Square D EHB14040 Circuit Breaker, 40A, 1-Pole, 277V

The Square D EHB14040 Circuit Breaker is built for demanding industrial environments, delivering reliable protection for 277V circuits with 40 A of current on a single pole. As part of the On Circuit Breaker Rating EHB family, this breaker is designed for service, maintenance, and replacement projects where dependable overcurrent protection matters most.

• 1-Pole, 277V operation—perfect for dedicated feeders, lighting circuits, and control feeds in commercial and industrial facilities.
• 40 A protection—sharp, predictable trip characteristics that guard equipment without unnecessary outages.
• Rugged, field-ready design—engineered for durability in real-world installations and easier replacement during maintenance cycles.
• Part of the EHB series—a recognized solution for industrial panelboards and distribution equipment, with compatibility verified by part number.
• Clear compatibility guidance—verify fit using the exact part number EHB14040 and your voltage/amperage requirements to ensure a proper match.

Ideal use cases include industrial electrical service upgrades, panel replacements, and routine maintenance on 277V distribution networks. This breaker provides consistent trip performance and straightforward replacement in existing Square D installations, helping keep critical systems like manufacturing lines, warehouses, and facility HVAC running smoothly.

Practical tips for install and selection:

• Power down the system and confirm the circuit voltage before installation.
• Cross-check the part number EHB14040 against your panel labeling to ensure seamless mounting and correct trip curves.
• Use this breaker specifically where a 40A, 1-Pole, 277V protection device is required to prevent nuisance trips and protect connected equipment.

If you need assistance confirming compatibility or matching the exact part number to your application, send us a message and we’ll help verify fit for your specific panel and load needs.