Schneider Electric MG24455 Molded Case Circuit Breaker

Schneider Electric MG24455 is a two‑pole molded‑case circuit breaker from the Square D/Merlin Gerin lineage, designed for DIN‑rail panels and industrial distribution. It provides 40 A of overcurrent protection with thermal‑magnetic trip action for circuits fed from 480Y/277 VAC networks and a 125 VDC rating for control circuits, making it suitable for mixed‑voltage applications in commercial and light industrial environments. The MG24455 carries a C‑curve trip characteristic and a short‑circuit interrupting rating of 5 kA, with UL 1077 compatibility for supplemental protection in appropriate panel builds. This compact 2P unit is intended for DIN rail mounting and is commonly used to protect branch circuits in control cabinets, machine frames, and power distribution enclosures operating at 480Y/277 VAC or up to 125 VDC. As part of Schneider Electric’s legacy MG/Merlin Gerin family, it sits alongside Square D offerings to deliver robust, dependable protection in demanding electrical installations.