Square D | QOB120AFI | Circuit Breaker | 20A | 1-Pole | Bolt-On

The Square D QOB120AFI Circuit Breaker is a 20-amp, 1-pole bolt-on protection device designed for exact-match replacements in compatible Square D panels. Built for maintenance, retrofit, and replacement projects, this part-reference ensures you’re choosing the right spec when a precise fit matters.

Key specifications

• Amperage: 20A
• Poles: 1-Pole
• Mounting: Bolt-On
• Part number: QOB120AFI
• Applications: Maintenance, retrofit, and replacement where matching specs are required

Why this model stands out

• Exact-fit compatibility: The part number QOB120AFI is your best reference for ensuring compatibility with your Square D panel system.
• Secure bolt-on mounting: The bolt-on design delivers a solid, vibration-resistant connection that remains dependable under panel load conditions.
• Reliability for critical circuits: Designed to provide consistent overcurrent protection for essential lighting, outlets, and branch circuits in residential or light commercial settings.
• Easy retrofit and replacement: Ideal for scheduled maintenance or panel upgrades where you need to replace a failed breaker with an exact spec.

Ideal use cases

• Replacing a failed 20A single-pole breaker in compatible Square D panels.
• Retrofit projects where existing equipment requires matching QOB-series specifications.
• Stocking spare breakers for quick-downtime repairs in maintenance environments.

Installation and compatibility tips

• Always confirm fit and ratings before ordering. Use the part number QOB120AFI as the primary compatibility reference.
• Ensure the panel is designed for a 1-Pole, 20A bolt-on breaker of the QOB family before installation.
• Power down the service and follow standard electrical safety procedures prior to replacement or retrofit work.
• Keep in mind that bolt-on breakers require proper torque on mounting screws to maintain a secure connection.

For dependable, code-compliant overcurrent protection in your Square D panel, the QOB120AFI 20A 1-Pole Bolt-On Circuit Breaker delivers precise compatibility, robust mounting, and reliable performance when it’s time to maintain or upgrade your electrical distribution system.