Free Shipping Over $99
Square D QBA221253 Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Square D
QBA221253
Molded Case Circuit Breaker
Brand
Square D
SKU
QBA221253
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D QBA221253 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Sold out
Quantity
Square D QBA221253 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QBA221253 |
| 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 | Q |
|---|---|
| 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, Undervoltage Release, Alarm Switch, 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, 80% Rated, Visual Trip Indicator |
Sold out
Quantity
Square D QBA221253 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QBA221253-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 | Q |
|---|---|
| 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, Undervoltage Release, Alarm Switch, 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, 80% Rated, Visual Trip Indicator |
Similar Items
125A 2 Pole Molded Case Circuit Breaker
125A 2 Pole Molded Case Circuit Breaker
110A 2 Pole Molded Case Circuit Breaker
Description
Built for robust electrical distribution, the Square D QBA221253 delivers 125A of continuous current handling in a 2-pole configuration. This PowerPacT Q-Frame device is designed for commercial and industrial facilities requiring dependable 240V protection. The breaker installs into Square D I-Line panelboards and features a specific BA phase connection. It offers a 10 kAIC interrupting rating at 240VAC, utilizing fixed thermal and magnetic trip functions alongside a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QBA221253-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 | Q |
|---|---|
| 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, Undervoltage Release, Alarm Switch, 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, 80% Rated, Visual Trip Indicator |
Product FAQs
7 answersWhich panelboards accept the QBA221253 circuit breaker?
This PowerPacT Q-frame breaker is designed specifically for Square D I-Line panelboards and switchboards. It utilizes an I-Line plug-in connection and is not compatible with standard unit-mount enclosures or QO load centers.
What phase connection does the QBA221253 use?
The "3" at the end of the catalog number indicates this 2-pole breaker is factory configured for a BA phase connection on the I-Line bus.
What are the acceptable wire sizes for the QBA221253 lugs?
The standard box lugs on this breaker accept either copper or aluminum conductors ranging from 4 AWG to 300 kcmil.
Is the QBA221253 a suitable replacement for older Q2 series breakers?
Yes, Schneider Electric designed the PowerPacT Q-frame I-Line circuit breakers as direct replacements for legacy Square D Q2 series devices. They fit into the same I-Line panelboard distribution sections.
How does the thermal-magnetic trip unit function on this breaker?
The fixed thermal-magnetic (LI) trip unit uses a bimetal thermal element to protect against sustained overloads and a magnetic element to trip instantaneously during short-circuit faults.
Is the QBA221253 rated for 480V applications?
No, this Q-frame breaker is rated for a maximum of 240VAC, where it provides a 10kA interrupting rating. It cannot be used on 480V or 600V electrical systems.
What if my application requires an interrupting rating higher than 10kAIC?
The QBA series is limited to 10kAIC at 240VAC. If your system requires a higher fault current rating, you will need to upgrade to the QDA (25kAIC), QGA (65kAIC), or QJA (100kAIC) series breakers with the same frame size and phase connection.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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
Search
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!