Square D | Q221125AB | Circuit Breaker | 2-Pole | 240V

The Square D Q221125AB circuit breaker is a reliable 2-pole, 240V protective device designed for maintenance, retrofit, and replacement needs where exact spec compatibility matters. Built to integrate seamlessly with existing Square D panels, this part is chosen when the Q221125AB designation is the clearest reference for fit and performance.

• 2-Pole configuration provides simultaneous interruption of both live conductors in a 240V circuit, delivering dependable protection for dual-hot load setups.
• 240V operation tailored for circuits that require higher voltage protection, making it suitable for many residential and light commercial applications.
• Part number clarity — Q221125AB serves as the best compatibility reference, helping you confirm the correct replacement for your panel.
• Maintenance, retrofit, and replacement readiness — swap in this breaker to restore or upgrade overcurrent protection without major panel changes.
• Durable, field-reliable construction designed to withstand typical electrical loads and environments found in standard panel installations.

Compatibility and fit notes
Before ordering, verify that your panel accepts this exact part reference. The Q221125AB designation is the best guide for compatibility, and confirming the appropriate fit and ratings ensures safe, reliable operation in your electrical system.

Use cases and ideal applications
- Replacing a failed or older 2-pole 240V breaker in residential panels.
- Retrofit projects where a 240V two-pole protection device is required to support upgraded or expanded circuits.
- Routine maintenance cycles that involve upgrading to a trusted Square D component for consistent performance.

Why choose this Square D replacement
Choosing an original Square D part like the Q221125AB helps preserve the longitudinal performance and compatibility of your existing panel. It’s engineered to align with Square D’s design standards, ensuring predictable trip characteristics and ease of installation for technicians familiar with this brand.