Square D QOB220SWN Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Square D
QOB220SWN
Miniature Circuit Breaker
Brand
Square D
SKU
QOB220SWN
Quantity
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Square D QOB220SWN - 20A 2 Pole Miniature Circuit Breaker
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Description
Built for specialized commercial applications like fuel dispensing pumps, this 20A device simultaneously disconnects ungrounded and grounded conductors. The bolt-on unit fits standard Square D NQ and NQOD panelboards, ensuring a rigid mechanical connection to the busbar. Featuring a dedicated pigtail neutral and Visi-Trip indicator, it delivers 10kAIC protection at 120VAC while meeting strict NEC requirements for circuits requiring a switched neutral disconnect.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB220SWN |
| Series | QOB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 5kA @ 48VDC |
| 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 | Pigtail Neutral, Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Quick-Make/Quick-Break, Trip-Free Mechanism, Common Trip |
| Special Features | Switching Neutral |
Product FAQs
8 answersWhich panelboards are compatible with the QOB220SWN circuit breaker?
This breaker is specifically designed for use in Square D NQ and NQOD panelboards. It is not compatible with standard QO load centers, which require plug-on breakers instead of this bolt-on design.
What wire sizes and materials are accepted by the terminals on this breaker?
The pressure plate terminals accommodate 14 to 8 AWG wire. They are rated for use with both aluminum and copper conductors.
What is the purpose of the switched neutral feature on the QOB220SWN?
The switched neutral design simultaneously disconnects both the ungrounded hot and grounded neutral conductors. This is frequently required by the NEC for specialized commercial applications, such as fuel dispensing pumps, to ensure complete isolation of the circuit.
Why does the QOB220SWN require two poles for a 120VAC circuit?
While standard 120VAC circuits only require a single-pole breaker, this switched neutral model requires two poles. One pole is dedicated to the ungrounded hot conductor, and the second pole switches the grounded neutral conductor to completely isolate the equipment.
How does the bolt-on mounting style benefit commercial installations?
The bolt-on design of the QOB220SWN ensures a secure, vibration-resistant mechanical connection directly to the panelboard busbar. This prevents the breaker from loosening over time in high-demand or industrial environments.
How does the thermal-magnetic trip mechanism operate on this breaker?
The fixed thermal-magnetic mechanism provides dual protection. The thermal element offers long-time protection against sustained overloads, while the magnetic element provides instantaneous tripping in the event of a short circuit.
Does this breaker support DC voltage applications?
Yes, in addition to its 120VAC rating, the QOB220SWN is rated for 48VDC applications with a 5kA interrupting capacity, allowing it to be used in specific low-voltage DC control circuits.
Is the QOB220SWN manufactured by Square D or Schneider Electric?
Square D is a flagship brand owned by Schneider Electric. This breaker is manufactured by Schneider Electric and is commonly branded as Square D in North American markets.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 206 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
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.