Square D QOU115HM Miniature Circuit Breaker
- 15A
- 1 Pole
- Unit Mount
Square D
QOU115HM
Miniature Circuit Breaker
Brand
Square D
SKU
QOU115HM
Quantity
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Square D QOU115HM - 15A 1 Pole Miniature Circuit Breaker
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Description
Built for commercial applications, the Square D QOU115HM delivers protection for circuits with high inrush demands. This 15-amp breaker features a high magnetic trip setting ideal for motor control. The unit-mount frame installs easily into OEM panels and DIN rail systems. It utilizes reversible box lugs that accept 14-2 AWG wiring. Rated at 10 kAIC, it includes a Visi-Trip indicator for quick fault identification. It is HACR and SWD rated for HVAC and lighting use.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 15A |
| 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 | OEM Panels, Control Panels, DIN Rail Systems, 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Mounting Feet |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, High-Magnetic, Visual Trip Indicator, Reverse Feed |
Product FAQs
8 answersWhat does the HM suffix mean in the QOU115HM catalog number?
The HM suffix indicates a High Magnetic trip setting. This allows the breaker to handle higher initial inrush currents without nuisance tripping, making it ideal for specific motor loads, transformers, or individual dimmer applications.
What is the difference between a standard QOU115 and the QOU115HM?
While both are 15A, 1-pole unit-mount breakers, the QOU115HM features a High Magnetic (HM) trip unit. The HM version is specifically calibrated to handle higher transient inrush currents without nuisance tripping, whereas the standard QOU115 has a standard thermal-magnetic trip curve.
How is the Square D QOU115HM circuit breaker mounted?
This QOU breaker is designed for unit mounting. It can be surface-mounted, flush-mounted using optional mounting feet, or installed on a standard 35mm DIN rail (35 x 7.5 DIN/EN 50 022).
Can the QOU115HM be installed in a standard QO load center?
No. QOU breakers are unit-mount, cable-in/cable-out breakers designed for OEM panels, control panels, and DIN rail systems. They do not plug into or bolt onto standard QO or NQ panelboard busbars.
What is the recommended terminal torque for the QOU115HM?
The slotted box lugs on both the line and load sides should be torqued to 45 lb-in (5.08 N.m) when using 14 to 2 AWG aluminum or copper wire.
Can the QOU115HM be reverse fed?
Yes, QOU circuit breakers can be reverse fed. The slotted box lugs are reversible for the line and load sides, allowing for flexible wiring configurations in control panels and OEM enclosures.
Is the QOU115HM rated for switching duty?
Yes, this 15A single-pole QOU breaker is Switching Duty (SWD) rated, meaning it is suitable for switching 120VAC fluorescent lighting loads on and off on a regular basis. It is also HACR rated for use with heating, air conditioning, and refrigeration equipment.
Does the QOU115HM feature a tripped circuit indicator?
Yes, this breaker includes the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, a highly visible red indicator appears in the window, allowing for quick identification of the faulted circuit.
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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!