Square D QOB320SWN Miniature Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Square D
QOB320SWN
Miniature Circuit Breaker
Brand
Square D
SKU
QOB320SWN
Quantity
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Square D QOB320SWN - 20A 3 Pole Miniature Circuit Breaker
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Description
Designed for specialized commercial applications, the QOB320SWN provides thermal-magnetic protection while simultaneously switching the grounded neutral conductor. This 3-pole, 20A breaker is part of the Square D QO family. It installs into Square D NQ and NQOD panelboards using a secure bolt-on connection. The panel neutral connection utilizes the built-in pigtail lead. Rated for 10kAIC at 120/240VAC, this switch neutral breaker ensures compliance with NEC requirements.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB320SWN |
| Series | QOB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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 | Pigtail |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Switch Neutral, Mercury Free, RoHS Compliant |
| Special Features | Switching Neutral |
Product FAQs
6 answersWhat does the SWN suffix indicate on the QOB320SWN?
The SWN suffix designates this as a Switched Neutral circuit breaker. It is engineered to simultaneously open the grounded neutral conductor along with the ungrounded conductors, a feature required by NEC Article 514.11 for specialized commercial applications like fuel dispensing equipment.
How many panel spaces does the QOB320SWN occupy?
This 3-pole breaker requires three spaces in a Square D NQ or NQOD panelboard. It is designed for a 3-wire 120/240VAC circuit, utilizing two poles for the hot legs and the third pole to switch the neutral.
How is the neutral connection made to the panelboard?
The QOB320SWN features a built-in pigtail wire. This pigtail must be routed and connected directly to the neutral assembly in the NQ or NQOD panelboard to complete the circuit.
Can the QOB320SWN be installed in a standard QO load center?
No. The QOB320SWN features a bolt-on mounting design intended strictly for Square D NQ and NQOD panelboards. Standard QO load centers require plug-on style breakers.
Is the QOB320SWN interchangeable with a standard 3-pole QOB320 breaker?
No. While both occupy three spaces, a standard QOB320 is designed for 3-phase systems to switch three hot legs. The QOB320SWN is a switched neutral breaker for 120/240VAC single-phase systems, switching two hot legs and one neutral.
How does the QOB320SWN indicate a tripped condition?
This breaker includes Square D's Visi-Trip visual indicator. When the breaker trips due to an overcurrent or short circuit, a red flag appears in the indicator window, allowing electricians to quickly identify the faulted circuit in a crowded panel.
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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