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Square D QO2110 Miniature Circuit Breaker
- 110A
- 2 Pole
- Plug-On
Square D
QO2110
Miniature Circuit Breaker
Brand
Square D
SKU
QO2110
Quantity
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Square D QO2110 - 110A 2 Pole Miniature Circuit Breaker
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Description
Part of the QO series, the Square D QO2110 is a 110A, two-pole miniature circuit breaker. It provides dependable thermal-magnetic overcurrent protection for residential and commercial applications. This breaker installs into Square D QO load centers, NQ panelboards, and Speed-D switchboards. The plug-on design allows for a clean installation. Rated for 10kAIC at 120/240V, this common-trip breaker features the signature Visi-Trip indicator for quick fault identification.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO2110 |
| Series | QO |
| Amperage | 110A |
| 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, NQOD Panelboards, Speed-D Switchboards |
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Common Trip |
Product FAQs
6 answersCan I install the QO2110 in a Homeline load center?
No. Square D QO and Homeline breakers have different mounting configurations and are not interchangeable. The QO2110 is designed exclusively for QO load centers, NQ or NQOD panelboards, and Speed-D switchboards.
Is there a bolt-on version of the QO2110 available?
Yes. If your panelboard requires a bolt-on connection rather than a plug-on type, the correct equivalent catalog number is QOB2110.
What is the recommended tightening torque for the box lugs on the QO2110?
The manufacturer recommended tightening torque for the load-side box lugs on this breaker is 49.6 lb-in.
Can the QO2110 be used as a back-fed main breaker?
Yes, it can be used as a back-fed main in a compatible QO load center. However, you must install a retaining bracket kit, such as the PK2MB, to secure the breaker to the panel interior in accordance with NEC requirements.
Is the QO2110 HACR rated?
Yes, this breaker is HACR rated, making it suitable for protecting heating, air conditioning, and refrigeration equipment circuits that require this designation.
How many panel spaces does the QO2110 require?
As a 2-pole QO miniature circuit breaker, it requires two standard 3/4-inch spaces in your load center or panelboard.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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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