Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Square D QOB2110 Miniature Circuit Breaker
- 110A
- 2 Pole
- Bolt-On
Square D
QOB2110
Miniature Circuit Breaker
Brand
Square D
SKU
QOB2110
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D QOB2110 - 110A 2 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
100A 2 Pole Miniature Circuit Breaker
100A 2 Pole Miniature Circuit Breaker
QOB21001021 - 100A 2 Pole Miniature Circuit Breaker
Description
Designed to handle specialized 110A commercial loads, this two-pole thermal-magnetic device provides reliable overcurrent protection. The unit fastens into Square D NQ and NQOD panelboards via a robust bolt-on mounting system, ensuring a tight connection in high-vibration environments. Rated for standard 10kAIC fault levels at 120/240VAC, it incorporates the Visi-Trip red indicator flag to help facility managers quickly spot tripped circuits.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB2110 |
| Series | QOB |
| Amperage | 110A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 4 AWG - 2/0 AWG (Cu/Al) |
| 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 answersWhich panelboards accept the QOB2110 circuit breaker?
This bolt-on breaker is designed specifically for Square D NQ and NQOD panelboards. It cannot be installed in standard QO load centers, which require plug-on connections.
What is the plug-on equivalent to the QOB2110?
The direct plug-on equivalent is the Square D QO2110. It features the same 110A rating and trip characteristics but is built for QO load centers instead of bolt-on panelboards.
How many panel spaces does the QOB2110 occupy?
This 2-pole breaker requires two standard 3/4-inch spaces in a compatible NQ or NQOD panelboard, taking up a total width of 1.5 inches.
What are the wire size and torque requirements for the QOB2110 terminals?
The box lugs accept 4 AWG to 2/0 AWG copper or aluminum wire. The required tightening torque for these terminals is 49.6 lb-in (5.6 N.m).
Is the QOB2110 suitable for HVAC equipment?
Yes, this breaker is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires HACR-type overcurrent protection.
Can the QOB2110 be used in direct current (DC) applications?
Yes, this thermal-magnetic breaker is rated for use in DC systems up to 48VDC, providing a 5kA interrupting capacity for those specific applications.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 205 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 3/11/26
Customers say these electrical breakers arrive exactly as ordered and work perfectly for their intended applications. They consistently praise the competitive pricing, which many report is significantly lower than local suppliers. Fast shipping and prompt delivery are frequently highlighted, with many receiving orders within days or even next-day delivery for urgent needs. The breakers arrive well-packaged and in excellent condition. Many reviews emphasize the company's extensive inventory availability, particularly for hard-to-find breakers. One customer experienced difficulty with order cancellation and was charged a restocking fee, which caused dissatisfaction.
Search
Rating
205 reviews
- BLBOOSTIX L.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/17/26QOB220
That's nice breakers!
- PHPaul H.Verified BuyerReviewingSquare D QOB330 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26Quick shipping and delivery
Shipped and delivered on time for installation at one of our projects. Thank you!
- RMRick M.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Project Mgr
Just what I needed.
- DHDoug H.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Square D QOB breakers
As always, our order arrived timely, and accurate. You can’t beat their prices that’s why we have used this company for years.
- RKRyan K.Verified BuyerReviewingSquare D QOB230VH - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26Awesome
Worked great