Square D | PGA36040CU33A | Circuit Breaker | 400A | 3-Pole | 600V

Square D PGA36040CU33A Circuit Breaker is engineered for robust, high-current protection in industrial and commercial electrical systems. Delivering a 400A rating across a 3-pole design and a 600V rating, it provides reliable isolation and fast-trip performance to safeguard feeders and panel boards.

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V

Designed with retrofit, maintenance, and replacement in mind, this Square D circuit breaker integrates seamlessly where exact specs are required. Using the PGA36040CU33A part number as the primary reference ensures compatibility with existing Square D panels and distribution gear, helping you avoid mismatches and downtime.

Why it’s the right choice for demanding applications

• Reliable protection for high-current circuits. The 400A rating supports heavy feeders and critical loads in data centers, manufacturing lines, and large HVAC or power distribution setups.
• Three-pole configuration for balanced, three-phase protection. Ideal for systems that require coordinated protection across all phases.
• 600V operation. Suitable for medium- to high-voltage distribution panels commonly found in industrial facilities.
• Clear compatibility tracking. The exact part number PGA36040CU33A is the best reference when verifying fit against existing equipment.

Who benefits most from this circuit breaker includes facilities engineers, maintenance technicians, and panel assemblers working in industrial plants, data centers, or commercial electrical rooms that require dependable, code-aligned protection without compromising existing infrastructure.

Practical guidance for installation and use — before purchasing, confirm the fit and ratings align with your panel’s specifications. Use cases range from panel retrofits to complete equipment replacements where maintaining the same protection profile is crucial for system reliability and safety.

For best results, align the device with your current Square D ecosystem and reference the PGA36040CU33A part number to ensure seamless integration and consistent performance across your electrical distribution network.