Square D QBA221104 - 110 A, 2-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D QBA221104—a 110 A, 2-pole plug-in molded case circuit breaker built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. With a fast plug-in connection and a thermal-magnetic trip unit, this breaker delivers quick installation, reliable protection, and straightforward maintenance in a single, compact package.

Why this breaker stands out

• Quick plug-in connection supports fast installation or replacement, minimizing downtime during panel upgrades or servicing.
• Thermal-magnetic trip unit provides stable, repeatable protection—responding precisely to overload conditions while instantly interrupting severe short circuits.
• OEM-compatible design engineered to pair with matching Square D load centers and panelboards for seamless integration and consistent performance.
• Versatile for multiple environments suited to residential, commercial, and light industrial applications where dependable circuit protection is essential.

What it protects

This 2-pole molded case breaker safeguards against branch circuit overcurrent and short-circuit events. By delivering a fast, predictable trip response, it helps prevent wiring damage, minimizes fire risk, and preserves the longevity of your electrical system.

Technical specifications

• Manufacturer: Square D
• Part number: QBA221104
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 110 A
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or expanding panelboards and load centers in both new installations and retrofit projects.
• Replacing aging or non-functioning breakers in compatible Square D systems to restore reliable protection.
• Residential service panels that require robust 2-pole protection for large branch circuits.
• Commercial or light industrial distribution where rapid serviceability and dependable trip performance are priorities.

Installation and compatibility tips

Ensure you pair this plug-in breaker with a matching OEM load center or panelboard designed for Square D molded case breakers. Always verify panel labeling and rating to confirm 110 A, 2-pole protection is appropriate for the circuit in question. The plug-in design simplifies field replacements, but proper shutdown and lockout procedures should be followed during installation or servicing.

Choose the Square D QBA221104 for a reliable, easy-to-install protection solution that aligns with your existing Square D infrastructure, delivering consistent performance across residential, commercial, and light industrial electrical systems.