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Square D FA22040AB Molded Case Circuit Breaker
- 40A
- 2 Pole
- I-Line
Square D
FA22040AB
Molded Case Circuit Breaker
Brand
Square D
SKU
FA22040AB
Quantity
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Square D FA22040AB - 40A 2 Pole Molded Case Circuit Breaker
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Square D FA22040AB - 40A 2 Pole Molded Case Circuit Breaker
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| Brand | Square D |
|---|---|
| Part Number | FA22040AB |
| Series | FA |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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, Undervoltage Release |
|---|---|
| Accessories | Phase AB Jaws |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Phase AB Connection |
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Square D FA22040AB - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA22040AB-R |
| Series | FA |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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, Undervoltage Release |
|---|---|
| Accessories | Phase AB Jaws |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Phase AB Connection |
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Description
Built for commercial and industrial power distribution, the Square D FA22040AB delivers reliable thermal-magnetic protection. This 2-pole, 40A molded case circuit breaker features long-time and instantaneous trip functions for robust circuit safety. This F-Frame breaker installs into Square D I-Line panelboards and switchboards. It serves as a legacy component that is now replaced by the BDA260401. Rated for 10kAIC at 240VAC, this unit features a specific phase AB connection.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA22040AB-R |
| Series | FA |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| 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, Undervoltage Release |
|---|---|
| Accessories | Phase AB Jaws |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Phase AB Connection |
Product FAQs
8 answersIs the Square D FA22040AB still manufactured, or is there a direct replacement?
The FA22040AB is a legacy F-frame circuit breaker and is largely obsolete. The modern replacement is the Square D PowerPact B-frame BDA260401, which fits the same I-Line panelboards and maintains the AB phase connection.
What does the "AB" suffix mean on the FA22040AB catalog number?
The "AB" suffix indicates the specific phase connection for the I-Line bus. This breaker is factory-configured to connect to the A and B phases in a Square D I-Line panelboard or switchboard.
Can I change the phase connection on this breaker in the field?
No. Square D I-Line breakers with specific phase suffixes, like the FA22040AB, have factory-installed blow-on jaw connectors configured for those exact phases. You cannot reconfigure an AB breaker to an AC or BC phase connection in the field.
What is the difference between the FA and FH series for this 40A breaker?
The FA series, like the FA22040AB, provides standard interrupting capacity (10kA at 240V). The FH series offers a high interrupting capacity (up to 65kA at 240V) for systems with higher available fault currents.
How does the I-Line mounting system work on the FA22040AB?
The breaker features plug-on jaw connectors on the line side that grip the I-Line bus bars. This blow-on design tightens its grip during high-fault short circuits, reducing the risk of arcing and providing a secure, tool-free bus connection.
Are the thermal-magnetic trip settings adjustable on the FA22040AB?
No. This F-frame breaker features fixed thermal and fixed magnetic trip elements. The long-time and instantaneous trip functions are factory-calibrated and cannot be adjusted in the field.
Can I install the FA22040AB in a standard QO or Homeline load center?
No. This breaker is exclusively designed for commercial and industrial Square D I-Line panelboards and switchboards. It will not fit in residential QO or Homeline enclosures.
Does the FA22040AB include a push-to-trip button for testing?
Yes. Square D FA-frame molded case circuit breakers feature a built-in push-to-trip mechanism. This allows you to manually trip the breaker to verify the mechanical operation of the trip unit and linkage without exposing personnel to live parts.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 71 reviews.
Reviews Summary
Generated by AI from 68 most recent customer reviews
Last updated 8/15/26
Customers say this circuit breaker matches its description, fits perfectly, and works as expected. Many reviews highlight fast shipping and quick delivery times, with several noting orders arrived within days. Users appreciate the product condition, describing refurbished units as appearing new without wear or marks. Common feedback addresses competitive pricing compared to local suppliers and the overall value proposition. Customers report straightforward ordering processes and reliable service, with repeat purchasers noting consistent positive experiences. The breaker installed easily and functioned properly in various applications.
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Rating
71 reviews
- RLRichard L.Verified BuyerReviewingSquare D FA34090 - 90A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/30/26Mill Superintendant
Works great!
We will definitely use SuperBreakers again.
Thank you!
Richard
- CPCasey P.Verified BuyerReviewingSquare D FA34030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Great company
Ordered on a Saturday evening, paid for two day shipping and it arrived on time and in perfect condition. Would 100 percent be using this company going forward, beat out pricing and shipping times for all my local supply houses. Plus the staff were great to deal with.
- AHAnn H.Verified BuyerReviewingSquare D FA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/22/26Professional Service
So far, so good! The circuit breaker was installed along with a new compressor for our church AC, and everything is now working well.
The company has been professional, dependable, and reputable throughout the process. I had a question after the installation, and it was answered immediately. I also appreciated that they followed up and asked for feedback to make sure the new part was working properly and that we were satisfied with the service.
It’s refreshing to deal with a company that not only has quality products but also cares about its customers after the job is completed. I would definitely recommend them!
- RErene e.Verified BuyerReviewingSquare D FA34070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/14/26breaker
breaker was just as discribed
- BEBallentine E.Verified BuyerReviewingSquare D FA24060AC - 60A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/15/26Great
Accurate and on time.