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Square D FA26045AC Molded Case Circuit Breaker
- 45A
- 2 Pole
- I-Line
Square D
FA26045AC
Molded Case Circuit Breaker
Brand
Square D
SKU
FA26045AC
Quantity
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Square D FA26045AC - 45A 2 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-Frame series, this 45A thermal-magnetic device delivers robust overcurrent protection for demanding commercial environments. It utilizes an AC phase jaw configuration to help distribute loads evenly across the busbar. The unit snaps securely into Square D I-Line distribution panels and switchgear. When modernizing older infrastructure, facility managers can substitute this exact model with the PowerPact HDA260452.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA26045AC |
| Series | FA |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Phase A-C Connection (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489, Federal Specification W-C-375B/GEN |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat does the AC suffix mean in the FA26045AC catalog number?
The AC suffix indicates the breaker is factory-configured for an A-C phase connection. This 2-pole breaker will draw power from the A and C phases when installed on the I-Line busbar.
Can I install the FA26045AC in a standard Square D QO or NQ panel?
No, the FA26045AC is an I-Line plug-on breaker. It is only compatible with Square D I-Line panelboards and switchboards, which use a specialized busbar system.
What is the modern replacement for the legacy FA26045AC breaker?
The FA frame is a legacy series. When modernizing older infrastructure, facility managers typically substitute this exact model with a 2-pole Square D PowerPact H-Frame circuit breaker configured for I-Line panels.
Are the trip settings on the FA26045AC adjustable?
No, this breaker features a thermal-magnetic trip unit with fixed long-time and fixed instantaneous trip functions. The trip settings are factory-calibrated and cannot be modified in the field.
How does the FA26045AC secure to the panelboard?
The line side of the breaker features factory-set plug-in jaws that snap directly onto the I-Line busbar. The load side is then secured to the panel backpan using a mounting screw to ensure a stable connection.
How can I safely test the mechanical operation of the FA26045AC?
You can use the push-to-trip button located on the faceplate of the breaker. This allows you to manually trip the mechanism and verify it is functioning correctly without exposing yourself to live electrical parts.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 70 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
70 reviews
- 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.
- EBEdward B.Verified BuyerReviewingSquare D FA32100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26As good as new
The Square D FA32100 circuit breaker (refurbished) was as good as a new breaker, without exception. There was no wear and tear or any marks at all. It was basically new. It is an excellent choice and a great product without having to pay the cost of a new breaker.