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Square D QOB315GFI GFCI Miniature Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Square D
QOB315GFI
GFCI Miniature Circuit Breaker
Brand
Square D
SKU
QOB315GFI
Quantity
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Square D QOB315GFI - 15A GFCI Miniature Circuit Breaker
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Description
Securing into NQ and NQOD panelboards via bolt-on mounting, this 15-amp three-pole breaker ensures robust connections in commercial and industrial environments. It supplies Class A 6mA ground-fault protection for 208Y/120V three-phase systems requiring strict NEC compliance. The unit includes a pigtail neutral wire and features the Visi-Trip visual indicator to quickly spot tripped circuits.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB315GFI |
| Series | QOB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 208Y/120VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 208Y/120VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 12-4 AWG (Al), 14-6 AWG (Cu) |
| Max Wire | 4 AWG (Al), 6 AWG (Cu) |
| Min Wire | 12 AWG (Al), 14 AWG (Cu) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFCI |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
| Accessories | Pigtail Neutral, Load Side Lugs Included |
| Standards | CSA C22.2 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator |
Product FAQs
5 answersDoes the QOB315GFI require a load neutral connection?
No. Square D 3-pole QOB-GFI breakers do not have a load neutral terminal. They are designed for 3-wire, 208Y/120VAC loads. The included pigtail neutral must still be connected to the panel neutral bus to power the internal GFCI electronics.
What is the ground fault trip threshold for this breaker?
The QOB315GFI provides Class A ground fault protection, which is designed to trip when a ground fault of 4 to 6 milliamps (mA) is detected.
Can I install the QOB315GFI in a standard QO load center?
No. The QOB315GFI features a bolt-on mounting design intended for Square D NQ and NQOD panelboards. Standard QO load centers require plug-on breakers.
What is the plug-on equivalent for the QOB315GFI?
The plug-on equivalent is the Square D QO315GFI. It shares the same 15A, 3-pole, and GFCI specifications but features a plug-on mounting design for QO load centers.
Can this breaker be used on a 240V delta system?
No. The QOB315GFI is specifically rated for 208Y/120VAC solid-grounded wye systems. It is not suitable for 240V delta, high-leg delta, or 480V systems.
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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