Eaton HFD1040 - 40 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Eaton HFD1040 is a 40A, 277V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for rigorous commercial and light industrial environments, this unit combines secure mounting with precise tripping for reliable safety and performance.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing movement and the risk of loose contacts in busy panels.
• Thermal-magnetic trip unit delivers stable, repeatable protection, automatically adjusting to electrical conditions to prevent nuisance trips while safely interrupting faults.
• Single-pole, 40A design targets individual branch circuits with clear, predictable protection for loads that demand straightforward, dependable control.
• 277V rating makes it particularly well-suited for commercial lighting, feeders, and other 277-volt systems common in offices, retail spaces, and light industrial settings.
• OEM loadcenter compatibility engineered to pair with matching Eaton OEM loadcenters and panelboards for seamless integration.

Ideal applications and practical uses

Whether you’re constructing a new commercial space, upgrading a panel, or performing routine maintenance, the HFD1040 excels in environments where reliability matters. Ideal use cases include:

• Commercial lighting circuits and feeders in 277V distribution systems
• Residential and light industrial panelboards needing robust, single-pole protection
• Retrofits and panel upgrades where secure mounting and predictable trip behavior reduce downtime

What you gain with Eaton HFD1040

Beyond basic specs, this breaker delivers tangible benefits:

• Consistent protection that responds to overcurrent and short-circuit conditions without oscillation or drift over time
• Durable mounting that stands up to vibration and electrical chatter in busy electrical rooms
• Easy compatibility with existing Eaton panel systems, minimizing compatibility concerns during replacement or expansion
• Clear, reliable performance for critical circuits where uptime and safety are paramount

Technical snapshot

• Eaton
• Part Number: HFD1040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 277V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection in panelboards and load centers

Access the dependable protection you need for 277V systems with the Eaton HFD1040—the bolt-on, thermal-magnetic choice designed for steady performance in today’s residential, commercial, and light industrial environments. Available through AmpState for straightforward procurement and fast integration into your existing Eaton installations.