Eaton EHD1070 - 70 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Eaton EHD1070 is a 70A, 277V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Built for rugged performance, this bolt-on breaker features a secure mounting method that creates a rigid, vibration-resistant bus connection. Its thermal-magnetic trip unit delivers stable, repeatable protection—responding quickly to dangerous faults while minimizing nuisance trips during normal operation.

• Bolt-on mounting: establishes a solid, vibration-resistant connection for reliable long-term performance in demanding environments.
• Thermal-magnetic trip: combines temperature-based overload protection with magnetic instantaneous trip for fast, dependable short-circuit interruption.
• 277V rating: optimized for commercial lighting and equipment circuits that operate at 277V, a common standard in non-residential spaces.
• 70A, 1-pole: appropriately sized to protect a single branch circuit or feeder with clear, predictable trip characteristics.
• Panel and load center compatibility: designed to pair with matching OEM load centers and Eaton panelboards for seamless upgrades or new installations.
• Versatile applications: suitable for residential, commercial, and light industrial use where reliable 277V protection is required.

Why this breaker stands out: the bolt-on design delivers a robust bus connection that resists loosening from vibration and thermal cycling—crucial for commercial panels and retrofit projects. The molded case construction helps contain arc energy and simplifies field maintenance while meeting essential safety standards.

Practical use scenarios:

• Protect a 277V lighting circuit in a small office, retail, or institutional space to ensure rapid shutdown during faults.
• Guard a dedicated 277V receptacle or equipment circuit in a commercial setting where stable, long-term protection is essential.
• Upgrade an existing panelboard with a bolt-on breaker that aligns with the system’s protection coordination and OEM specifications.

Practical installation notes:

• Confirm panelboard compatibility with bolt-on molded case breakers and select the 70A, 1-pole rating for the target circuit.
• Install in accordance with local electrical codes and Eaton installation guidelines for mounting and wiring connections.
• Periodically inspect mounting hardware and bus connections to maintain the integrity of the vibration-resistant design.