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Square D QOB120CAFI AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Square D
QOB120CAFI
AFCI Miniature Circuit Breaker
Brand
Square D
SKU
QOB120CAFI
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Square D QOB120CAFI - 20A AFCI Miniature Circuit Breaker
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Description
Providing advanced combination arc-fault detection, this 20-amp single-pole breaker safeguards against both parallel and series arcing events. It fastens securely into Square D NQ and NQOD panelboards via a reliable bolt-on connection and includes a standard pigtail neutral wire. Rated for 10kAIC at 120VAC, the unit features the highly visible Visi-Trip indicator to quickly identify tripped circuits during maintenance or troubleshooting in commercial and residential environments.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB120CAFI |
| Series | QOB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | AFCI |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 489, UL 1699, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersCan I install the QOB120CAFI in a standard QO load center?
No. The QOB120CAFI is a bolt-on circuit breaker designed specifically for Square D NQ and NQOD panelboards. Standard QO load centers require plug-on breakers, such as the QO120CAFI.
Does this breaker use a plug-on neutral or a pigtail neutral connection?
The QOB120CAFI features a standard pigtail neutral connection. The attached white wire must be routed and connected directly to the neutral bus bar in the panelboard.
What does the CAFI designation mean on this breaker?
CAFI stands for Combination Arc Fault Circuit Interrupter. It provides advanced protection by detecting both series and parallel arcing events, reducing the risk of electrical fires.
Is there a dual-function version of this 20A bolt-on breaker?
Yes. If your application requires both arc-fault (AFCI) and ground-fault (GFCI) protection on the same circuit, you will need the dual-function QOB120DF instead of the QOB120CAFI.
What is the recommended terminal tightening torque for the QOB120CAFI?
The standard terminal torque for 10A to 30A QO and QOB circuit breakers is 36 lb-in (4 N-m). Always verify the exact torque specifications printed on the breaker label before installation.
How does the Visi-Trip indicator work on this breaker?
When the QOB120CAFI trips due to an arc fault, overload, or short circuit, the handle snaps to a center position and a highly visible red indicator appears in a window. This allows you to quickly identify the tripped breaker in a crowded panelboard.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 205 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 3/11/26
Customers say these electrical breakers arrive exactly as ordered and work perfectly for their intended applications. They consistently praise the competitive pricing, which many report is significantly lower than local suppliers. Fast shipping and prompt delivery are frequently highlighted, with many receiving orders within days or even next-day delivery for urgent needs. The breakers arrive well-packaged and in excellent condition. Many reviews emphasize the company's extensive inventory availability, particularly for hard-to-find breakers. One customer experienced difficulty with order cancellation and was charged a restocking fee, which caused dissatisfaction.
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Rating
205 reviews
- BLBOOSTIX L.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/17/26QOB220
That's nice breakers!
- PHPaul H.Verified BuyerReviewingSquare D QOB330 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26Quick shipping and delivery
Shipped and delivered on time for installation at one of our projects. Thank you!
- RMRick M.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Project Mgr
Just what I needed.
- DHDoug H.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Square D QOB breakers
As always, our order arrived timely, and accurate. You can’t beat their prices that’s why we have used this company for years.
- RKRyan K.Verified BuyerReviewingSquare D QOB230VH - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26Awesome
Worked great