---
title: "What Is Dual-function breaker? Electrical Glossary"
description: "A dual-function breaker combines arc-fault and ground-fault protection in one breaker, so a single device guards a circuit against both hazards."
url: https://danielelectric.multisites.ai/glossary/dual-function-breaker
publisher: Daniel Electric
phone: +1-817-481-8606
quote: https://danielelectric.multisites.ai/contact
---

Safety devices

# Dual-function breaker

A dual-function breaker combines arc-fault and ground-fault protection in one breaker, so a single device guards a circuit against both hazards.

Siemens says its residential dual function circuit breakers combine Class A 5mA GFCI and AFCI protection. Leviton explains that the "dual function" name means AFCI plus GFCI, and that these breakers also give combination-type AFCI protection against parallel and series arcing. One breaker then covers [AFCI](https://danielelectric.multisites.ai/glossary/afci) and [GFCI](https://danielelectric.multisites.ai/glossary/gfci) duty.

Dual-function protection also comes as an outlet. The breaker version sits in the [breaker panel](https://danielelectric.multisites.ai/glossary/breaker-panel) and protects the whole circuit. Adding or swapping a breaker means working inside a live panel, so call a licensed electrician. See [GFCI vs AFCI](https://danielelectric.multisites.ai/guides/gfci-vs-afci).

[Daniel Electric can helpElectrical panel repair and replacement](https://danielelectric.multisites.ai/electrical-panel-repair-replacement)

## Related terms

-   [AFCI](https://danielelectric.multisites.ai/glossary/afci)
-   [GFCI](https://danielelectric.multisites.ai/glossary/gfci)
-   [Circuit breaker](https://danielelectric.multisites.ai/glossary/circuit-breaker)
-   [Breaker panel](https://danielelectric.multisites.ai/glossary/breaker-panel)

## Sources

1.  [Siemens: Residential dual function circuit breakers (AFCI and GFCI)](https://www.siemens.com/en-us/products/low-voltage/residential-dual-function-circuit-breakers/)
2.  [Leviton: Is The Dual Function AFCI/GFCI The Same as a Combination AFCI?](https://leviton.com/support/resources/product-support/protection-devices-and-receptacles/dual-function-afci-gfci/is-the-dual-function-afci-gfci-the-same-as-a-combination-afc)

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## Need an electrician in Southlake?

Call and tell us what is going on. A photo of the panel label or the problem helps us come prepared. Quotes on new installations are free.

[Call (817) 481-8606](tel:+1-817-481-8606)[Get a quote](https://danielelectric.multisites.ai/contact)

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