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Square D QO280-1021 QO2801021 - 80A 2 Pole Miniature Circuit Breaker
- 80A
- 2 Pole
- Plug-On
Square D
QO280-1021
QO2801021 - 80A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO280-1021
Quantity
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Square D QO2801021 - 80A 2 Pole Miniature Circuit Breaker
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Description
Engineered for commercial applications, the Square D QO280-1021 provides 80A overcurrent protection with remote tripping capabilities. This two-pole miniature circuit breaker is designed for 120/240V systems requiring advanced control. It mounts into standard QO load centers and NQ panelboards using a simple plug-on connection. The box lug terminals accept 4 AWG to 2/0 AWG wire. A factory-installed 120/240V AC shunt trip allows the breaker to be opened from a remote location.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO280-1021 |
| Series | QO |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 4 AWG - 2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersWhat does the -1021 suffix mean on the QO280-1021 breaker?
The -1021 suffix indicates that this breaker includes a factory-installed 120/208/240V AC shunt trip accessory. This allows the breaker to be tripped remotely when voltage is applied to the accessory leads.
Which load centers and panelboards are compatible with the QO280-1021?
This plug-on breaker is designed for use in Square D QO load centers, NQ panelboards, and compatible OEM interior or Speed-D switchboard distribution panels.
Can the QO280-1021 be installed in a bolt-on panelboard?
No, the QO280-1021 features a plug-on mounting design. If your panel requires bolt-on connections, you will need the QOB equivalent, part number QOB2801021.
How many panel spaces does the QO280-1021 require?
Because it includes a factory-installed shunt trip accessory, this 2-pole breaker requires three full panel spaces for installation.
Can I add a shunt trip to a standard QO280 breaker in the field?
No, Square D QO series shunt trips are factory-installed components. If your application requires remote tripping capabilities, you must purchase a breaker with the -1021 suffix, such as the QO280-1021.
Is the QO280-1021 suitable for HVAC applications?
Yes, this breaker is HACR (Heating, Air Conditioning, and Refrigeration) rated, making it approved for use with compatible HVAC equipment requiring an 80A circuit.
How does the Visi-Trip indicator improve safety during maintenance?
Square D QO breakers feature a Visi-Trip indicator that displays a highly visible red flag when the breaker has tripped. This allows electricians to quickly identify the faulted circuit in a crowded panel before beginning troubleshooting.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 286 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
286 reviews
- RBRobert B.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Square D Q0120-20A circuit breaker
This device was delivered on time as advertised and it was in excellent condition. The installation process was simple and straightforward, and the unit worked perfectly when connected to the electric circuit.
I am completely satisfied and will utilize this component resource for my future electrical needs.
- 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