Square D QOB330SWN Miniature Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Square D
QOB330SWN
Miniature Circuit Breaker
Brand
Square D
SKU
QOB330SWN
Quantity
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Square D QOB330SWN - 30A 3 Pole Miniature Circuit Breaker
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Description
Designed for applications requiring neutral disconnection, the Square D QOB330SWN is a 3-pole, 30A miniature circuit breaker. It provides reliable thermal-magnetic protection while simultaneously opening the neutral conductor during a trip. This bolt-on breaker is engineered to install into Square D NQ and NQOD panelboards. Delivering a 10 kAIC interrupting rating at 120/240V, it features the exclusive Visi-Trip indicator to easily identify tripped circuits in a busy commercial panel.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB330SWN |
| Series | QOB |
| Amperage | 30A |
| 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 | 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 |
|---|---|
| Accessories | Switch Neutral |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
5 answersWhat panelboards are compatible with the Square D QOB330SWN?
The QOB330SWN is a bolt-on miniature circuit breaker designed specifically for Square D NQ and NQOD series panelboards. Because of its bolt-on mounting style, it cannot be installed in standard QO residential load centers, which require plug-on breakers.
What does the SWN suffix indicate on the QOB330SWN breaker?
The SWN suffix designates a switch neutral feature. This allows the breaker to disconnect the grounded neutral conductor simultaneously with the ungrounded phase conductors. This feature is often required by the National Electrical Code for specific applications, such as gas pump assemblies and fuel dispensing equipment.
Can the QOB330SWN be used in direct current applications?
Yes, the QOB330SWN is rated for direct current applications up to 48VDC, providing a 5kA interrupting capacity. This makes it suitable for specific control circuits and DC power systems that fall within this voltage limit.
Why use a bolt-on breaker like the QOB330SWN instead of a plug-on type?
The QOB330SWN secures directly to the panelboard bus with a screw, creating a highly secure, vibration-resistant connection. This bolt-on design is typically required in commercial and industrial environments where equipment vibration or heavy usage could loosen a standard plug-on connection.
Is the Square D QOB330SWN still in active production by Schneider Electric?
No, Schneider Electric officially discontinued the QOB330SWN in early 2023. It has not been replaced with a direct substitute, making existing inventory the primary source for replacements in legacy NQ and NQOD panels.
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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