Square D FC34040CBA 40A 3-Pole 480 V Circuit Breaker

Engineered for industrial reliability, the Square D FC34040CBA 40A 3-Pole 480 V Circuit Breaker is a purpose-built protector for three-phase power systems. With a genuine Square D part number FC34040CBA, it delivers targeted overcurrent protection at a 40 amp rating and is rated to operate in 480 V environments, making it a dependable choice for higher voltage distribution panels.

Key specifications

• Current rating: 40 A
• Poles: 3
• Voltage rating: 480 V
• Part number: FC34040CBA
• Brand: Square D

What this means for your electrical system

This 3-pole breaker is designed to protect three-phase circuits from overloads and short circuits, helping to prevent equipment damage and unplanned downtime. Its 480 V compatibility makes it suitable for industrial feeders, motor circuits, and distribution panels that operate at higher voltages. By selecting a genuine Square D FC34040CBA, you’re choosing a device built to align with the performance expectations of common FC-series panel configurations, ensuring predictable trip behavior and straightforward replacement in the field.

Ideal use cases

• Three-phase feeders in manufacturing lines and industrial facilities powered by 480 V systems
• Motor control circuits requiring 40 A protection in commercial or light-industrial environments
• Repairs or retrofits in Square D panels that specify FC-series breakers for compatibility and coordinated protection

Compatibility and installation tips

• Ensure the panel accepts FC-series breakers and that the FC34040CBA fits the intended slot configuration
• Install by a qualified electrician, following local electrical codes and the panel’s labeling guidelines
• Verify correct electrical clearance and secure mounting to maintain reliable protection and prevent nuisance trips
• Keep a spare FC34040CBA on hand to minimize downtime in critical facilities

Why choose this Square D breaker

Choosing the FC34040CBA means prioritizing compatibility, predictable performance, and long-term reliability in 480 V three-phase systems. It’s a genuine Square D component designed to integrate smoothly with FC-series panels, delivering consistent protection for essential equipment without the guesswork of cross-brand substitutes. If you’re upgrading or maintaining a 480 V distribution setup, this 40 A, 3-pole breaker offers a precise balance between protection and operational continuity.