Square D QOB315SWN Miniature Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Square D
QOB315SWN
Miniature Circuit Breaker
Brand
Square D
SKU
QOB315SWN
Quantity
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Square D QOB315SWN - 15A 3 Pole Miniature Circuit Breaker
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Description
Part of the QO family, the Square D QOB315SWN is a 15A, three-pole miniature circuit breaker. It utilizes thermal-magnetic technology for dependable overload protection. This bolt-on unit is compatible with Square D NQ and NQOD panelboards. It features pressure plate terminals that accept 14-8 AWG wire. The defining feature is its switch neutral (SWN) capability, disconnecting the neutral along with the line poles. It also includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB315SWN |
| Series | QOB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | NQ Panelboards, 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No 5, RoHS, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Common Trip |
| Special Features | Switching Neutral |
Product FAQs
8 answersWhat does the "SWN" suffix mean on the QOB315SWN?
The "SWN" suffix indicates that this is a Switching Neutral circuit breaker. It is designed to simultaneously open all ungrounded (hot) and grounded (neutral) conductors, which is commonly required by the NEC for applications like gas pump dispensers.
What applications typically require a switching neutral breaker?
Switching neutral breakers are most commonly used to protect gas pump assemblies and fuel dispensers. The National Electrical Code (NEC) requires that all conductors, including the neutral, be disconnected simultaneously in these specific hazardous locations.
Is the QOB315SWN used for 3-phase circuits?
While it is a 3-pole breaker, it is rated for 120/240VAC systems. In a switching neutral application, it is used to switch two hot legs and one neutral leg of a single-phase 3-wire circuit, rather than three hot legs of a 3-phase system.
How many panel spaces does the QOB315SWN require?
This 3-pole breaker requires three standard spaces in a Square D NQ or NQOD panelboard. In a switching neutral application, it uses these three poles to switch two hot lines and one neutral line.
How is the neutral connection made on the QOB315SWN?
All branch circuit wiring, including the neutral, terminates directly on the load side of the circuit breaker. The connection to the panelboard neutral bus is made using the factory-installed pigtail wire built into the breaker.
Can the QOB315SWN be installed in a standard QO load center?
No. This breaker features a bolt-on mounting design and is specifically intended for use in Square D NQ and NQOD panelboards. Standard QO load centers require plug-on breakers.
What is the plug-on equivalent to the QOB315SWN?
If you need this same 15A switching neutral breaker for a standard QO load center rather than a bolt-on panelboard, the correct plug-on catalog number is QO315SWN.
Does the QOB315SWN include a tripped indicator?
Yes, it features the Square D Visi-Trip indicator. When the breaker trips due to an overload or short circuit, the handle snaps to a center position and a highly visible red indicator appears in a window on the breaker face.
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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