Cutler-Hammer EH1040 Circuit Breaker, 40A, 1-Pole, 277V

The Cutler-Hammer EH1040 Circuit Breaker is a rugged, single-pole protection device designed for industrial electrical service, maintenance, and replacement projects. As part of the Case Breaker EH family, this 40 A, 277 V breaker delivers dependable, targeted overcurrent protection for individual circuits in demanding environments.

Key specifications at a glance:

• Amperage and type: 40 A, 1-pole design, suitable for single-phase circuits.
• Voltage rating: 277 V, ideal for commercial/industrial distribution and lighting systems that run on 277 V.
• Series and compatibility: Part of the Cutler-Hammer Case Breaker EH family. Use the part number EH1040 to confirm fit with your panel or switchgear and ensure it meets your application requirements.
• Intended use: Industrial electrical service, maintenance, and replacement projects—great for upgrading or replacing aging protection devices in established EH-series installations.
• Fit and confirmation: Verify fit by part number and application requirements. If you’re unsure about compatibility, you can message us for assistance in matching the right part.

Why choose the EH1040 for your project?

• Precise single-pole protection for circuits where 40 A of current is enough to safeguard equipment and wiring against overloads.
• 277 V capability aligns with common commercial electrical infrastructure, reducing the need for additional adapters or transformers.
• Clear procurement path with a specific part number, reducing guesswork and downtime during panel maintenance or upgrades.

Practical tips for installation and maintenance:

• Always verify fit by part number and confirm that the EH1040 matches your panel’s requirements and the target circuit’s specifications.
• Keep a small inventory of EH-series breakers for rapid replacements in critical systems.
• If you need help matching a part number or confirming compatibility, message us and our team will guide you to the right part.