Square D | PGA36040CU31A | Circuit Breaker | 400A | 3-Pole | 600V | Plug-In

Square D PGA36040CU31A is a plug-in circuit breaker engineered for robust overcurrent protection in demanding electrical distributions. With a 400A rating, a 3-pole configuration, and a 600V maximum, this unit delivers reliable protection for industrial panels and is specifically suited for maintenance, retrofit, and replacement projects that require exact specifications.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Connection type: Plug-In
• Part reference: PGA36040CU31A

Why this exact part matters

Using the precise PGA36040CU31A ensures your electrical system preserves its intended protection characteristics and matches the design of compatible Square D panels. The plug-in design is tailored for quick, reliable replacement in facilities that rely on high-current, three-phase protection without sacrificing compatibility or safety.

Ideal use cases

• Routine maintenance on existing Square D installations that require plug-in breakers
• Retrofit projects to upgrade panel capacity or improve protection coverage
• Replacement for damaged or worn-out breakers in 3-Pole, 600V systems

Installation and compatibility notes

Before ordering, confirm fit and ratings for your specific panel model. The part number PGA36040CU31A is the best reference for compatibility, helping you avoid mismatches and ensuring seamless integration with your electrical system.

Practical considerations and benefits

With a 400A capacity, this plug-in breaker supports large-load circuits common in industrial settings, manufacturing equipment, and other high-demand applications. The 3-pole design suits 3-phase service, delivering balanced protection across all phases. This is a purpose-built replacement part for Square D panels, designed to minimize downtime during upgrades or repairs and to simplify ordering with a single, unambiguous part reference.