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Square D QOB315 Miniature Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Square D
QOB315
Miniature Circuit Breaker
Brand
Square D
SKU
QOB315
Quantity
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Square D QOB315 - 15A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D QOB315 - 15A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB315 |
| Series | QOB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, REACh, RoHS, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Mercury Free, RoHS Compliant |
Quantity
Square D QOB315 - 15A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB315-R |
| Series | QOB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, REACh, RoHS, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Mercury Free, RoHS Compliant |
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Description
Built for reliable branch circuit protection, the Square D QOB315 is a three-pole miniature circuit breaker suitable for commercial environments. It utilizes thermal-magnetic technology to safeguard systems against overloads and short circuits. This 15-amp device bolts securely into Square D NQ and NQOD panelboards. It requires three panel spaces and accepts 14 to 8 AWG wiring.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB315 |
| Series | QOB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, REACh, RoHS, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Mercury Free, RoHS Compliant |
Product FAQs
5 answersCan I install the QOB315 in a standard Square D QO residential load center?
No. The QOB315 is a bolt-on circuit breaker designed exclusively for Square D NQ and NQOD commercial panelboards. Standard QO load centers require plug-on QO breakers, not bolt-on QOB models.
Are there higher interrupting rating alternatives to the standard QOB315?
Yes. If your panel requires a higher short-circuit current rating than 10 kAIC at 120/240VAC, you can upgrade to the QOB315VH for a 22 kAIC rating or the QHB315 for a 65 kAIC rating. Both share the same physical dimensions and bolt-on mounting style.
Does this breaker feature the Square D Visi-Trip indicator?
Yes, the QOB315 includes the Visi-Trip feature. When a fault causes the breaker to trip, the handle snaps to a midpoint position and reveals a bright red visual indicator for rapid identification in a crowded panelboard.
Is the QOB315 circuit breaker suitable for HVAC equipment?
Yes. This 15-amp miniature circuit breaker is HACR rated, meaning it is certified for use with compatible heating, air conditioning, and refrigeration equipment.
How does the QOB315 connect to the panelboard bus?
It uses a bolt-on mounting configuration. The breaker physically bolts directly to the bus bars of an NQ or NQOD panelboard to ensure a secure, vibration-resistant connection in commercial and industrial environments.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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