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Square D QO230-1021 QO2301021 - 30A 2 Pole Miniature Circuit Breaker
- 30A
- 2 Pole
- Plug-On
Square D
QO230-1021
QO2301021 - 30A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO230-1021
Quantity
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Square D QO2301021 - 30A 2 Pole Miniature Circuit Breaker
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Description
Built for remote shutdown applications, this 30A, 2-pole device includes a 120/240VAC shunt trip. This allows external signals to open the circuit for safety systems. The accessory means this unit requires three standard spaces (2.25 inches wide). It snaps into Square D QO load centers and NQ panelboards, accepting 14-8 AWG wiring. It delivers 10kAIC protection and features the Visi-Trip indicator for quick fault identification.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO2301021 |
| Series | QO |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Terminal Type | Pressure Plate |
|---|---|
| For Use With | QO Load Centers, NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Cu/Al) |
| 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 | Shunt Trip |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Common Trip |
Product FAQs
6 answersWhat does the -1021 suffix mean on the QO230-1021 breaker?
The -1021 suffix indicates the inclusion of a factory-installed 120/240V AC shunt trip accessory. This allows the breaker to be tripped remotely by an external voltage signal, making it ideal for emergency shutdown applications.
How many panel spaces does the QO230-1021 require?
While it is a 2-pole breaker, the factory-installed shunt trip accessory requires an additional pole space. It takes up three standard 3/4-inch spaces (2.25 inches total width) in a compatible panel.
Which electrical panels accept the QO230-1021 breaker?
This plug-on breaker is compatible with Square D QO load centers, NQ panelboards, and legacy NQOD panelboards. It cannot be used in Homeline load centers or panels requiring bolt-on connections.
What is the difference between the QO230-1021 and QOB230-1021?
The QO230-1021 features a plug-on mounting design for QO load centers and compatible panelboards. The QOB230-1021 is the bolt-on equivalent, designed specifically for NQ and NQOD panelboards that require bolt-on breakers.
Does this breaker include a tripped circuit indicator?
Yes, it features the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent event or a remote shunt trip signal, a red indicator appears in the window for quick visual identification in the panel.
Can the shunt trip mechanism be manually overridden?
No, this breaker utilizes a trip-free toggle mechanism. It will automatically trip during a fault condition or when the shunt trip is activated, and the handle cannot be manually held in the ON position to override the trip.
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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