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

Key advantages that matter in the field

Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, maintaining stable electrical contact even in high-traffic panels or equipment with mounting tolerances that shift over time. The thermal-magnetic trip unit combines fast response with consistent behavior, reducing nuisance trips while still delivering strong protection against overcurrent and short circuits.

Designed for OEM compatibility and versatile use

Engineered to pair with matching Square D OEM panelboards and loadcenters, the EGB14045 delivers a seamless install experience and dependable long-term operation. Its 1-pole configuration makes it ideal for single-phase circuits in commercial lighting, feeders, and equipment that run on 277V—areas where reliable protection is essential but space and simplicity matter most.

Who benefits from this breaker

• Electrical professionals upgrading or refurbishing panelboards in commercial spaces
• Maintenance teams stocking dependable, field-proven components for light industrial environments
• Electrical contractors seeking a durable, easy-to-install bolt-on solution compatible with Square D systems

What problems this solves

• Prevents damage from sustained overcurrent by delivering consistent magnetic trip response
• Minimizes vibration-induced connection fatigue with secure bolt-on mounting
• Ensures compatibility and reliable performance within 277V circuits in panelboards and loadcenters

Practical use cases and installation ideas

Use the EGB14045 to protect a dedicated 277V circuit serving commercial lighting, HVAC feeders, or other single-phase equipment in a panelboard. Its bolt-on design is particularly advantageous when panel assemblies require a rigid connection that resists loosening over time, or when retrofitting older installations with a modern protection device. For panel builders, this breaker simplifies sourcing and maintains consistency across a fleet of Square D components.

Technical snapshot

• Manufacturer: Square D
• Part Number: EGB14045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45 A
• Voltage Rating: 277 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this matters for your equipment and uptime

Choosing a breaker that combines secure mounting, dependable protection, and OEM compatibility translates to faster service calls, fewer panel recalibrations, and consistent protection across your electrical distribution. The EGB14045 is purpose-built to deliver long-term reliability in environments where 277V circuits and single-pole protection are common, without compromising ease of installation or compatibility with existing Square D systems.

Informed choice, peace of mind

If you’re assembling or maintaining a panelboard or loadcenter that relies on precise, repeatable protection for 277V single-phase circuits, the Square D EGB14045 stands out with its bolt-on rigidity and thermal-magnetic response. It’s a practical, field-ready choice for professionals who value compatibility, performance, and the confidence that comes with using trusted Square D components.