Square D EGB16025 - 25 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Engineered by Square D, the EGB16025 25A, 277V, 1-Pole Bolt-On Molded Case Circuit Breaker delivers dependable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, reducing the risk of connection loosening in cabinets that experience movement or vibration. The thermal-magnetic trip unit provides stable, repeatable protection across a range of temperatures, instantly interrupting fault currents while accommodating normal load variations.

Designed for seamless compatibility with matching OEM load centers, this breaker ensures proper fit, coordination, and performance within your Square D system. With a 25-amp rating at 277 volts, it is purpose-built for 277V distribution networks found in commercial settings, powering lighting circuits, receptacle runs, and control devices where reliable protection is essential.

• Secure bolt-on mounting — delivers a rigid, vibration-resistant bus connection that stays tight over time, supporting long-term reliability in busy panels.
• Thermal-magnetic trip unit — combines accurate thermal overload protection with an instantaneous magnetic trip for short-circuit events, ensuring fast, predictable response when it matters most.
• 277V, 1-pole operation — ideal for single-pole protection on 277V circuits common in commercial and light industrial environments.
• OEM-compatible — engineered to pair with Square D panelboards and loadcenters for coordinated performance and easy replacement.
• Compact, field-ready design — 1-pole bolt-on configuration accommodates standard enclosures, simplifying installation and future upgrades.

• Manufacturer: Square D
• Part number: EGB16025
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 25 A
• Voltage rating: 277 V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Practical use cases and scenarios

• Protect commercial 277V lighting circuits where consistent protection and uptime are critical.
• Upgrade or replace aging breakers in OEM panelboards that require a secure bolt-on device with reliable thermal-magnetic protection.
• Add a dependable, OEM-compatible 25A protection point for small power or control circuits in light industrial installations.

• Installation tips — ensure the breaker matches the panelboard’s listing and that line/load orientation is correct. Secure the bolt-on connection properly to maintain a solid bus contact and protection performance.
• Maintenance notes — periodically inspect connections for signs of looseness or overheating; replace if you notice discoloration, warmth, or wear indicative of degraded performance.
• Best-use practices — pair with compatible OEM load centers to preserve coordination and trip characteristics, and follow all applicable electrical codes during installation.

For reliable, code-compliant protection of 277V branch circuits in Square D installations, the EGB16025 stands out with its combination of secure mounting, precise thermal-magnetic protection, and OEM compatibility in a compact, easy-to-install package.