Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Square D QOU1100 Miniature Circuit Breaker
- 100A
- 1 Pole
- Unit Mount
Square D
QOU1100
Miniature Circuit Breaker
Brand
Square D
SKU
QOU1100
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D QOU1100 - 100A 1 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
40A 1 Pole Miniature Circuit Breaker
35A 1 Pole Miniature Circuit Breaker
30A 1 Pole Miniature Circuit Breaker
Description
Rated for 100A, this high-capacity 1-pole miniature circuit breaker provides robust thermal-magnetic protection for demanding commercial and industrial environments. It installs into DIN rail systems, OEM panels, and enclosures using a flexible unit mount configuration. With a 10kAIC rating at 120/240VAC and reversible feed capability, it offers excellent versatility for custom power distribution. The breaker is HACR rated and features a visual trip indicator for easy maintenance.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 100A |
| Poles | 1 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC, 60VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 60VDC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | DIN Rail Systems, OEM Panels, Control Panels, Enclosures |
| Wire Gauge | 12-2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 12 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489, HACR Rated |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Reversible Feed |
Product FAQs
5 answersCan I install the QOU1100 in a standard QO load center?
No. The QOU1100 is a unit-mount circuit breaker designed for surface or DIN rail mounting. It does not plug into standard QO or QOB busbars and is intended for OEM panels, control panels, and enclosures.
How do I mount the QOU1100 to a DIN rail?
The QOU1100 can be mounted to a standard 35mm DIN rail using a compatible Square D DIN rail mounting adapter. It can also be surface-mounted directly to a backpan using its built-in mounting feet.
What is the recommended tightening torque for the box lugs on the QOU1100?
The slotted box lugs on the QOU1100 should be torqued to 45 lb-in for 12 AWG to 2/0 AWG aluminum or copper wire.
Can the QOU1100 be reverse-fed?
Yes. Standard QOU circuit breakers, including the QOU1100, do not have line and load markings and are suitable for reverse feeding or back-feeding applications.
Is the QOU1100 HACR rated?
Yes. The QOU1100 is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires HACR-type circuit breakers.
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 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.
Search
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!