Square D QO1201200 Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Square D
QO1201200
Miniature Circuit Breaker
Brand
Square D
SKU
QO1201200
Quantity
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Square D QO1201200 - 20A 1 Pole Miniature Circuit Breaker
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Description
Engineered for residential and commercial use, the Square D QO1201200 is a 20A, single-pole miniature circuit breaker. It delivers dependable thermal-magnetic protection for 120/240VAC electrical systems. This plug-on breaker mounts easily into Square D QO load centers and NQ panelboards. The pressure plate terminals accept 14-8 AWG copper or aluminum wire. A factory-installed auxiliary switch provides remote indication of breaker status. It also features the exclusive Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | QO |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC |
| 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 | Auxiliary Switch |
| Standards | CSA C22.2 No. 5, UL 489, HACR, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, SWD Rated |
Product FAQs
6 answersWhat panels are compatible with the QO1201200 circuit breaker?
This plug-on circuit breaker is designed for use in Square D QO load centers, NQ panelboards, NQOD panelboards, and Speed-D switchboard distribution panels. It is not compatible with Homeline load centers.
What does the 1200 suffix indicate on the QO1201200 breaker?
The 1200 suffix indicates that this breaker includes a factory-installed auxiliary switch with one normally open (1NO) contact, rated for 5A at 120VAC. This is used for remote signaling or alarm indication when the breaker changes state.
Does the auxiliary switch on the QO1201200 require extra panel space?
Yes, factory-installed electrical accessories like the auxiliary switch take up one additional pole space in the load center or panelboard. Therefore, this 1-pole breaker will require two spaces to install.
What wire sizes are accepted by the terminals on the QO1201200?
The pressure plate terminals accept 14 AWG to 8 AWG aluminum or copper wire. They can also accept two 14 AWG to 10 AWG copper wires.
Is the QO1201200 a direct replacement for standard QO120 breakers?
The QO1201200 functions as a standard 20A 1-pole breaker but includes a 1NO auxiliary switch. If you do not need the auxiliary switch for signaling, a standard QO120 can be used and will only require one panel space instead of two.
Does the QO1201200 feature a Visi-Trip indicator?
Yes, it includes the standard Square D Visi-Trip indicator. When the breaker trips due to an overload or short circuit, the handle snaps to a midpoint position and a highly visible red indicator appears to help quickly identify the tripped circuit.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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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