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Square D QO1201021 Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Square D
QO1201021
Miniature Circuit Breaker
Brand
Square D
SKU
QO1201021
Quantity
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Square D QO1201021 - 20A 1 Pole Miniature Circuit Breaker
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Description
Engineered for remote tripping, the Square D QO1201021 is a 20A single-pole breaker. It features a factory-installed 120/240VAC shunt trip, ideal for safety systems requiring remote power disconnects. This plug-on unit mounts into Square D QO load centers and NQ panelboards. Due to the attached shunt trip module, it requires two full panel spaces. Rated for 10kAIC at 120/240V, it includes the signature Visi-Trip indicator for quick fault identification and is HACR rated for HVAC use.Specifications
| Brand | Square D |
|---|---|
| Series | QO |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 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 |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489, RoHS, REACh |
| Approval | CSA, HACR, UL |
| Temp Rating | -25C to 70C |
| Construction Features | Visual Trip Indicator, HACR Rated, SWD Rated |
Product FAQs
8 answersWhat panels are compatible with the QO1201021 circuit breaker?
This plug-on breaker is designed for installation in Square D QO load centers and NQ panelboards.
How many panel spaces does the QO1201021 require?
Although it is a 1-pole breaker, it requires two total panel spaces because it includes a factory-installed shunt trip accessory.
What wire sizes are accepted by the terminals on this breaker?
The pressure plate terminals accommodate 14 AWG to 8 AWG aluminum or copper wire.
What is the voltage rating for the factory-installed shunt trip?
The integrated shunt trip accessory is rated for 120/208/240VAC, allowing for remote tripping of the breaker.
What is the DC interrupting capacity for this breaker?
While it provides 10kAIC for AC applications, it is also rated for 5kAIC at 48VDC.
Does this breaker feature a visual trip indicator?
Yes, it includes the Square D Visi-Trip indicator, which provides clear visual confirmation when the circuit has tripped.
What type of trip mechanism does the QO1201021 use?
It utilizes a fixed thermal-magnetic trip unit that provides long-time and instantaneous (LI) overcurrent protection.
Is there a bolt-on version of this breaker available?
Yes, the QOB1201021 is the bolt-on equivalent designed for use in Square D NQ and NQOD panelboards.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
285 reviews
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues