Square D EGB14045 45A 1P 277V Circuit Breaker, Bolt-On | AmpState

Meet the Square D EGB14045 45A 1P 277V Bolt-On Circuit Breaker, a trusted choice from AmpState for everyday electrical protection in panelboards, load centers, and electrical distribution systems. This single-pole breaker is built to reliably interrupt and isolate a 277-volt circuit, safeguarding both people and equipment.

Designed for replacement projects and stocking spares, it helps you keep the BOM aligned to the original part numbers—minimizing downtime when a breaker is required.

• Rated 45 A at 277 V across a single pole, ideal for lighting and general-purpose circuits in commercial or industrial environments.
• Bolt-On mounting provides a secure, vibration-resistant connection and faster installation in panelboards and distribution panels.
• Square D quality and compatibility with the EGB series ensure dependable performance and straightforward integration with existing assemblies.
• Perfect as a stock spare to simplify maintenance planning and reduce run-time delays during service calls.
• If you need compatibility confirmation or help matching a part number, AmpState is ready to assist—message us to confirm fit.

Practical use and installation tips

Before installing, verify that your panel accepts a 1-pole, 277V, 45A bolt-on breaker and that the mounting hardware aligns with Square D EGB devices. Follow proper safety procedures and ensure the panel is de-energized during replacement.

What you gain

With the Square D EGB14045, you gain reliable overcurrent protection for 277V circuits, streamlined field replacements, and peace of mind from stocking a compliant, OEM-part-number-aligned spare. This is more than a part—it's a ready-to-go solution for maintaining continuous operation in demanding electrical environments.