Square D LGL36400U44X 400A 3P 600V Circuit Breaker | AmpState

Square D LGL36400U44X is a robust 400 A, 3-pole, 600 V circuit breaker engineered for reliable circuit protection in panelboards, load centers, and electrical distribution systems. Built for everyday electrical work, this unit is a smart choice when you need a dependable, on-spec replacement that keeps downtime to a minimum.

Key benefits that matter in the field

• Three-pole design for three‑phase systems—ideal for protecting feeders and main circuits in commercial and industrial panels operating up to 600 V.
• 400 A rating provides solid protection for high-demand circuits without nuisance trips in demanding environments.
• Direct part-number match—LGL36400U44X ensures precise compatibility, simplifying procurement and installation while meeting code expectations.
• Authentic Square D performance across panelboards, load centers, and distribution gear, helping you maintain system reliability and safety.
• Availability from AmpState means ready-to-ship stock and straightforward reordering for maintenance and spares.

Who benefits from this breaker

• Maintenance teams focused on uptime who need a dependable, on-spec replacement part.
• Panel builders and electrical contractors seeking accurate, code-compliant components that fit exact specifications.
• Facilities managers and inventory planners stocking spare parts to minimize outage time and expedite repairs.

Practical use cases

Use this breaker to protect three-phase distribution circuits in commercial or industrial environments, whether you’re replacing a failed unit, upgrading a panel to meet current load demands, or stocking a reliable spare for fast turnarounds on service calls.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.