Eaton FAZ-K4/1N - 4 A, 480 V, 1-Pole Circuit Breaker | AmpState

Meet the Eaton FAZ-K4/1N — a compact, dependable 4 A, 480 V, 1-pole molded case circuit breaker designed to shield panelboards and load centers from overcurrent and short-circuit events. Engineered for reliable performance in real-world installations, this unit fits seamlessly into matching OEM panels, delivering precise protection where space and reliability matter most.

Key advantages

• Space-efficient design — a molded case construction that makes the most of panel real estate, helping you maintain a clean, organized electrical setup even in tight spaces.
• Thermal-magnetic trip unit — combines fast magnetic response for short circuits with thermal protection for gradual overloads, yielding stable, repeatable protection without nuisance trips.
• OEM panel compatibility — designed to drop into matching Eaton and OEM load centers and panelboards, simplifying upgrades, replacements, and serviceability.
• 1-pole protection — ideal for dedicated branch circuits where space and simplicity are priorities, without sacrificing safety or performance.
• 4 A at 480 V — calibrated for light industrial, commercial, and certain high-demand residential applications that use 480 V single-phase distribution.

Specifications at a glance

• Manufacturer: Eaton
• Part Number: FAZ-K4/1N
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 4 A
• Voltage Rating: 480 V
• Number of Poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Commercial and light industrial panelboards where 480 V single-phase distribution is present and space is at a premium.
• Upgrading or replacing worn breakers in OEM panels to maintain compatibility and reliable protection.
• Lighting, receptacle feeds, or small equipment circuits within panelboards that require precise 4 A protection without large footprint.
• Situations where a compact, dependable thermal-magnetic solution helps simplify wiring layouts and reduces panel complexity.

Practical guidance for installation and longevity

To maximize performance, pair the FAZ-K4/1N with panels and load centers designed for 480 V distribution and single-pole protection. Ensure the installation aligns with panel specifications and manufacturer torque recommendations for terminals. When replacing, verify the new breaker matches the original type and rating to preserve panel coordination and trip characteristics. Having a compatible spare on hand can minimize downtime during service or upgrades.

Choosing the Eaton FAZ-K4/1N from AmpState means selecting a trusted solution that prioritizes space efficiency, precise protection, and straightforward compatibility with existing panel infrastructure. If you’re modernizing a commercial or light industrial installation—and need reliable, 1-pole overcurrent protection at 480 V—this breaker offers a focused, practical option that fits where you need it most.