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Square D FA24045AC Molded Case Circuit Breaker
- 45A
- 2 Pole
- I-Line
Square D
FA24045AC
Molded Case Circuit Breaker
Brand
Square D
SKU
FA24045AC
Quantity
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Square D FA24045AC - 45A 2 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-frame family, this 45A breaker provides reliable thermal-magnetic protection. The FA series utilizes a fixed LI trip function to guard against overloads. Designed for Square D I-Line panelboards, the unit features an AC phase connection. It serves industrial power distribution and crosses over to the BDA24045Y2 in newer setups. Rated at 18kAIC at 480VAC, it includes Visi-Trip technology for quick visual identification. The HACR-rated design ensures versatile performance.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA24045AC |
| Series | FA |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards are compatible with the FA24045AC circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a plug-on I-Line connection and cannot be installed in standard QO, NQ, or Homeline load centers.
What does the AC suffix mean in the FA24045AC catalog number?
The AC suffix indicates the specific busbar phase connection. This 2-pole breaker is factory-configured to connect to the A and C phases when plugged into an I-Line panelboard.
Can I install this 2-pole breaker in a 3-phase I-Line panel?
Yes. The FA24045AC can be installed in a 3-phase I-Line panelboard. Because of its AC phase configuration, it will draw power specifically from the A and C phases of the 3-phase bus system.
Does the FA24045AC require a separate mounting hardware kit?
No. As an I-Line style plug-in breaker, it features integrated jaws that clamp directly onto the panelboard bus. This eliminates the need for separate bolt-on mounting hardware or cable connections at the bus side.
Is the Square D FA frame still in active production?
The FA frame is classified as a legacy molded case circuit breaker. While Schneider Electric has transitioned many modern applications to the newer PowerPact series, FA breakers remain widely used and available for direct replacement in existing I-Line infrastructure.
Are the thermal and magnetic trip settings adjustable on the FA24045AC?
No, this breaker features fixed thermal and fixed magnetic trip elements. If your application requires adjustable trip settings for selective coordination, you will need to specify a breaker with an electronic trip unit or an adjustable magnetic frame.
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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.