Square D QO3020 - 20 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D QO3020 20A, 120V, 1-Pole Plug-In Circuit Breaker—a compact, reliable solution from AmpState for safeguarding electrical circuits. This molded case breaker delivers dependable branch circuit overcurrent and short-circuit protection, designed to snap into compatible panelboards and load centers with ease.

Why this breaker stands out

• Fast plug-in connection: Simplifies installation and replacement, reducing downtime during upgrades or maintenance.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding to both sustained overloads and sudden faults, even as temperatures shift.
• 1-pole, 20A at 120V: Ideal for protecting individual branch circuits in residential, commercial, and light industrial settings.
• OEM compatibility: Specifically designed to work with matching Square D QO load centers and panelboards for a secure, code-compliant fit.
• Durable, molded-case construction: Built to endure routine panel maintenance and the demands of real-world electrical environments.

What it protects and where it’s used

The QO3020 provides essential protection for branch circuits against overcurrent and short circuits. With its plug-in mounting and QO-series compatibility, it’s well-suited for service panels in homes, small commercial spaces, and light industrial facilities where quick replacements and reliable trip performance matter most.

Technical snapshot

• Manufacturer: Square D
• Part number: QO3020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips and best practices

When upgrading or expanding an electrical panel, choose a breaker that explicitly matches the panel’s labeling and the QO family to ensure a seamless fit and compliant protection. The plug-in design is especially beneficial during panel maintenance or when adding new circuits, as it minimizes downtime and wiring complexity while maintaining solid, code-compliant protection.