Square D QOU2501021 Miniature Circuit Breaker
- 50A
- 2 Pole
- Unit Mount
Quantity
Square D QOU2501021 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Built to handle demanding commercial environments, this 50-amp miniature breaker combines standard overcurrent defense with remote tripping features. It attaches into DIN rail assemblies and custom control panels using standard unit-mount hardware. An integrated 120/240VAC shunt trip mechanism enables external control of the circuit, making it ideal for emergency stop or automated shutdown systems requiring reliable reverse-feed capabilities.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 50A |
| Poles | 2 |
| 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 | Padlock Attachment, Mounting Feet, Quick Connectors |
|---|---|
| Accessories | Line and Load Lugs Included, Mounting Hardware, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Reverse Feed |
Product FAQs
6 answersCan I install the QOU2501021 in a standard Square D QO load center?
No. The QOU2501021 is a unit mount circuit breaker designed for OEM panels, control panels, and DIN rail enclosures. It features a cable-in, cable-out design and will not fit into plug-on QO load centers or bolt-on NQ panelboards.
What does the 1021 suffix mean on the QOU2501021 catalog number?
The 1021 suffix indicates that this breaker includes a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely using a 120, 208, or 240VAC control signal, which is commonly used for emergency stop or remote shutdown applications.
How is the QOU2501021 mounted in an enclosure?
This unit mount breaker can be snapped directly onto a standard 35mm DIN rail. It can also be surface mounted or flush mounted using the appropriate mounting feet.
Are the line and load connections on the QOU2501021 reversible?
Yes. This thermal magnetic breaker is line and load reversible, meaning it can be back-fed. It also features reversible lugs to accommodate different wiring angles for flush or surface mounting.
Does the QOU2501021 feature a tripped circuit indicator?
Yes. It 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 to help you quickly identify the faulted circuit.
Is the QOU2501021 suitable for use with heating and air conditioning equipment?
Yes. This 50A breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific UL listing.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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!