Square D LA26400AC I-Line Circuit Breaker 400A 600V

Square D LA26400AC I-Line Molded‑Case Circuit Breaker is a 400 A, 600 V AC two‑pole, single‑phase device from the LA series designed for protection and control of feeders in Square D I‑Line panelboards. As a Thermal‑Magnetic MCCB, it provides Long‑Time and Instantaneous trip functions and plugs directly into I‑Line buses for quick installation and secure connections. The unit carries a 22 kA interrupting rating at 600 VAC (and a 250 VDC rating), making it suitable for feeders and main‑line protection in commercial and light industrial distribution systems. UL and CSA listings accompany the LA26400AC, reflecting its intended use in rugged electrical installations while maintaining compatibility with standard 2P, 1PH I‑Line configurations. Designed by Square D (Schneider Electric) as part of the Type LA family, this plug‑in MCCB is engineered for reliable protection in service equipment and distribution panels across industrial environments. Its rugged molded‑case construction, compatible mounting, and established performance ratings make it a practical replacement in existing LA‑series installations that require 400 A at 600 V with 22 kA interrupting capacity.