Square D | PLA34040CU63AE1 | Circuit Breaker | 400A | 3-Pole | 480V

Unlock reliable power distribution with the Square D PLA34040CU63AE1 circuit breaker—a 400A, 3-pole device designed for 480V three-phase systems. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker ensures your panel stays protected and compliant with Square D standards.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 480V
• Part number: PLA34040CU63AE1
• Brand: Square D

Why this model stands out

• Precise compatibility: The PLA34040CU63AE1 is the best reference for matching Square D panels in need of a 400A, 3-pole 480V circuit breaker.
• Robust 3-pole design: Ideal for distributing power in three-phase systems, supporting balanced protection across each leg.
• Reliability-driven for industrial use: Engineered to maintain consistent protection for critical feeders in commercial and manufacturing environments.
• Clear fit guidance: Use the part number as your compatibility anchor to minimize ordering errors and downtime.

Ideal use scenarios

• Replacing a failed or obsolete breaker in 480V, 3-phase panels where a 400A protection device is required.
• Retrofit projects that upgrade existing equipment to higher protection levels without changing the panel architecture.
• Maintenance inventories for facilities with heavy electrical loads, ensuring quick swaps to minimize production interruptions.

Installation & compatibility tips

Before ordering and installation, confirm fit and ratings—the part number PLA34040CU63AE1 is your best reference for compatibility. Check the panel model and bus configuration to ensure seamless integration with your Square D distribution system. Follow standard electrical safety practices, including lockout/tagout procedures, when handling high-current equipment.

Designed for professionals who demand precise, dependable protection at 480V, this Square D circuit breaker helps keep critical equipment safe while simplifying maintenance and retrofit workflows. Add it to your cart to ensure fast, accurate replacements in your 3-phase electrical infrastructure.