Square D | QO120AF | Circuit Breaker | 120A | 1-Pole | 120V

The Square D QO120AF circuit breaker is a precise, single‑pole protection device designed for reliable 120V circuits in residential and light commercial panels. With a 120A rating, it provides dependable overcurrent protection for a dedicated hot leg, helping keep your electrical system safe and compliant.

Key reasons to choose the QO120AF for your panel work:

• Exact-fit for Square D QO panels: This breaker is part of the QO family, and the part number QO120AF is the best reference for compatibility. Always confirm fit and ratings before ordering.
• Maintenance, retrofit, and replacement ready: Ideal for servicing existing installations, upgrading aging panels, or stocking up for scheduled maintenance so you’re prepared when a breaker trips or wears out.
• Clear electrical spec: 1‑Pole design for a single hot leg, operating at 120V with a 120A rating—suited to circuits that require higher current protection in a compact, easy-to-install package.

Practical considerations and tips:

• Always verify the exact panel model and slot compatibility using the QO120AF part number as your primary reference before purchasing.
• Follow local electrical codes and use proper safety procedures during installation. If you’re unsure about compatibility or installation, consult a licensed electrician.

Use cases to consider:

• Replacing a damaged or worn one-pole breaker in a residential QO-panel to restore circuit protection for a dedicated 120V circuit such as lighting or outlets on that leg.
• Retrofit scenarios where a panel requires a 1‑pole, 120V solution with a straightforward, reliable form factor for quick servicing.