mounting, compatible with other Multi9 components, and is catalogued in listings that reference BIN434. With its 1P 6A rating and 277 VAC operation, it is well suited for protecting low‑current control circuits, lighting feeders, or small equipment feeds in systems that run on 277 VAC, while meeting the required protection levels for many building automation and commercial applications.