Eaton EHD1045L - 45 A, 277 V, 1-Pole Circuit Breaker | AmpState

The Eaton EHD1045L is a 45A, 277V, 1-pole molded-case circuit breaker engineered to protect your branch circuits in panelboards and load centers. Built for dependable overcurrent and short-circuit protection, this unit helps keep electrical systems safer and more reliable in everyday commercial, residential, and light-industrial environments.

Key features that make this breaker stand out:

• Compact molded-case design maximizes panel space, helping you fit more circuits into tighter panels without sacrificing protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection, responding to nuisance temperature changes while providing instantaneous short-circuit clearing when needed.
• 1-pole, 45A, 277V specification tailored for typical branch circuits in panelboards and load centers used in commercial and residential settings.
• OEM-compatible designed to pair with matching OEM load centers and panelboards for straightforward installation and reliable performance.
• Versatile application suitable for residential, commercial, and light industrial circuits, including lighting, receptacle, and small equipment runs.

Why this Eaton breaker matters for your electrical system

Choosing the EHD1045L means opting for a proven protection solution that balances space efficiency with precise trip behavior. The thermal-magnetic mechanism provides clear, predictable trips: the thermal element handles sustained overloads, while the magnetic element quickly interrupts severe faults. That combination helps minimize downtime and equipment damage in busy panelboards and load centers.

Technical snapshot

• Manufacturer: Eaton
• Part number: EHD1045L
• Type: Thermal-magnetic molded-case circuit breaker
• Amperage rating: 45A
• Voltage rating: 277V
• Number of poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Install the EHD1045L in panelboards or load centers where space is at a premium and reliable protection is essential. It’s well-suited for:

• Smaller commercial offices powering lighting and outlets
• Residential subpanels with compact circuit layouts
• Light industrial equipment circuits where consistent protection is critical

Tips for optimal performance

• Ensure compatibility with your panelboard or load center’s model and mounting format to maintain UL-listed protection.
• Match the breaker’s amperage rating to the protected circuit’s load calculations to prevent nuisance trips or under-protection.
• When replacing an existing breaker, verify that the thermal-magnetic trip characteristics align with the system’s fault current profile for predictable responses.