Square D QOB120AS - 20A, Circuit Breaker

Engineered for reliability in demanding electrical environments, the Square D QOB120AS delivers precise 20A overcurrent protection for critical distribution systems. Whether you’re wiring panelboards, switchboards, control panels, or OEM equipment, this 20 Amp circuit breaker is built to safeguard people and equipment by interrupting fault current quickly and safely.

• 20A current rating—provides the appropriate protection level for branch circuits and motor loads across many commercial and industrial applications.
• Versatile installation targets—designed for panelboards, switchboards, control panels, and OEM equipment, enabling streamlined integration into existing electrical architectures.
• Dependable overcurrent protection—helps prevent insulation damage, nuisance trips, and equipment downtime by delivering consistent, reliable interruption when faults occur.
• Optimized for distribution panels and motor control centers—a trusted component in systems where uptime and safe operation are critical.
• Industrial and commercial readiness—robust construction suited to challenging environments and frequent switching tasks common in facilities and manufacturing lines.

Practical use cases

• Protect a 20A branch circuit feeding motors, drives, or control devices within a production line.
• Upgrade or standardize protection in panelboards and switchboards used in commercial facilities, warehouses, or data centers.
• In OEM equipment, ensure consistent, reliable short-circuit and overload protection to prevent downtime during operation.

Tips for optimal results: verify compatibility with your panel listing and enclosure, match the 20A rating to conductor size and connected loads, and install following electrical codes and OEM guidelines to maintain proper torque and safe operation.

Choose the Square D QOB120AS when you need a focused, reliable 20A circuit breaker that integrates seamlessly with Square D panel products and supports consistent protection across distribution panels and motor control centers in both industrial and commercial settings.