Eaton FD1045L - 45 A, 277 V, 1-Pole Circuit Breaker | AmpState

Meet the Eaton FD1045L, a 45A, 277V, 1-pole molded case circuit breaker engineered for dependable protection in modern electrical panels.

Designed to ride in panelboards and loadcenters, this single-pole breaker handles branch circuit overcurrent and short-circuit protection with a compact profile that optimizes space inside the enclosure.

What makes it stand out

• Space-efficient molded case design: The compact form factor frees panel space, making it straightforward to fit into crowded load centers without compromising protection.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection across a range of temperatures and electrical loads, reducing nuisance trips while safeguarding connected equipment.
• 277V, 45A, 1-Pole configuration: Ideal for single-phase branch circuits in commercial lighting, power distribution, and other 277V applications.
• OEM panel compatibility: Tested and designed to integrate with matching Eaton OEM loadcenters and panelboards, ensuring reliable performance and straightforward replacement.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications where compact protection is essential.

Technical snapshot

• Manufacturer: Eaton
• Part Number: FD1045L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 45 A
• Voltage: 277 V
• Number of Poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Usage scenarios

Upgrade or retrofit panelboards in office buildings, warehouses, and retail spaces that rely on 277V lighting and equipment. The 1-pole design makes it ideal for protecting a single hot conductor in commercial lighting circuits, while the 45A rating accommodates typical load demands without overtripping.

Why choose this Eaton FD1045L? It combines a compact, space-saving package with a robust thermal-magnetic trip mechanism, delivering reliable protection and easier installation in OEM panels. If you’re replacing a failed breaker or stocking spare parts for service, this FD1045L is designed to slot into compatible load centers with minimal effort.

Secure, code-compliant protection for your 277V circuits — available from AmpState now.