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    Square D™ Dual Function Circuit Breakers

    Advanced Ground Fault and Combination Arc Fault protection in one circuit breaker.

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Save Time and Money With Advanced Ground Fault and Combination Arc Fault Protection In One Device


The innovative Square D QO™ and Homeline™ Dual Function Circuit Breakers by Schneider Electric save space and installation time while meeting all code requirements. Available in both standard pigtail and time-saving Plug-on Neutral configurations, these circuit breakers combine two state-of-the-art technologies — Combination Arc Fault and Ground Fault (class A) protection — into one easy-to-install device.

The new Dual Function circuit breakers reduce time, labor, and eliminate the hassle of using two separate devices to provide critical protection. Find helpful information about dual function circuit breakers whether you’re a contractor, builder, inspector, or homeowner.

Learn more about product features and benefits!

Download the brochure

Make Your Job Easier and Reduce Costs

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    Less Parts, Better Protection

    Eliminate the hassle of using two separate devices to provide critical protection.

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    Quick and Easy to Install

    Designed for reliability and easy installation, saving you time and money.

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Electrical Contractor Support

Get direct access to product information, order tracking, training, and technical support to simplify your projects and increase profitability.

Simplify Installation and Reduce Inventory


Whether you choose the standard pigtail or the time-saving Plug-on Neutral Square D™ QO™ and Homeline™ Dual Function Circuit Breaker, your installation is sure to be efficient. These innovative circuit breakers combine two state-of-the-art technologies — Combination Arc Fault and Ground Fault (class A) protection — into one easy-to-install device. Square D™ Dual Function circuit breakers give contractors a better solution by reducing cost and eliminating the hassle of using two separate devices to provide critical protection.

Quick Plug-on Neutral Connections

QO Plug-on Neutral (PoN) Load Centers interiors are engineered to accept PoN CAFI circuit breakers for a quick Plug-on Neutral connection on every circuit. Designed for reliability, and a time and labor saving installation, the QO Plug-on Neutral Load Center contains an extended neutral bar that directly connects to the QO Plug-on Neutral CAFI circuit breakers.

Easier Than AFCI Receptacles

AFCI receptacles are harder to install than standard receptacles. Every electrician knows how hard it is to squeeze all that wire into the small outlet box. You can also accidentally break the wire feed, causing rework. Simplify your installation by using a Dual Function circuit breaker, and remove the wiring headache by using standard receptacles.

One Centralized Location

You no longer have to hunt for the tripped GFCI outlet when using Dual Function circuit breakers. Everything is at the load center. Just look for the purple test button.

Advantages of Dual Function Beyond Kitchen and Laundry Circuits

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    No More Long Runs

    Eliminate the need for long runs to catch outdoor GFI receptacles — saving time, reducing labor, and room for errors like nicked wires.

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    Save Time and Money

    Save time, money, and reduce inventory by tying into the adjacent circuits of rooms already required to have AFCI protection.

Safer Homes With Dual Function Circuit Breakers

Electrical Fires (183408629-IC-410x230)

The innovative Square D QO™ and Homeline™ Dual Function Circuit Breakers combine two critical, state-of-the-art technologies — Combination Arc Fault and Ground Fault (Class A) Protection — into one circuit breaker, making it the safest solution for the home. Dual Function Circuit Interrupters provide a higher level of protection than any other residential circuit breaker. Where installed, these devices protect the entire circuit, not just a part of the circuit like electronic receptacles do (GFCI or AFCI).

TIME SAVER Diagnostics Feature

Troubleshoot Circuit Issues
All Dual Function circuit breakers are equipped with TIME SAVER Diagnostics. This feature helps contractors and homeowners identify the type of fault that last occurred and get detailed circuit information at the touch of a button. The TIME SAVER Diagnostics sequence is simple and easy to use and requires no tools or special training. Eliminate the guesswork with TIME SAVER Diagnostics.

Why Homes Need Dual Function Circuit Breaker Protection

Today, our dependence on electricity is increasing, and we are expecting more out of our home’s electrical system. According to the U.S. Census Bureau, half of the homes in use in the United States were built prior to 1973, before many of the electronics and appliances we use today were even invented. Unfortunately, our increased demands for energy can overburden an older home’s electrical system causing fires or electrocutions.

The National Electrical Code (NEC) requirements for arc fault protection also continue to expand. The NEC now requires protection for bedrooms, family rooms, living rooms, dens, home offices, and other similar rooms. Square D™ by Schneider Electric™ Electrical Distribution System provides reliable protection against electrical hazards in the home that may have gone undetected in years past.

Electrical Fires and Older Homes

More than 30,000 electrical fires occur in homes every year, resulting in hundreds of deaths, injuries, and more than a billion dollars in property damage. Many electrical fires occur in aging homes. Electrical fires can be devastating and lethal since they often occur when we least expect them, and in locations that may be hidden from view.

More to Learn
Homeowner’s Guide to Preventing Electrical Fires

US Electrical Fires 2010-2014*

  • 32,000 Annual fires in home electrical systems.
  • 400 / 1180 400 civilian deaths. 1,180 civilian injuries.
  • $1.2 Billion Direct property damage.

Fire Statistics Support Using AFCIs

Electrical fires are a significant issue. The NFPA Home Electrical Fires Fact Sheet indicates that wiring and related equipment were involved in 63% of electrical fires and half of the associated deaths in 2007-2011. Frequently, it is argued that fires only occur in older homes. However, new homes become older homes. It is critical to install the AFCIs (arc fault circuit interrupters) during construction so that they can protect homes from the start. The U.S. Department of Housing and Urban Development (HUD) recommends promoting AFCIs as one of the many devices that can be used to prevent burns and fire related injuries, and cites the 1999 CPSC Report recommending the use of AFCIs to "prohibit or reduce potential electrical fires from happening."

More to Learn

* The Federal Government, the National Fire Protection Association, and US fire departments track the incidence of electrical fires across the United States and categorize those fires based on their causes. Source: US Home Structure Fires 9/16 NFPA Research.

Know the Code Specifications

There are only 6 approved ways provide AFCI protection on a circuit. Do you know the code? See the National Electrical Code (NEC) specification.

Code Adoption Map

Learn more about which code is in effect in your state or jurisdiction. Visit the Electrical Code Coalition for more detailed information.

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Square D™ Advanced Function Breakers

Download the Square D Advanced Function Breakers brochure to learn about product features and benefits.
(pdf, 5.1MB)
Download the brochure