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Square D QO330SWN Miniature Circuit Breaker
- 30A
- 3 Pole
- Plug-On
Square D
QO330SWN
Miniature Circuit Breaker
Brand
Square D
SKU
QO330SWN
Quantity
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Square D QO330SWN - 30A 3 Pole Miniature Circuit Breaker
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Description
Developed for specialized commercial applications, the Square D QO330SWN is a 30A, three-pole miniature circuit breaker with a switched neutral. This design complies with NEC requirements for gas pump assemblies by simultaneously opening all conductors. The unit installs into standard Square D QO load centers and NQ panelboards. Its plug-on mounting style ensures a fast, secure connection.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO330SWN |
| Series | QO |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | QO Load Centers, 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 | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Common Trip |
| Special Features | Switching Neutral |
Product FAQs
5 answersWhat is the purpose of the switched neutral feature on the QO330SWN?
The switched neutral design simultaneously opens all ungrounded conductors and the grounded neutral conductor. This complies with NEC Article 514 requirements for motor fuel dispensing facilities and gas pump assemblies, ensuring complete isolation for maintenance and safety.
Which panels accept the QO330SWN circuit breaker?
This plug-on breaker is designed for use in Square D QO load centers, as well as NQ and NQOD panelboards. It requires three standard one-inch panel spaces for installation.
How is the neutral connection made when installing the QO330SWN?
The branch circuit neutral terminates on the load side of the breaker alongside the ungrounded conductors. The breaker's connection to the panelboard neutral bus is then made using the factory-installed pigtail lead built into the unit.
Does the QO330SWN include ground-fault or arc-fault protection?
No, the QO330SWN is a standard thermal-magnetic circuit breaker with a specialized switched neutral. It does not provide GFCI, AFCI, or EPD (Equipment Protection Device) functionality.
Is the QO330SWN still in active production by Schneider Electric?
Schneider Electric officially discontinued the QO330SWN in June 2023. While no longer manufactured, inventory remains available to service existing gas pump assemblies and specialized commercial panels.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
285 reviews
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues