Square D QOB115DF Dual Function Miniature Circuit Breaker
- 15A
- 1 Pole
- Bolt-On
Quantity
Square D QOB115DF - 15A Dual Function Miniature Circuit Breaker
New
Quantity
Description
Engineered for comprehensive circuit safety, the Square D QOB115DF delivers combination arc-fault and Class A ground-fault protection. This 15A, single-pole breaker is designed for residential and commercial applications requiring dual function safety under modern NEC standards. Featuring a bolt-on design, it installs securely into Square D NQ panelboards. The unit includes a pigtail neutral and accepts 14-8 AWG wire. Rated 10kAIC at 120V, it includes a Visi-Trip indicator for easy resets.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB115DF |
| Series | QOB |
| Amperage | 15A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | Dual Function (AFCI/GFCI) |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral, Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489, UL 943, UL 1699 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Dual Function (CAFCI/GFCI) |
Product FAQs
5 answersWhat panelboards are compatible with the QOB115DF?
This bolt-on circuit breaker is designed specifically for Square D NQ and legacy NQOD panelboards. It cannot be installed in standard QO load centers, which require plug-on breakers.
What does Dual Function mean on this circuit breaker?
Dual function indicates the breaker provides both Combination Arc Fault Circuit Interrupter (CAFCI) and Class A Ground Fault Circuit Interrupter (GFCI) protection in a single device, meeting National Electrical Code requirements for circuits needing both.
How is the neutral connection handled on the QOB115DF?
This breaker features a pigtail neutral wire. The pigtail must be routed and connected directly to the panelboard neutral bar for the arc fault and ground fault circuitry to function correctly.
What is the difference between the QOB115DF and the QO115DF?
The QOB115DF features a bolt-on mounting connection for commercial NQ panelboards. The QO115DF is the plug-on equivalent designed for residential QO load centers.
Is there a version of this 15A dual function breaker with a higher interrupting rating?
Yes. While the QOB115DF is rated for 10kAIC at 120VAC, the QOB115VHDF is the alternate catalog number that provides a 22kAIC interrupting rating for systems with higher available fault current.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 206 reviews.
- KHKristopher H.Verified BuyerReviewingSquare D QOB120GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/28/26Great Price!
Great price. Fast delivery. My local electric distributor wanted double for the same breaker, so it was a no brainer to order this one. Ordered another one since with the same great service.
- 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.