---
product_id: 43583495
title: "QF120A Gfci Circuit Breaker, Plug In, Self Testing, 20 Amp, 1-Pole, 120 Volt"
brand: "siemens"
price: "2931627₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Siemens"
url: https://www.desertcart.vn/products/43583495-qf120a-gfci-circuit-breaker-plug-in-self-testing-20-amp
store_origin: VN
region: Vietnam
---

# 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:** 2931627₫
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay protected, stay worry-free — the breaker that never sleeps!

## 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?** 2931627₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/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

- • **Plug-In Convenience:** Easy installation with plug-in mounting, perfect for professional upgrades or DIY projects.
- • **Powerful 20 Amp Capacity:** Handles high-demand circuits in kitchens, bathrooms, spas, and more with ease.
- • **UL-Certified Reliability:** Meets UL 943 standards with a robust 10,000 AIC interrupting rating for trusted performance.
- • **Ultimate Fault Prevention:** Automatically trips and locks out to prevent unsafe resets, ensuring your home’s safety.
- • **Effortless Safety Assurance:** Self-tests monthly to guarantee uninterrupted GFCI protection without manual checks.

## 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 checks functionality monthly. It provides Class A ground fault protection with a 10,000 AIC interrupting rating and a lockout feature that prevents unsafe resets, making it ideal for high-risk areas like kitchens, bathrooms, and spas. Plug-in mounting ensures easy installation, backed by UL 943 certification for uncompromising safety and reliability.

## 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: No complaints, does it's job and trips when tested with GFCI tester. - Works as intended.

## 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 | #26,119 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Ground Fault Circuit Interrupters |
| Brand | SIEMENS |
| Circuit Breaker Type | GFCI |
| Current Rating | 20 Amps |
| Date First Available | June 19, 2016 |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00887621216559 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4 ounces |
| Item model number | QF120A |
| Manufacturer | Siemens |
| Mounting Type | Plug-In Mount |
| Number Of Poles | 1 |
| Product Dimensions | 1"D x 3"W x 3.1"H |
| UPC | 887621216559 |
| Voltage | 120 Volts |

## 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

### ⭐⭐⭐⭐⭐ No complaints, does it's job and trips when tested with GFCI tester.
*by W***. on October 29, 2025*

Works as intended.

### ⭐⭐⭐⭐⭐ 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 Vietnam*
*Store origin: VN*
*Last updated: 2026-02-04*