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Square D QBA221252 Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Square D
QBA221252
Molded Case Circuit Breaker
Brand
Square D
SKU
QBA221252
Quantity
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Square D QBA221252 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D QBA221252 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QBA221252 |
| Series | QBA |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 208Y/120VAC, 10kA @ 240VAC |
| Frame Type | QBA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, 80% Rated |
Sold out
Quantity
Square D QBA221252 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QBA221252-R |
| Series | QBA |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 208Y/120VAC, 10kA @ 240VAC |
| Frame Type | QBA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, 80% Rated |
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Description
Engineered for commercial and industrial power distribution, the Square D QBA221252 is a 2-pole, 125A molded case circuit breaker from the PowerPacT Q-Frame family. It provides reliable overcurrent protection for 240V systems. This unit mounts into Square D I-Line panelboards and switchboards. It features an AC phase connection and mechanical lugs on the load side. Rated for 10 kAIC at 240VAC, this breaker utilizes fixed thermal-magnetic trip technology (LI) and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QBA221252-R |
| Series | QBA |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 208Y/120VAC, 10kA @ 240VAC |
| Frame Type | QBA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, 80% Rated |
Product FAQs
6 answersCan I install the QBA221252 in a standard Square D load center?
No. This breaker features an I-Line style plug-in connection and is exclusively designed for Square D I-Line panelboards and switchboards. It is not compatible with QO or Homeline residential load centers.
What is the difference between the QBA221252 and the QDA221252?
The difference is the short-circuit interrupting rating. The QBA221252 has a standard interrupting rating of 10kA at 240VAC, while the QDA221252 offers a higher interrupting capacity of 25kA at 240VAC. Other variants like the QGA and QJA offer even higher ratings.
How much bus space does this 2-pole Q-Frame breaker occupy in an I-Line panel?
PowerPacT Q-Frame I-Line circuit breakers require 1.5 inches of mounting space per pole. As a 2-pole breaker, the QBA221252 will occupy 3 inches of space on the panelboard bus.
Are the load lugs on the QBA221252 rated for both aluminum and copper wire?
Yes, the standard mechanical lugs on this breaker are dual-rated for both aluminum and copper conductors, accepting wire sizes from 4 AWG up to 300 kcmil.
Is the QBA221252 suitable for reverse feeding applications?
No. Because this breaker utilizes an I-Line plug-on jaw for the line-side connection, it is inherently designed for forward feeding directly from the panelboard bus and cannot be reverse fed.
How does the Visi-Trip indicator function on this Q-Frame breaker?
The Visi-Trip feature provides a clear visual alert when the breaker has tripped. The operating handle moves to a center position and a red indicator flag appears, allowing electricians to quickly identify a faulted circuit in a crowded I-Line panelboard.
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Reviews
Review summary
Customers rate this product 4.6 out of 5 based on 12 reviews.
Total 5 star reviews: 10 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
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Rating
12 reviews
- DMDonaldo M. A.Verified BuyerReviewingSquare D QBA32125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/7/26Fast, Easy and Great Item
I bought this item for the first time and it was great! through the website it was easy to find my exact item and also the payment was easy to submit, deliver was on point.
Great company and products.
- KPKevin P.Verified BuyerReviewingSquare D QBA32200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/5/26Sq D I line breaks
Great price and is exactly what was discribed
- DDDavid D.Verified BuyerReviewingSquare D QBA32110 - 110A 3 Pole Molded Case Circuit BreakerI do not recommend this productRated 1 out of 5 stars1/20/26Breaker
Need to return this item.
- DMDave M.Verified BuyerReviewingSquare D QBA32150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/12/25Excellent All Around
Speedy shipping and great staff to work with.
- DBDoug B.ReviewingSquare D QBA32200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/28/23Great service, great item!
Great service, great item!