Square D QO120EPD - 20 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

The Square D QO120EPD is a single-pole, 20A plug-in circuit breaker designed for fast, dependable protection of 120V branch circuits in residential panels, commercial setups, and light industrial environments. Built to be a seamless fit with your existing QO load centers, this molded-case breaker puts safety and reliability at the forefront of every install.

Why this matters for your electrical system:

• Fast plug-in connection — swap or upgrade circuits in minutes without complex wiring, reducing downtime and service interruptions.
• Thermal-magnetic trip unit — delivers stable, repeatable protection across a range of temperatures and load conditions, helping prevent nuisance trips while reliably interrupting short circuits and overloads.
• Exact fit for Square D QO panels — engineered to work with matching OEM panelboards and load centers, ensuring compatibility and a straightforward replacement experience.
• Versatile, single-pole design — ideal for single-phase residential circuits and selected commercial applications where 120V protection is required.

Ideal use cases

daftar: This 20A, 120V plug-in breaker is well-suited for protecting lighting circuits, outlet runs, or dedicated equipment branches in homes, small offices, retail spaces, and light manufacturing areas. It’s a practical choice when you need a reliable safety device that you can install or replace quickly in compatible panelboards.

What makes it unique

• Plug-in convenience without compromising safety — designed for rapid insertion into compatible panels, so you can restore protection with minimal downtime.
• Precise protection with real-world reliability — the thermal-magnetic mechanism responds to overloads and short circuits with predictable trip behavior, reducing unintended interruptions in daily use.
• OEM-aligned performance — specifically matched to Square D QO series panels for consistent electrical performance and a cohesive safety system.

Technical snapshot

• Manufacturer: Square D
• Part Number: QO120EPD
• 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 for best results

• Confirm panel compatibility with the QO single-pole form factor before replacement or installation.
• Use as part of a labeled, organized protection plan for circuits serving lighting, receptacles, and dedicated equipment.
• Store spares in a controlled environment to maintain reliable trip performance when needed.