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Square D QBA221504 Molded Case Circuit Breaker
- 150A
- 2 Pole
- I-Line
Square D
QBA221504
Molded Case Circuit Breaker
Brand
Square D
SKU
QBA221504
Quantity
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Square D QBA221504 - 150A 2 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty power distribution, the Square D QBA221504 is a 150A, 2-pole molded case circuit breaker. As part of the PowerPacT Q-Frame lineup, it utilizes a thermal-magnetic trip mechanism for LI protection and features a BC phase connection. This unit mounts into standard Square D I-Line panelboards, providing an exact replacement path for older Q22150 breakers. With a 10kAIC interrupt rating at 240VAC, it handles standard commercial faults and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QBA221504 |
| Series | QBA |
| Amperage | 150A |
| 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 |
| 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, Padlock Attachment |
|---|---|
| Accessories | Phase Connection BC |
| Standards | CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersCan I use the QBA221504 to replace an older Q22150 breaker?
Yes, the QBA221504 is the direct modern replacement for legacy Square D Q22150 circuit breakers. It fits into the same I-Line panelboards, ensuring backward compatibility for existing electrical infrastructure.
Will this breaker fit in a standard QO or Homeline load center?
No, the QBA221504 features an I-Line style plug-in connection and is exclusively compatible with Square D I-Line panelboards and switchboards. It will not fit in standard residential QO or Homeline enclosures.
What type of wire can I use with the load lugs on the QBA221504?
The mechanical load lugs on this breaker accept either copper or aluminum conductors ranging from 4 AWG to 300 kcmil.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides both Long-Time (thermal) protection against sustained overloads and Instantaneous (magnetic) protection against short circuits. Both trip settings are fixed on this model.
How is the QBA221504 mounted inside the panel?
It utilizes an I-Line bracket mounting system. The line side plugs directly into the panelboard bus stack, while the load side requires standard wire termination at the mechanical lugs.
Can this breaker be used for HVAC equipment?
Yes, the QBA221504 is HACR rated, meaning it is certified for safe use with heating, air conditioning, and refrigeration systems that require specialized overcurrent protection.
What frame size is the QBA221504?
This breaker is part of the Schneider Electric PowerPacT Q-Frame family. It shares the same footprint and accessory compatibility as other Q-Frame breakers designed for I-Line panelboards.
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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!