Square D AB-5177 - 20A, 1-Pole, Circuit Breaker

The Square D AB-5177 is a compact, dependable 20A circuit breaker engineered for single-pole protection in demanding electrical environments. Designed for use in panelboards, switchboards, and control panels, this 1-Pole breaker delivers reliable overcurrent protection where single-phase circuits demand quick, safe isolation and restart.

Key benefits you’ll notice

• 20A single-pole protection tailored for lighting, control circuits, and other single-phase loads, helping prevent wiring damage and equipment downtime.
• 1-Pole configuration offers flexible wiring choices and streamlined installation in compact panels, reducing space requirements without sacrificing safety.
• Reliable overcurrent protection for distribution panels and motor control centers, supporting safer operation in industrial, commercial, and OEM settings.
• Compatibility with Square D ecosystems ensures consistent performance with existing breakers, panels, and field-installed accessories.

Ideal use scenarios

• New builds and panel upgrades in industrial facilities where dependable single-phase protection is essential.
• Control panels and switchboards that require compact, easy-to-install protective devices.
• OEM equipment where standardized 20A, 1-Pole breakers simplify design and maintenance.
• Distributor and motor control centers needing quick-trip, straightforward maintenance and component swaps.

What makes this model stand out

The AB-5177 pairing of a 20A rating with a 1-Pole design delivers a precise balance between circuit protection and space efficiency. For technicians and engineers, this translates to faster panel assembly, straightforward troubleshooting, and reliable performance in environments where dependable protection is non-negotiable.

Choose the Square D AB-5177 when your application requires clear, single-phase protection in a compact form factor, backed by a trusted brand known for consistent safety and compatibility across distribution panels and motor control centers.