Square D QOU110-1021 QOU1101021 - 10A 1 Pole Miniature Circuit Breaker
- 10A
- 1 Pole
- Unit Mount
Quantity
Square D QOU1101021 - 10A 1 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for advanced control applications, this 1-pole 10A miniature circuit breaker features an integrated shunt trip mechanism for remote disconnect capabilities. It mounts seamlessly into DIN rail systems, OEM panels, and custom enclosures via its versatile unit mount design. Delivering 10kAIC of interrupting capacity at 120/240VAC, it ensures robust thermal-magnetic protection. The HACR-rated breaker also includes a Visi-Trip indicator to quickly identify tripped circuits.Specifications
| Brand | Square D |
|---|---|
| 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, 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 | Shunt Trip |
| 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, Reverse Feed |
Product FAQs
8 answersWhat does the 1021 suffix indicate on the Square D QOU1101021?
The 1021 suffix means this breaker includes a factory-installed 120/240VAC shunt trip. This allows the circuit breaker to be opened remotely via a control signal.
How is the QOU1101021 circuit breaker mounted?
This unit-mount breaker is designed for flexible installation in OEM panels, control systems, and enclosures. It can be surface-mounted, flush-mounted, or installed on standard DIN rail systems.
Can I install the QOU1101021 in a standard Square D QO load center?
No. While it shares the same internal thermal-magnetic trip mechanism as standard QO breakers, the QOU series features a unit-mount design with box lugs on both the line and load sides. It is intended for DIN rail systems, OEM panels, and standalone enclosures, not plug-on load centers.
What is the DC voltage rating for the QOU1101021?
In addition to its 120/240VAC rating, this breaker is rated for 48VDC applications, providing a 5kA interrupting capacity (AIC) on direct current circuits.
What wire sizes are accepted by the terminals on this 10A breaker?
The box lugs on the QOU1101021 accept 14 AWG to 2 AWG aluminum or copper wire.
Does this breaker include a visual trip indicator?
Yes, Square D QOU breakers feature the Visi-Trip indicator. When the breaker trips due to an overload or short circuit, the handle snaps to a midpoint position and a highly visible red indicator appears, making it easy to identify the tripped circuit.
Is the QOU1101021 suitable for reverse-feed applications?
Yes, standard QOU thermal-magnetic breakers without GFCI or AFCI electronics are suitable for reverse feeding, as they feature box lugs on both the line and load sides. Always verify specific application requirements with local electrical codes.
What trip functions are included in the QOU1101021?
This breaker features a fixed thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) trip functions to protect against overloads and short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 107 reviews.
- VBVictor B.Verified BuyerReviewingSquare D QOU280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/6/26Square D QOU280
As advertised, works great under normal load conditions. We Recomend this product. Service and shipping was great and easy. Pleasure to deal with.
- 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