Square D QO-3201021 QO 3-Pole Shunt Trip Miniature Circuit Breaker, 120/240VAC, 10kA

Square D QO 3-Pole Shunt Trip Miniature Circuit Breaker, 120/240VAC, 10kA

The Square D QO 3-pole miniature circuit breaker delivers thermal magnetic overcurrent protection and switching for AC and DC systems, rated 120/240VAC (also available at 240VAC and 120VAC) with a 10kA interrupt rating. This QO range breaker is offered across a family of Motor FLA ratings from 20A through 100A, so electrical professionals can select the correct current rating for the connected motor load while every option shares the same trip-free toggle design, shunt trip accessory compatibility, and 120/240VAC voltage platform. Built with an over-center, trip-free toggle mechanism for quick-make, quick-break action, the breaker includes an AC shunt trip accessory rated 120/208/240VAC for remote tripping. It is UL Listed and CSA certified, making it a reliable choice for plug-in panelboard installations that demand dependable, code-compliant circuit protection.

Key Features

• Pole Configuration: 3-pole (3P) design for multi-circuit overcurrent protection and switching.
• Motor FLA Range: Available in 20A, 50A, 80A, and 100A ratings to match a range of motor load requirements.
• Trip-Free Toggle Mechanism: Over-center, trip-free toggle with quick-make, quick-break action for positive, reliable operation on AC and DC systems.
• Voltage Rating: Rated 120/240VAC (also available at 240VAC and 120VAC) to match a range of residential and light commercial applications.
• Interrupt Rating: 10kA interrupt rating for dependable fault protection.
• AC Shunt Trip Accessory: Shunt trip rated 120/208/240VAC enables remote tripping of the breaker for added control and safety.
• Wire Range: Accepts AWG 8...AWG 2 copper or aluminum conductors for flexible field wiring.
• Circuit Breaker Application: HACR rated for heating, air conditioning, and refrigeration circuit protection.
• Operating Temperature: Rated for ambient air temperature up to 40°C.
• Space Requirement: Requires 4 panel spaces in compatible QO load centers and panelboards.

Certifications & Compliance

• UL Listed
• CSA Certified
• HACR Rated

Technical Specifications

• Series: QO
• Standards: CSA
• Poles Description: 3P
• Number Of Spaces Required: 4
• Warranty: 18 months
• Mercury Free: Yes
• Toxic Heavy Metal Free: Yes
• Without Single Use Plastic: Yes

Typical Applications

• Residential and Light Commercial Load Centers
• Plug-In Panelboard Overcurrent Protection
• AC and DC Circuit Protection Systems
• HACR Circuits (Heating, Air Conditioning, Refrigeration)
• Motor Overload Circuits Across a Range of FLA Ratings
• Remote Tripping Applications via AC Shunt Trip Accessory

Why Square D?

Square D engineers the QO range of miniature circuit breakers for dependable, code-compliant performance, backed by UL Listing and CSA certification. This breaker is a Green Premium product that is mercury-free, halogen-free, and built without single-use plastic, giving electrical professionals a trusted, reliable solution across the full 20A-100A Motor FLA range for plug-in panelboard installations.