Square D QDA221252 - 125 A, 2-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D QDA221252, a 125 A, 2-pole plug-in molded case circuit breaker built to shield your panelboard or load center from overcurrent and short circuits. With a fast plug-in connection and a reliable thermal-magnetic trip system, this breaker keeps critical circuits protected while minimizing installation downtime.

Key benefits that translate to real-world performance:

• Rapid plug-in installation — a secure plug-in connection designed for quick replacement and minimal service interruptions, so you can complete panel upgrades or maintenance faster.
• Thermal-magnetic trip unit — combines time-delayed thermal protection with instantaneous magnetic response, delivering stable, repeatable protection across a range of fault conditions.
• OEM compatibility — precisely engineered to fit matching Square D OEM load centers and panelboards, preserving proper fit, listing, and overall system reliability.
• Two-pole, 125 A design — ideal for 240 V circuits and main/branch protection in residential, commercial, and light industrial applications, offering straightforward upgrade paths for demanding loads.

Where and how you’ll use it

Designed for dependable branch circuit protection, the QDA221252 is well-suited for:

• Residential service panels and subpanels where a reliable 125 A main/branch protection is required
• Commercial panelboards and light industrial load centers needing robust overcurrent and short-circuit safeguarding
• Retrofit installations where quick replacement minimizes downtime and ensures compatibility with existing Square D equipment

What sets this breaker apart

While many breakers offer basic protection, the QDA221252 stands out through its combination of plug-in ease, precise thermal-magnetic protection, and guaranteed compatibility with Square D panel systems. This means fewer mismatches, faster service calls, and consistent performance across installations that demand reliability in demanding environments.

Technical snapshot

• Manufacturer: Square D
• Part number: QDA221252
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 125 A
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re upgrading an aging panel, consolidating protection for critical loads, or outfitting a new installation, the Square D QDA221252 delivers dependable performance, quick installation, and clean compatibility with your existing Square D infrastructure.