Square D QOU250-1021 QOU2501021 - 50A 2 Pole Miniature Circuit Breaker
- 50A
- 2 Pole
- Unit Mount
Quantity
Square D QOU2501021 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial applications, this unit-mount miniature breaker provides reliable overcurrent protection alongside remote tripping capabilities. It installs into OEM enclosures, control panels, and DIN rail systems using standard mounting hardware. The factory-installed 120/208/240VAC shunt trip allows for automated circuit interruption, while the reversible box lugs accommodate versatile wiring configurations.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU250-1021 |
| 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 |
| Max Wire | 2 AWG |
| Min Wire | 14 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 | Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489, HACR Rated |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhat does the -1021 suffix mean on the QOU250-1021 breaker?
The -1021 suffix indicates that this breaker includes a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely using a 120V, 208V, or 240V AC control signal.
Can I add a shunt trip to a standard QOU250 breaker in the field?
No, shunt trips for Square D QOU breakers must be factory-installed. If your application requires remote tripping capabilities, you must order a breaker with the appropriate suffix, such as this QOU250-1021 model.
How much physical space does the QOU250-1021 require?
Although it is a 2-pole breaker, the factory-installed shunt trip requires an additional pole space. The total width of the unit is 2.25 inches, which is equivalent to three standard 0.75-inch pole spaces.
What size wire do the terminals on this breaker accept?
The slotted box lugs on both the line and load sides accept 14 AWG to 2 AWG aluminum or copper conductors. The separate shunt trip accessory terminals accept up to two 14 AWG to 12 AWG copper wires.
How is the QOU250-1021 mounted?
As a QOU series unit-mount breaker, it is designed for cable-in and cable-out applications. It can be surface-mounted, flush-mounted, or installed on a standard DIN rail using the appropriate Square D mounting hardware.
Is this breaker compatible with standard QO load centers?
No, QOU series breakers are unit-mount and do not plug or bolt onto a panelboard bus. They are designed for OEM panels, control panels, and standalone enclosures rather than standard QO or QOB load centers.
Does this breaker feature a Visi-Trip indicator?
Yes, Square D QOU breakers include the Visi-Trip indicator. When the breaker trips due to an overcurrent event or a remote shunt trip signal, a highly visible red indicator appears to help you quickly identify the open circuit.
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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!