Eaton FAZ-B12-3 12A 480V 3-Pole Molded Case Circuit Breaker

The Eaton FAZ-B12-3 is a compact 12A, 480V, 3-pole molded case circuit breaker engineered to deliver reliable branch circuit protection in panelboards and loadcenters. Built to guard electrical systems against overcurrent and short-circuit events, this device pairs precise thermal-magnetic protection with space-efficient design for modern electrical assemblies.

• Compact molded case design maximizes panel space and simplifies wire routing, helping you fit more circuits in tight panels without compromising protection.
• Thermal-magnetic trip unit offers stable, repeatable protection across temperature fluctuations, reducing nuisance tripping while ensuring fast response to faults.
• Three-pole configuration ideal for 3-phase systems, suitable for panelboards and loadcenters in commercial and light industrial environments.
• OEM-compatible designed to work with matching Eaton OEM loadcenters and panelboards, ensuring proper fit, labeling, and coordinated protection across your distribution system.
• Broad application range suitable for residential, commercial, and light industrial applications, delivering dependable protection for a variety of circuits and equipment.

Technical snapshot

• Manufacturer: Eaton
• Part Number: FAZ-B12-3
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 12 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and install scenarios

In a commercial panelboard, the FAZ-B12-3 provides robust protection for three-phase distribution circuits feeding motors, lighting, and receptacle banks. In lighter industrial setups, it helps shield equipment from short circuits while maintaining reliable operation of the broader electrical system. For residential allocations where a 3-pole, 480V protection point is required, this unit delivers dependable interruption performance in compatible installations. Its compact footprint is particularly valuable in panels with constrained front-of-board space, allowing more room for conductors and field labeling.

Why this matters

Choosing the FAZ-B12-3 means opting for a breaker designed to maintain consistent protection while occupying minimal panel real estate. The combination of a molded case form factor and a thermal-magnetic trip mechanism translates to predictable response across environmental conditions, reducing the risk of unexpected outages and making coordination with other protective devices simpler.

Installation and maintenance tips

Ensure the panelboard or loadcenter is compatible with the FAZ family and rated for 480V, 3-pole operation. When replacing an existing breaker, match the part number (FAZ-B12-3) to preserve coordinated protection and labeling integrity. After installation, perform a functional test to verify the trip action and confirm proper alignment with the panel’s bus and terminal connections. Keep spare units on hand to minimize downtime in the event of a fault and to streamline future replacements.