Square D 9999CLM2 U Three Phase Circuit Breaker

The Square D 9999CLM2 U is a MAG-GUARD current-limiting module engineered for three-phase, 600 V systems and designed to work with FA-series molded-case circuit breakers. This unit-mount accessory is rated for 15 A or 30 A and supports three-pole configurations, enabling MAG-GUARD current-limiting protection when paired with compatible FA breakers. Identified by part number 9999CLM2 U, the module integrates with Square D MAG-GUARD circuitry and FA family devices to provide an added layer of protection in industrial electrical distributions. Applications include 3P 600 V distribution panels, panel boards, and switchgear in commercial or light-industrial environments where limiting fault energy and improving interrupt performance are beneficial. This accessory is part of Square D's Schneider Electric portfolio, compatible with existing FA breakers to maintain coordinated protection across three-phase circuits.