Square D FY14040C 40A 1P 277V Circuit Breaker | AmpState

The Square D FY14040C is a 40A, 1-pole, 277V circuit breaker designed to deliver reliable overcurrent protection for panelboards, load centers, and electrical distribution systems. Built by Square D, this unit is a dependable choice for retrofit work and ongoing maintenance where keeping the exact part number matters for compatibility and stock consistency.

• Amperage: 40 A
• Poles: 1 Pole
• Voltage: 277 V
• Manufacturer: Square D
• Part Number: FY14040C
• Type: Circuit Breaker
• Applications: Panelboards, Load Centers, Electrical Distribution
• Availability: AmpState

This FY14040C delivers targeted protection where commercial and industrial circuits operate at 277V. Its single-pole design is ideal for branch circuits and lighting feeders, helping prevent damage from overloads and short circuits while keeping electrical systems running smoothly.

What makes this unit stand out

• Designed for seamless integration with Square D panelboards and load centers, ensuring reliable compatibility in retrofits and service upgrades.
• Part-number consistency supports maintenance planning and inventory management, reducing downtime when replacements are needed.
• Compact, straightforward replacement approach for scenarios where 277V single-pole protection is required, without sacrificing safety or performance.

Who should consider the FY14040C

• Facility managers and electricians working on retrofit projects that require exact part-number compatibility.
• Maintenance teams stocking spare breakers for commercial electrical distribution systems operating at 277V.
• contractors handling installations or upgrades in panelboards and load centers that rely on Square D components.

Use cases and practical scenarios

• Retrofit installations where a proven Square D 277V solution is needed without reconfiguring existing protection schemes.
• Spare-part inventories for service fleets that support 277V lighting and general-purpose circuits in commercial buildings.
• Maintenance planning for buildings with legacy Square D gear that requires consistent part numbers during replacements.

Compatibility and support

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

Installation and care tips

• Always shut off power at the main disconnect before replacement or installation.
• Verify that the panelboard or distribution equipment is designed for 277V and supports a 1-pole, 40A breaker.
• Follow manufacturer installation guidelines and local electrical codes for safe, compliant upgrades.
• Regularly inspect the breaker and surrounding components for signs of wear or overheating, and replace if any damage is observed.