Eaton HFD1100 - 100 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Eaton HFD1100 is a 100-amp, 277-volt, 1-pole bolt-on molded case circuit breaker designed to shield branch circuits in panelboards and loadcenters from overloads and short circuits. Built for reliability in demanding electrical environments, this device combines secure mounting with precise, repeatable protection to keep your power system running smoothly.

Why the HFD1100 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, minimizing movement that can compromise connections and performance.
• Thermal-magnetic trip unit delivers stable, repeatable protection by reacting to overloads thermally and shortening fault isolation time with a magnetic trip for fast response to short circuits.
• OEM-compatible design ensures seamless integration with matching Eaton load centers and panelboards, making upgrades or replacements straightforward.
• Versatile 277V protection is ideal for residential, commercial, and light industrial applications requiring reliable branch circuit protection.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HFD1100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 277 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical uses and scenarios

In commercial panelboards serving offices or retail spaces, the HFD1100 provides dependable protection for high-demand circuits at 277 V. It’s an effective replacement for aging breakers in OEM loadcenters, preserving the panel’s architecture while restoring safety margins. For light industrial environments where equipment startups can introduce vibration, the bolt-on design helps maintain a solid electrical bond over time, reducing the risk of loose connections and nuisance trips.

Installation and safety notes

Before installation, confirm compatibility with your OEM panelboard or loadcenter. The 1-pole bolt-on format is designed for straightforward mounting in appropriate enclosures; always follow local electrical codes and manufacturer guidelines to ensure safe operation and service life.

With the Eaton HFD1100, you gain precise, dependable overcurrent and short-circuit protection tailored for 100 A, 277 V circuits—delivering performance you can trust in a wide range of building configurations.