Square D EGB24040 - 40 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EGB24040 40 A, 480 V, 2-Pole Bolt-On Circuit Breaker—built for dependable branch circuit protection in panelboards and loadcenters. This molded-case device delivers strong performance in commercial and light industrial environments, and is also suitable for select residential applications that demand higher voltage protection.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays aligned and tight through electrical noise and equipment movement.
• Thermal-magnetic trip unit delivers stable, repeatable protection across temperature variations and transient electrical conditions, helping prevent nuisance trips while safeguarding wiring and equipment.
• OEM-loadcenter compatibility is designed to integrate smoothly with matching Square D load centers and panelboards, simplifying installation and inventory management.
• 2-pole, 40 A, 480 V configuration offers focused protection for branch circuits in higher-voltage distribution systems, ensuring reliable overcurrent and short-circuit protection where it matters most.

Technical snapshot

• Manufacturer: Square D
• Part number: EGB24040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40 A
• Voltage rating: 480 V
• Poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• New installations or panel retrofits in commercial spaces, offices, schools, and light industrial facilities that require 480 V distribution.
• Upgrading subpanels and service equipment where a robust, vibration-resistant connection improves long-term reliability.
• Applications that benefit from a predictable thermal-magnetic protection curve, delivering safe, consistent tripping behavior under real-world loads.

Why this model stands out

• The bolt-on design creates a more durable, vibration-tolerant connection in panels that experience movement or heavy usage, reducing loosening over time.
• Thermal-magnetic protection offers a balanced response to overloads and short circuits, helping protect downstream devices and wiring without unexpected trips.
• Compatibility with OEM panelboards minimizes compatibility concerns for maintenance teams standardizing on Square D components.

Practical tips

• Verify panelboard compatibility for bolt-on molded case breakers in this 2-pole, 40 A, 480 V configuration before installation.
• Keep a spare EGB24040 on hand to minimize downtime in critical commercial applications.
• Periodically inspect panel connections for signs of wear and ensure mounting bolts remain securely fastened to maintain optimal performance.