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Square D FA24020AC Molded Case Circuit Breaker
- 20A
- 2 Pole
- I-Line
Square D
FA24020AC
Molded Case Circuit Breaker
Brand
Square D
SKU
FA24020AC
Quantity
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Square D FA24020AC - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FA24020AC - 20A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA24020AC |
| Series | FA |
| Amperage | 20A |
| 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 | 14-4 AWG (Cu/Al) |
| Max Wire | 4 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 | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Quantity
Square D FA24020AC - 20A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA24020AC-R |
| Series | FA |
| Amperage | 20A |
| 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 | 14-4 AWG (Cu/Al) |
| Max Wire | 4 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 | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
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Description
The FA24020AC is a 2-pole, 20A molded case circuit breaker from Square D's legacy F-frame family. It features an A-C phase connection for specific I-Line busbar configurations. This unit installs into standard Square D I-Line panelboards. While the FA series is a trusted standard, it is officially replaced by the newer PowerPacT B series (BDA260202). Rated for 18kAIC at 480V, it utilizes fixed thermal-magnetic trip technology for reliable long-time and instantaneous (LI) protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA24020AC |
| Series | FA |
| Amperage | 20A |
| 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 | 14-4 AWG (Cu/Al) |
| Max Wire | 4 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 | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersWhat does the "AC" suffix indicate on the FA24020AC catalog number?
The "AC" suffix specifies the phase connection for the I-Line plug-on jaws. It dictates that this 2-pole breaker will connect specifically to the A and C phases on a Square D I-Line panelboard busbar.
Can I install the FA24020AC in a standard Square D NQ or NF panelboard?
No. The FA24020AC features an I-Line style plug-in connection designed exclusively for Square D I-Line distribution panelboards and switchboards. It is not compatible with NQ, NF, QO, or Homeline load centers.
What is the current PowerPacT replacement for the legacy FA24020AC?
The FA series is a legacy F-frame breaker that has been officially replaced by the newer Square D PowerPacT B series. The direct modern equivalent for this specific 20A, A-C phase configuration is catalog number BDA260202.
Do I need additional mounting hardware to install this breaker in an I-Line panel?
No. The FA24020AC comes factory-equipped with the proprietary I-Line plug-on jaws on the line side. It snaps directly onto the I-Line busbar without the need for separate mounting brackets or hardware.
Are the thermal and magnetic trip settings adjustable on the FA24020AC?
No. This breaker utilizes a fixed thermal-magnetic trip unit. Both the long-time overload protection and the instantaneous short-circuit protection are factory-set and cannot be adjusted in the field.
Can the FA24020AC be used in direct current (DC) systems?
Yes. While primarily used in AC systems up to 480VAC, this breaker is also rated for use in DC applications up to 250VDC, where it provides an interrupting capacity of 10kAIC.
What are the acceptable wire sizes for the lugs on this breaker?
The factory-installed lugs on the FA24020AC are rated to accept wire gauges from 14 AWG up to 4 AWG. The terminals are dual-rated for both copper (Cu) and aluminum (Al) conductors.
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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.