Eaton | EHB1100LK | Circuit Breaker | 100A | 1-Pole | 277V

Meet the Eaton EHB1100LK: a purpose-built 100A, 1-Pole circuit breaker engineered for 277V distribution. This unit is purposefully designed for maintenance, retrofit, and replacement projects where matching specs matters, helping you restore reliable overcurrent protection without surprises.

Key details at a glance

• Amperage: 100A
• Poles: 1-Pole
• Voltage rating: 277V
• Part number: EHB1100LK (best reference for compatibility)

Why the EHB1100LK stands out

Unlike generic substitutes, this Eaton breaker is aligned with the same form, fit, and electrical characteristics used in Eaton panels and distribution setups. The EHB1100LK is specifically suited for 277V circuits, which are common in commercial lighting, HVAC controls, and other high-voltage branch installations. Its single-pole design provides focused protection for a single hot leg, delivering quick interruption when overcurrent occurs and helping protect wiring and devices in your 277V footprint.

Ideal use cases

• Maintenance work on existing Eaton panelboards and distribution boards that require a 100A, 1-Pole, 277V breaker.
• Retrofits where upgrading or replacing aging breakers demands exact compatibility with the original spec sheet.
• Replacement of a failed or worn breaker in commercial electrical systems powered by 277V circuits.

What problems this solves

• Prevents mismatches during replacement by relying on the precise EHB1100LK part number for compatibility.
• Reduces downtime in service upgrades by providing a straightforward, plug-and-play solution for 277V line protection.
• Preserves the integrity of your electrical design by maintaining the intended protection scheme on 277V circuits.

Practical guidance for installation and use

• Before ordering, verify that the panel and circuit require a 100A, 1-Pole, 277V protective device and cross-check labeling on the panel schedule.
• When wiring, ensure proper termination on the line and load terminals and follow standard safety practices for high-voltage work.
• Torque specifications and mounting alignment should conform to your panel manufacturer’s guidelines to ensure reliable operation.
• Use the EHB1100LK as a targeted replacement for a like-for-like protection scheme in Eaton systems to maintain electrical performance consistency.

Notes on compatibility

Fit and ratings are critical—confirm the 277V rating and 100A capability align with your circuit requirements. The part number EHB1100LK serves as the most reliable reference for ensuring compatibility within Eaton-based installations.