QO120 - Square D 20 Amp 1 Pole 120/240VAC 10kA Plug-In Circuit Breaker, QO Series, Thermal Magnetic Trip, UL/CSA Listed

Product Overview

The QO120 is a Square D QO Series 1‑pole plug‑in circuit breaker rated 20 A at 120/240 VAC with a 10 kA interrupting rating. It uses a thermal‑magnetic trip mechanism and is listed to UL and CSA standards.

This SKU is sold as a new single unit (part number QO120). Confirm quantity and model number before ordering.

Key Features

• 20 ampere, single‑pole thermal‑magnetic circuit breaker
• 120/240 VAC rating
• 10 kA interrupting rating
• QO Series plug‑in design
• UL and CSA listed

What this breaker does

The QO120 provides overcurrent protection for branch circuits using a thermal‑magnetic trip mechanism. It interrupts excessive load or short‑circuit currents on a 20 A branch circuit.

• Thermal element responds to sustained overloads.
• Magnetic element provides an instantaneous trip response to high fault currents.

Electrical ratings and interrupting capacity

Rated for 20 A operation on systems up to 120/240 VAC. The listed interrupting rating is 10 kA, which is the maximum fault current value associated with this device per manufacturer designation.

• Ampere rating: 20 A
• Poles: 1 (single‑pole)
• Voltage: 120/240 VAC
• Interrupting rating: 10 kA

Panel type and mechanical mounting

The QO120 uses a plug‑in mounting style associated with the Square D QO Series. Verify that your load center or panel accepts QO Series plug‑in breakers before installation.

• Mounting style: plug‑in (QO Series)
• Series: QO

Safety listings

This device is listed to UL and CSA standards.

• Listings: UL, CSA

Before You Order

Confirm the model number and quantity required, and verify that your panel accepts QO Series plug‑in breakers.

• Confirm panel compatibility with QO Series plug‑in breakers.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for QO120 - Square D 20 Amp 1 Pole 120/240VAC 10kA Plug-In Circuit Breaker, QO Series, Thermal Magnetic Trip, UL/CSA Listed. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.