Eaton FAZ-B4-3N - 4 A, 480 V, 3-Pole Circuit Breaker | AmpState

Eaton FAZ-B4-3N is a 4A, 480V, 3-pole molded case circuit breaker (MCCB) engineered to protect branch circuits in panelboards and loadcenters from overcurrent and short circuits. The compact molded case design helps maximize panel space while delivering dependable protection you can count on.

Key features

• 4A at 480V, 3-pole precise protection for small-draw circuits within residential, commercial, and light-industrial environments.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across a range of fault conditions, reducing nuisance trips and unwanted downtime.
• Compact molded case design enables efficient use of panel space without compromising safety or reliability.
• OEM-compatible designed to be used with matching OEM loadcenters and panelboards for a reliable fit and consistent electrical performance.

Technical specifications

• Manufacturer: Eaton
• Part number: FAZ-B4-3N
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage rating: 4 A
• Voltage rating: 480 V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications and use cases

Designed for installations where space is at a premium and reliable protection is essential, the FAZ-B4-3N excels in:

• Upgrading subpanels and service panels in small commercial spaces
• Protecting lighting, receptacle, and control circuits in light-industrial environments
• Retrofits and new installations that require a 3-pole MCCB with a precise 4A protection level at 480V
• Panelboard modernization using compatible OEM components to ensure cohesive performance

Why choose the FAZ-B4-3N

This model combines Eaton’s proven MCCB technology with a compact footprint, enabling efficient panel design without sacrificing protection quality. The thermal-magnetic trip mechanism offers dependable response to both sustained overloads and short-circuit faults, helping protect wiring and connected equipment while facilitating safe disconnection across all three conductors.

Tips for installation and compatibility

• Confirm your panelboard or loadcenter is rated for 480V operation and supports three-pole molded case breakers in the FAZ family.
• Use only with matching OEM loadcenters or panelboards to ensure optimal fit, mechanical engagement, and electrical performance.
• Match the protection needs of your circuit to the 4A rating to prevent nuisance trips while safeguarding wiring and devices.