Square D QOU220-1021 QOU2201021 - 20A 2 Pole Miniature Circuit Breaker
- 20A
- 2 Pole
- Unit Mount
Square D
QOU220-1021
QOU2201021 - 20A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QOU220-1021
Quantity
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Square D QOU2201021 - 20A 2 Pole Miniature Circuit Breaker
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Description
Engineered for advanced control, the Square D QOU220-1021 is a 2-pole, 20A miniature circuit breaker featuring a factory-installed 120/240VAC shunt trip. This allows the breaker to be tripped remotely, making it ideal for emergency stop systems. Designed for unit-mount applications, it installs into OEM panels, enclosures, and DIN rail systems. The breaker includes reversible line and load box lugs to simplify wiring. With a 10 kAIC rating, it provides reliable thermal-magnetic protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU220-1021 |
| Series | QOU |
| Amperage | 20A |
| 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 Thermal, Fixed Magnetic |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| 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
5 answersWhat does the -1021 suffix indicate on the QOU220-1021 breaker?
The -1021 suffix signifies that this breaker comes with a factory-installed 120/240V AC shunt trip. This allows the breaker to be tripped remotely, which is commonly used in emergency stop or automated control systems.
How is the QOU220-1021 breaker mounted in a panel?
As a unit-mount breaker with cable-in/cable-out construction, it does not plug onto a busbar. It can be surface-mounted, flush-mounted using mounting feet, or attached to standard DIN rail systems for OEM and control panel applications.
Does the QOU220-1021 feature a visual trip indicator?
Yes, it includes the standard Square D Visi-Trip indicator. This provides a clear visual flag when the breaker has tripped due to an overcurrent or short circuit condition, making troubleshooting easier in crowded control panels.
Does the QOU220-1021 need to be mounted in a specific orientation?
No, QOU series breakers are designed to operate reliably in any position. This provides maximum flexibility when laying out custom enclosures, OEM equipment, or DIN rail systems.
Does this 2-pole breaker feature common tripping?
Yes, the QOU220-1021 features internal common tripping across both poles. If an overload or short circuit occurs on one pole, both poles will open simultaneously to disconnect the circuit safely.
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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!