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Square D QOU110 Miniature Circuit Breaker
- 10A
- 1 Pole
- Unit Mount
Square D
QOU110
Miniature Circuit Breaker
Brand
Square D
SKU
QOU110
Quantity
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Square D QOU110 - 10A 1 Pole Miniature Circuit Breaker
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Quantity
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Description
Part of the QO family, this 1-pole 10A miniature circuit breaker is engineered for OEM panels, control systems, and custom enclosures. It utilizes a unit mount design that easily adapts to DIN rail or surface mounting configurations. Rated at 10kAIC at 120/240VAC, it delivers dependable thermal-magnetic protection for residential, commercial, and industrial applications. The built-in Visi-Trip indicator provides immediate visual confirmation of a tripped circuit, minimizing downtime.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU110 |
| Series | QOU |
| Amperage | 10A |
| Poles | 1 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Control Panels, Enclosures |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CE, CSA, HACR, IEC, UL |
| Temp Rating | 40C |
Product FAQs
7 answersHow is the QOU110 circuit breaker mounted?
It features a unit-mount design, allowing it to be surface-mounted, flush-mounted, or installed on a standard DIN rail within OEM panels and custom enclosures.
What is the tightening torque for the lugs on the QOU110?
The slotted box lugs must be torqued to 45 lb-in (5.08 N.m) for 14 to 2 AWG copper or aluminum conductors.
Are the line and load connections on the QOU110 reversible?
Yes, the breaker is equipped with slotted box lugs that are field-reversible, allowing for flexible line and load side wiring configurations in control panels.
Is the QOU110 breaker HACR rated?
Yes, this breaker is HACR rated, making it suitable and approved for protecting heating, air conditioning, and refrigeration equipment circuits.
What is the difference between Square D QO and QOU circuit breakers?
Standard QO breakers feature a plug-on design for direct installation into QO load centers. In contrast, QOU breakers are unit-mounted devices intended for surface, flush, or DIN rail mounting in OEM equipment and custom control panels.
How do I know if the QOU110 has tripped?
The breaker includes a built-in Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, the handle snaps to a center position and a bright red flag appears in the indicator window for quick visual identification.
Can this breaker be used in DC control circuits?
Yes, in addition to standard AC applications, the QOU110 is listed for use in DC electrical systems up to 48VDC, making it suitable for low-voltage control panels.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 106 reviews.
Reviews Summary
Generated by AI from 99 most recent customer reviews
Last updated 5/14/26
Customers say these circuit breakers function properly and arrive quickly. Many reviews highlight fast shipping, competitive pricing, and reliable product condition upon arrival. Users appreciate the wide selection, including hard-to-find models, and note the breakers work as expected for various applications. Common feedback addresses quick order processing and easy website navigation. Most customers report satisfaction with value and delivery speed, with many indicating they will purchase again.
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Rating
106 reviews
- HLHOMETIGO L.Verified BuyerReviewingSquare D QOU260 - 60A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/7/26Good thing
i recommend this for you
- RGRobert G.Verified BuyerReviewingSquare D QOU340 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/3/26Circuit breakers
I appreciate the fact that you had these in stock. my Square D distributor does not seem to stock these anymore and it takes a couple weeks to get. your pricing is inline with theirs.
- THTiffany H.Verified BuyerReviewingSquare D QOU115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/28/26Will use Super Breakers again
Arrived in a timely manner. Exactly what we needed for a job.
- CSCary S.Verified BuyerReviewingSquare D QOU250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Just what I ordered
Just what I needed for dock pedestal
- MHMark H.Verified BuyerReviewingSquare D QOU250VH - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D QOU250VH - 50A 2 Pole Miniature Circuit Breaker
Was just what I expected!