Eaton FAZ-D8/1-NA-SP 8A 1-Pole 277 V Circuit Breaker Potential Transformer

Meet the Eaton FAZ-D8/1-NA-SP 8A 1-Pole 277 V Circuit Breaker — a purpose-built protection device designed for single-phase, mid-size circuits in commercial environments. This compact, easy-to-install breaker brings precise overcurrent protection to 277-volt systems, making it a dependable choice for lighting feeders and small electrical loads in offices, retail spaces, and facilities with 277 V supply.

• Current rating: 8 A
• Poles: 1
• Voltage rating: 277 V
• Part number: FAZ-D8/1-NA-SP

Why this breaker stands out

The FAZ-D8/1-NA-SP is purpose-built for North American electrical systems requiring a single-pole solution at 277 V. Its 8-amp rating targets smaller, sensitive circuits where precise protection matters—think dedicated lighting runs, control circuits, or auxiliary loads within a panel where space is at a premium. Designed to integrate with Eaton panels and the FAZ family ecosystem, it delivers reliable trip performance when overcurrent occurs, helping you avoid nuisance outages while safeguarding equipment.

Key benefits in real-world use

• Targeted protection for 277 V circuits: Specifically suited for commercial lighting and low-rights loads in 277 V environments, reducing the risk of damage from overloads.
• Space-efficient single-pole design: Ideal for panel configurations where a compact, single-circuit protector is needed without sacrificing reliability.
• Compatibility and.replaceability: Fits standard Eaton panel architectures that accept FAZ-D8/1-NA-SP, simplifying upgrades, retrofits, or replacements in existing installations.
• Clear identification for metering workflows: The potential transformer reference hints at compatibility with protection schemes that pair breakers with metering and fault-indication equipment, enabling coordinated protection and monitoring in complex electrical systems.

Practical use cases

- Upgrade or retrofit a 277 V lighting feeder in a commercial space where a single-pole, 8 A breaker is appropriate.

- Protect dedicated control circuits or small mechanical loads connected to a 277 V supply, ensuring quick isolation during faults.

- Deploy as part of a broader protection strategy that interfaces with metering or potential-transformer-based monitoring for enhanced fault detection and system visibility.

Installation and care tips

Ensure the panel or distribution board is compatible with the FAZ-D8/1-NA-SP form factor and that the circuit aligns with the 277 V supply. Install only by qualified personnel following local electrical codes. Regularly inspect for signs of wear, corrosion, or overheating and replace after any tripping event or visible damage to maintain protection integrity.

Who should choose this Eaton breaker

Electrical professionals designing or maintaining commercial spaces with 277 V systems who need a reliable, single-pole protection solution in a compact package. If you’re upgrading a legacy panel or implementing a metering-friendly protection scheme, the FAZ-D8/1-NA-SP offers a precise, compatible option that aligns with Eaton’s protection and monitoring ecosystem.