Square D QO215-1021 QO2151021 - 15A 2 Pole Miniature Circuit Breaker
- 15A
- 2 Pole
- Plug-On
Square D
QO215-1021
QO2151021 - 15A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO215-1021
Quantity
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Square D QO2151021 - 15A 2 Pole Miniature Circuit Breaker
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Description
Built for commercial and industrial applications, the QO215-1021 is a 2-pole, 15A miniature circuit breaker from Square D. It features a factory-installed 120/240VAC shunt trip accessory, allowing the breaker to be tripped remotely via an external voltage signal. This plug-on breaker installs into standard QO load centers, NQ panelboards, and NQOD panelboards. It accepts 14-8 AWG aluminum or copper wiring via pressure plate terminals and requires two panel spaces for installation.Specifications
| Brand | Square D |
|---|---|
| Series | QO |
| Amperage | 15A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| 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 |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489, HACR, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
5 answersWhich panelboards and load centers are compatible with the QO215-1021?
This breaker installs into Square D QO load centers, NQ panelboards, and legacy NQOD panelboards. It features a plug-on mounting design and cannot be installed in Homeline load centers or bolt-on QOB panels.
What does the -1021 suffix indicate on this QO circuit breaker?
The -1021 suffix signifies that the breaker includes a factory-installed 120/240VAC shunt trip. This allows the breaker to be tripped remotely by applying voltage to the shunt trip coil, which is commonly used for emergency stops or automated control systems.
How many panel spaces does the QO215-1021 require?
Because it includes a factory-installed shunt trip accessory, this 2-pole breaker requires 3 pole spaces in the load center or panelboard.
How does the thermal-magnetic trip mechanism operate in this breaker?
The thermal-magnetic mechanism provides dual protection. A bimetallic strip responds to prolonged overloads (Long-Time trip), while an electromagnetic assembly reacts immediately to short circuits (Instantaneous trip).
What is the difference between the QO215-1021 and the QOB215-1021?
The QO215-1021 features a plug-on mounting design for QO load centers and NQ panelboards. The QOB215-1021 is the bolt-on equivalent designed specifically for NQ and NQOD panelboards that require bolt-on connections.
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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