Square D QOB QO 22kA Bolt-On Miniature Circuit Breaker

Square D QO 22kA Bolt-On Miniature Circuit Breaker

The Square D QO 22kA Miniature Circuit Breaker is a thermal magnetic circuit breaker from the QO range, built for overcurrent protection and switching on AC and DC systems. This bolt-on breaker is offered across a Motor FLA range spanning 10A, 15A, 30A, 35A, 40A, 50A, 60A, 70A, 90A, and 150A, letting you match the exact rating to your motor circuit while retaining the same 22kA interrupt rating, HACR listing, and bolt-on mounting across every option. Available in 1, 2, and 3-pole configurations rated for 120 V AC or 120/240 V AC systems, it accepts AWG 8...AWG 2 copper or aluminum conductors, making it a dependable choice for panelboard upgrades and new installations.

Key Features

• Motor FLA Range: Available from 10A up to 150A, allowing selection of the rating that matches your specific motor load.
• QO Range: Part of the Square D QO family of thermal magnetic circuit breakers, available in 1, 2, and 3-pole configurations.
• Mounting: Bolt-on connection secures the breaker firmly to the panelboard bus for a reliable installation.
• Interrupt Rating: 22kA interrupt capacity supports higher fault-current applications than standard QO breakers.
• Trip Mechanism: Over-center, trip-free toggle mechanism provides quick-make, quick-break switching with positive trip indication.
• Voltage Rating: Rated for 120 V AC or 120/240 V AC operation depending on pole configuration.
• Wire Range: Accepts AWG 8...AWG 2 copper or aluminum conductors.
• Operating Temperature: Rated for ambient air operation up to 40 °C.
• Application: HACR rated for heating, air conditioning, and refrigeration circuits.

Certifications & Compliance

• UL Listed
• CSA Certified
• RoHS Compliant
• Mercury Free

Technical Specifications

• Series: QO
• Voltage Rating: 120/240 VAC
• Standards: CSA
• Toxic Heavy Metal Free: Yes
• Warranty Period: 18 months
• Mercury Free: Yes
• Range Of Product: QO
• Environmental Disclosure: ENVPEP2111016

Typical Applications

• Residential and Commercial Panelboards
• Load Center Circuit Protection
• HACR Equipment Circuits (Heating, Air Conditioning, Refrigeration)
• Motor Circuit Protection Across a Range of FLA Ratings
• Higher Fault-Current Electrical Systems
• New Construction and Panel Upgrades

Why Square D?

Square D by Schneider Electric engineers the QO breaker line for reliable, code-compliant circuit protection, backed by an 18-month warranty and UL Listed, CSA certified construction. The trip-free toggle mechanism and bolt-on mounting are built for consistent performance in panelboard environments across the full Motor FLA lineup, while RoHS-compliant and mercury-free construction supports responsible manufacturing.