Square D FA32040-1021 Molded Case Circuit Breaker
- 40A
- 3 Pole
- I-Line
Square D
FA32040-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA32040-1021
Quantity
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Square D FA32040-1021 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Featuring an integrated 120-240VAC shunt trip mechanism, this 40-amp F-frame breaker enables automated or remote tripping. It is ideal for industrial safety systems requiring emergency power cutoff alongside standard overcurrent defense. This unit installs into Square D I-Line panelboards via standard plug-on jaws. When upgrading, it is replaced by the PowerPacT HDA36040, which requires a separate S29386 shunt trip accessory. The assembly provides 10kA interrupting capacity at 240V.Specifications
| Brand | Square D |
|---|---|
| Series | FA |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 5kA @ 250VDC |
| Frame Type | F |
|---|---|
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (120-240VAC) |
| 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
6 answersWhat panelboards accept the FA32040-1021 circuit breaker?
This F-frame breaker is designed specifically for Square D I-Line panelboards and switchboards. It uses an I-Line style plug-in connection for the line side.
What does the 1021 suffix indicate on this FA series breaker?
The 1021 suffix designates a factory-installed 120/240VAC shunt trip mechanism. This allows the breaker to be opened remotely for emergency shutdowns or automated control systems.
What wire gauge is supported by the load lugs on this breaker?
The factory-installed load lugs accommodate copper or aluminum conductors ranging from 14 AWG up to 1/0 AWG.
Is the FA32040-1021 suitable for direct current circuits?
Yes, this breaker is rated for 250VDC systems and provides a 5kA interrupting capacity for DC applications, in addition to its standard 240VAC rating.
Are the trip settings adjustable on this F-frame breaker?
No, the thermal-magnetic trip unit features fixed thermal and fixed magnetic settings for its long-time and instantaneous protection functions.
Is the FA32040-1021 part of a current or legacy product line?
The FA series is a legacy F-frame molded case circuit breaker. It serves as a direct replacement for existing I-Line installations that require a 40A, 3-pole configuration with a shunt trip.
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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.