Square D FYB14015A 14015A 1-Pole 277 V Circuit Breaker

Meet the Square D FYB14015A 1-Pole 277 V Circuit Breaker — a compact, single-pole protective device designed for 277-volt circuits in commercial and light-industrial panels. With Part Number FYB14015A, this breaker is built to deliver dependable overcurrent protection for a single live conductor while integrating seamlessly into Square D panel configurations that accept FY-type breakers.

Key use cases

Commonly deployed on 277 V lighting circuits, control panels, and other 277 V loads in offices, retail spaces, schools, and warehouses. The 1-pole design is ideal for isolating and protecting a single branch circuit, simplifying troubleshooting and panel organization.

Specifications at a glance

• Brand: Square D
• Part Number: FYB14015A
• Current rating: 14015 A
• Poles: 1
• Voltage rating: 277 V

Why this matters

In spaces where 277 V lighting or equipment runs, a dedicated single-pole breaker like the FYB14015A prevents overloads on a single circuit, reduces the risk of damage to wiring, and contributes to safer, more reliable power distribution. Using the exact FYB-series model ensures compatibility with existing Square D panels and simplifies replacement during maintenance windows.

Installation and care tips

• Verify panel compatibility: this breaker is designed for Square D panels that accept FYB-type devices.
• Turn off main power and confirm de-energization before replacement or service.
• Keep a spare FYB14015A on-site for quick replacements to minimize downtime on critical 277 V circuits.

Who benefits most

Facilities managers, building engineers, electrical contractors, and maintenance teams responsible for commercial or light-industrial facilities where 277 V circuits are common will find the Square D FYB14015A a straightforward, reliable solution for single-pole protection.