Eaton | FAZ-B4/1-SP | Circuit Breaker | 4A | 1-Pole | 277V

Meet the Eaton FAZ-B4/1-SP circuit breaker—a precise, reliable protection solution for 277V electrical systems. This 1-pole unit is rated for 4A, making it ideal for lightweight, dedicated circuits where space is at a premium and exact trip characteristics matter for downstream equipment.

Exact part reference for guaranteed compatibility — FAZ-B4/1-SP. Using the exact part number is the most reliable way to ensure this breaker fits Eaton panels and maintains proper ratings and safety certifications. Before ordering, confirm that the fit and ratings align with your panel’s requirements and the connected load.

• Amperage: 4 A
• Pole: 1-Pole
• Voltage: 277 V
• Part number: FAZ-B4/1-SP
• Recommended use: maintenance, retrofit, and replacement in compatible Eaton panel systems

Why this configuration matters: a single-pole 4A breaker for 277V circuits offers targeted protection for smaller loads—such as individual lighting runs or control circuits—without interrupting other portions of the distribution. It helps isolate faults quickly, reduces wiring disruption, and supports safer, faster maintenance in commercial or industrial environments.

Ideal for: contractors performing panel upgrades or retrofits, facilities teams maintaining aging electrical infrastructure, and engineers designing 277V distribution with modular protection that can be swapped in with minimal downtime.

Practical tips for best results —

• Verify panel compatibility by cross-referencing the part number FAZ-B4/1-SP with your Eaton panel's listing and datasheet.
• Use this 4A, 1-pole breaker for circuits that require lightweight protection without affecting adjacent loads.
• During retrofit or replacement, power down the panel, follow standard lockout/tagout procedures, and replace only with an exact match to preserve labeling and warranty considerations.

For engineers and technicians seeking dependable overcurrent protection in 277V configurations, the Eaton FAZ-B4/1-SP offers a reliable, straightforward solution that simplifies maintenance while preserving system integrity. When in doubt, rely on the exact part reference to ensure consistency across your electrical infrastructure.