---
product_id: 43583495
title: "QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt"
brand: "siemens"
price: "€ 87.80"
currency: EUR
in_stock: true
reviews_count: 13
category: "Siemens"
url: https://www.desertcart.it/products/43583495-qf120a-gfci-circuit-breaker-plug-in-self-testing-20-amp
store_origin: IT
region: Italy
---

# 20 Amp high capacity Self-testing auto safety Lockout on fault detection QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt

**Brand:** siemens
**Price:** € 87.80
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay powered, stay protected — the smart breaker your home deserves!

## Quick Answers

- **What is this?** QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt by siemens
- **How much does it cost?** € 87.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/43583495-qf120a-gfci-circuit-breaker-plug-in-self-testing-20-amp)

## Best For

- siemens enthusiasts

## Why This Product

- Trusted siemens brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Instant Fault Lockout:** Automatically trips and locks out to prevent unsafe resets, ensuring peace of mind.
- • **Effortless Safety Assurance:** Self-tests monthly to guarantee uninterrupted GFCI protection without manual checks.
- • **UL 943 Certified Protection:** Meets stringent safety standards with a 10,000 AIC interrupting rating for ultimate reliability.
- • **Versatile Application Ready:** Ideal for kitchens, bathrooms, spas, and hot tubs—where safety is non-negotiable.
- • **Robust 20 Amp Power Handling:** Supports demanding residential and commercial circuits with reliable 120V operation.

## Overview

The SIEMENS QF120A is a 1-pole, 20 Amp GFCI circuit breaker designed for 120 Volt systems, featuring an advanced self-testing mechanism that automatically verifies functionality monthly. With a 10,000 AIC interrupting rating and lockout feature on fault detection, it ensures superior safety for critical home applications like kitchens, bathrooms, and spas. UL 943 certified, this plug-in breaker combines cutting-edge protection with hassle-free maintenance, making it a top choice for modern smart homes.

## Description

Testing GFCIs and afcis on a monthly basis is a good idea that is sometimes forgotten. Underwriters laboratories (UL) suggests that afci/GFCI Devices be tested every 30 days after installation to ensure they are properly working. Now the new self test & lockout feature enables the dual function circuit breaker to automatically and continuously test itself to ensure that it is working properly. If it is detected that the device has been compromised, the device trips itself and locks out the homeowner from resetting the device, reducing the possibility of the homeowner incorrectly assuming that the device was tripped to prevent a ground/arc fault. This effortless system guarantees that only the best protection is given to your home at all times.

Review: Very good prive - Good price works well in panel box
Review: Works fine - Fine

## Features

- Single pole, 20 Amp, type QPF2 GFCI Circuit Breaker
- 10,000 AIC interrupting rating
- Includes self-test as required by UL 943 as an added safety feature
- Suitable for a variety of construction applications including spas, hot tubs, kitchens, bathrooms, etc.
- Provides class A GFCI protection

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01H04XXQQ |
| Best Sellers Rank | #10,924 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Ground Fault Circuit Interrupters |
| Brand Name | SIEMENS |
| Circuit Breaker Type | GFCI |
| Current Rating | 20 Amps |
| Customer Reviews | 4.7 4.7 out of 5 stars (931) |
| Global Trade Identification Number | 00887621216559 |
| Included Components | One Ground Fault Circuit Interrupter |
| Item Dimensions D x W x H | 1"D x 3"W x 3.1"H |
| Item Type Name | Siemens Ground Fault Circuit Interrupter, 20 Amp, 1 Pole, 120 Volt, 10,000 AIC |
| Item Weight | 0.25 Pounds |
| Manufacturer | Siemens |
| Model | QF120A |
| Mounting Type | Plug-In Mount |
| Number of Poles | 1 |
| Part Number | QF120A |
| UPC | 887621216559 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Warranty Description | 1 Year |

## Product Details

- **Brand:** SIEMENS
- **Circuit Breaker Type:** GFCI
- **Current Rating:** 20 Amps
- **Mounting Type:** Plug-In Mount
- **Product Dimensions:** 1"D x 3"W x 3.1"H

## Images

![QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt - Image 1](https://m.media-amazon.com/images/I/81CcumrWc0L.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Questions & Answers

**Q: Are these items returnable with a full refund? i am ordering them for my electrician. i’m afraid if i get the wrong thing i will be stuck with them.**
A: You can return

**Q: will this work with 6 wag wire?  Or do I need to run a 50 amp at the breaker box and install this at the outlet receptacle box?**
A: This question kinda concerns me. It shows a lack of knowledge of what your doing. This is a 120 volt breaker. 50 amp would be 240 volts and would have two positive wires. Unless your wiring a sub panel. You can’t just connect the two together. As for the question 6 gauge wire will fit but that gauge of wire seams kind of over kill unless you are running a long distance. If you would like you can Google a amperage to wire gauge to distance chart. But if it’s for a sub Panel by all means 50 amp to another 50amp in the new panel and then the 30 amp gfci branched off the new panel. It’s complicated with out knowing all the details. You could click my name and contact me for more info if needed I hope this helped

**Q: Will this work in a Murray panel?**
A: The latest Siemens and Murray panels are compatible and the breakers are approved for either load center.  Typically the breaker and the panel should be the same company to comply the NEC.  Siemens owns Murray and the breakers are identical, the Murray load centers are just a cheaper version of the siemens units.  For the most part if the form factor is correct it will work, for a while ge had issues with afci breakers and was relabeling Siemens breakers.  Siemens, Murray, and GE use the same size breakers.  Technically putting ge in Siemens or Siemens in ge is a code violation, practically speaking it works fine.

**Q: Will this breaker fit in a siemens w0204ml1060u 60 amp outdoor circuit breaker enclosure ?**
A: It should fit correctly, but be aware that the circuit breaker in not for outdoors.
Also the circuit breaker is 40 Amps not 60

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good prive
*by S***I on September 12, 2025*

Good price works well in panel box

### ⭐⭐⭐⭐⭐ Works fine
*by T***L on October 1, 2025*

Fine

### ⭐⭐⭐⭐⭐ Typical of all Siemens High Quality Products
*by S***T on July 7, 2025*

I purchased this breaker for my very humid greenhouse. I wanted to replace the non-GFI breaker in the greenhouse panel. I am a huge fan of Siemens electrical components and was pleased that the breaker fit my off-brand panel perfectly. The breaker is typical of all Siemens high quality products, good value for the money and it doesn't trip unnecessarily. Of course, a breeze to install - just remember to turn off all power to the panel before removing the cover.

## Frequently Bought Together

- SIEMENS QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt
- SIEMENS Q220GF Ground Fault Circuit Interrupter, 20 Amp, 2-Pole GFCI Circuit Breaker Replaces QF220A
- Siemens QF250A Breaker Ground Fault Circuit Interrupter, 50 Amp, 2 Pole, 240 Volt, 10,000 AIC

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-05-13*