Looking for a compact, simple circuit breaker for light duty? These breakers make your job a little easier.
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Product Training Product Safety Product Guides Product News Featured ProductsIf you need a dependable, compact, and simple circuit breaker for your property or facility, the Square D QO Series Circuit Breakers are a fantastic choice. These breakers are well-known for their endurance and unique features. They provide thermal magnetic protection to keep your electrical systems safe from overloads and short circuits. Whether you’re working on a new installation or upgrading an old panel, Square D molded case QO breakers make your job a little easier.
Square D QO Series Plug-On Breakers 15 to 225 amps
The QO Series can be identified by its plug-on construction, which makes for quick and easy circuit breaker installation. Also, the Visi-Trip Indicator provides a visual indicator when a breaker has tripped, letting you recognize problems without guesswork. These breakers are designed to work with Square D load centers and are great for domestic and light commercial applications like small offices, retail spaces, and backup power systems. With amperage values ranging from 15 to 225 amps, you can pick a breaker that meets your needs.
Key Features of QO Series Circuit Breakers
- Thermal Magnetic Protection: Protects circuits from overloads and short circuits.
- Compact Design: Saves space in your electrical panel.
- Plug-On Neutral: Simplifies wiring, especially in load centers.
- Visi-Trip Indicator: Quickly identifies a tripped breaker.
- Wide Range of Models: From standard QO breakers to specialized QO-CAFI (Combination Arc Fault) and QO-GFI (Ground Fault) options.
QO Breaker Load Centers are combined with QO ¾” circuit breakers with Visi-Trip. They feature shielded tin-plated copper bus bars and backed-out neutral terminal screws. QO, a PoN system for enclosures with 12 spaces or more, is solar-ready, has smart panel capability, and has completely switchable mains and top or bottom feed.
Choosing the Right Square D QO Breaker for Your Application
| Breaker Type | Application | Key Features |
|---|---|---|
| Standard QO Breaker | General circuit protection | Thermal magnetic protection |
| QO-GFI Breaker | Bathrooms, kitchens, outdoor circuits | Ground Fault Interruption (GFI) |
| QO-CAFI Breaker | Bedrooms, living areas | Combination Arc Fault Interruption |
| QOT Tandem Breaker | Limited panel space | Fits two circuits in one slot |
| QO-AFI Breaker | Home offices, light commercial areas | Arc Fault Interruption (AFI) |
Install Square D QO Breakers
Installing a Square D QO breaker is straightforward, but always prioritize safety. Make sure the main breaker is turned off before starting, and follow the panel’s installation guide. The plug-on design makes these breakers easier to connect. However, if you’re unsure, hiring a licensed electrician is always a smart choice. Proper installation means your system works safely and efficiently.
Popular QO Breaker Models and Applications
| Model Number | Application |
| QO115 | General-purpose 15A circuit protection |
| QO120 | General-purpose 20A circuit protection |
| QO230 | Double-pole 30A protection for appliances |
| QO115GFI | 15A Ground Fault Interruption (GFI) |
| QO120CAFI | 20A Combination Arc Fault (CAFI) |
| QO250 | Double-pole 50A for subpanels or HVAC |
| QO215H | Plug-on neutral, 15A, for QO panels |
| QOT2020 | Tandem breaker, two 20A circuits in one |
| QO220GFI | 20A Ground Fault for outdoor circuits |
| QO215GFI | 15A Ground Fault Interruption (GFI) |
FAQs: Test Your Knowledge
🟩 1. What makes Square D QO breakers different from HOM breakers?
🟥 QO breakers are higher quality with features like the Visi-Trip Indicator and compact design, while HOM breakers are designed for more budget-conscious projects.
🟩 2. Can QO breakers be used in commercial applications?
🟥 Yes, QO breakers are suitable for light commercial applications like small offices, retail stores, and backup generator systems.
🟩 3. Are QO breakers compatible with other breaker panels?
🟥 QO breakers are designed specifically for Square D QO load centers and may not fit panels from other manufacturers.
🟩 4. What does the Visi-Trip Indicator do?
🟥 The Visi-Trip Indicator provides a visual signal on the breaker, showing when it has tripped, making it easy to identify issues.
🟩 5. Do QO breakers meet safety standards?
🟥 Yes, all QO breakers are UL-listed, ensuring they meet the highest safety and performance standards.
Whether you’re doing residential electrical work or wiring breaker load centers in a commercial space, the Square D QO Series provides safe and efficient protection. From standard breakers to specialized models like QO-GFI and QO-CAFI, there’s a breaker for every need. Their plug-on design and Visi-Trip Indicator, QO breakers make your electrical projects easier and safer.
Find more circuit breaker tips and advice here. And if you’re ready to upgrade or expand your electrical system, explore our wide range of Square D QO breakers, contact us today for expert circuit protection, electrical parts and product support.