Square D EGB14040 40A 1P 277V Circuit Breaker, Bolt-On | AmpState

The Square D EGB14040 40A 1P 277V bolt-on circuit breaker is a purpose-built protector for commercial electrical systems, designed to shield panelboards, load centers, and distribution networks from overloads and short circuits. With a single-pole, 40-amp rating and 277-volt capability, it’s a precise solution for lighting and power circuits common in today’s business environments.

Why bolt-on matters: the bolt-on design delivers secure, vibration-resistant mounting in compatible Square D panels, making it an excellent choice for retrofit projects and maintenance planning where you need to preserve a consistent part number for documentation and future service. The EGB14040 is part of Square D’s trusted EGB bolt-on family, ensuring a dependable fit within compatible panels and a predictable protection strategy across replacements.

• Amperage: 40 A
• Poles: 1
• Voltage: 277 V
• Mounting: Bolt-On
• Part Number: EGB14040
• Manufacturer: Square D

AmpState offers this part to support quick, reliable replacements and consistent inventory for ongoing retrofit and maintenance projects. If you’re unsure whether this exact part fits your panel, send us a message and we’ll help verify compatibility with your model, labeling, and distribution setup.

Who should consider the EGB14040? electrical professionals coordinating upgrades in commercial facilities, property managers maintaining aging panel inventories, and contractors executing planned maintenance windows where downtime must be minimized. Use cases include upgrading or stocking a spare for 277V lighting circuits, replacing a worn bolt-on breaker in a Square D panel, or standardizing a single-pole protection strategy across multiple distribution panels.