Eaton EHD1090L - 90 A, 277 V, 1-Pole Circuit Breaker | AmpState

Overview

The Eaton EHD1090L is a compact 90A, 277V, 1-pole molded case circuit breaker designed to deliver reliable branch-circuit protection in panelboards and load centers. Built for dependable overcurrent and short-circuit protection, this breaker fits seamlessly into Eaton‑matched systems to keep electrical distribution safe and efficient.

Key Features and Benefits

• Space‑saving molded case design prioritizes panel space, making it easier to fit multiple devices in compact installations without compromising protection.
• Thermal‑magnetic trip unit delivers stable, repeatable protection by combining overload sensing with short‑circuit response—reducing nuisance trips while reacting quickly to faults.
• 1‑pole configuration ideal for single‑phase branch circuits common in residential, commercial, and light industrial applications.
• 277V rating tailored for light‑commercial and certain industrial electrical systems, such as 277V lighting and related loads.
• OEM compatibility designed to pair with matching Eaton panelboards and loadcenters for dependable interchangeability and performance.
• Versatile application suitable across residential, commercial, and light industrial environments where reliable protection is essential.

Technical Specifications

• Manufacturer: Eaton
• Part Number: EHD1090L
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 90A
• Voltage Rating: 277V
• Number of Poles: 1
• Application: Branch circuit overcurrent and short‑circuit protection

Use Cases and Scenarios

• Replacing a worn or failed breaker in an Eaton panelboard serving a 277V lighting circuit in a small office or retail space.
• Providing robust protection for single‑phase branch circuits in light commercial environments where 277V systems are standard.
• New installations where a compact, reliable 1‑pole breaker with a 90A rating is needed to manage larger load segments without crowding the panel interior.

Why Choose the Eaton EHD1090L

If you’re upgrading a panel or configuring a new distribution setup, the EHD1090L offers a precise balance of space efficiency, dependable thermal‑magnetic protection, and OEM‑aligned compatibility. By selecting a part number that matches your Eaton panelboard or loadcenter, you ensure consistent performance, easier maintenance, and straightforward replacement in the future.

Compatibility & Installation Notes

This breaker is designed to be compatible with matching Eaton OEM loadcenters and panelboards. When selecting for an existing system, verify that the panel is listed for molded case, 1‑pole, 90A, 277V operation to ensure optimal protection and seamless operation.