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Schneider Electric FA34040-1021 Molded Case Circuit Breaker
- 40A
- 3 Pole
- I-Line
Schneider Electric
FA34040-1021
Molded Case Circuit Breaker
Brand
Schneider Electric
SKU
FA34040-1021
Quantity
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Schneider Electric FA34040-1021 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Built for advanced control, the FA34040-1021 is a 3-pole, 40A MCCB by Schneider Electric. It features a factory-installed 120-240VAC shunt trip, allowing users to remotely open the circuit for safety or automation. This F-frame device installs into I-Line panelboards and switchboards. It replaces legacy units and is superseded by the BDA34040Y (requires separate LV426843 shunt trip). Rated at 18 kAIC at 480VAC, it provides robust thermal-magnetic protection and includes load-side lugs.Specifications
| Brand | Schneider Electric |
|---|---|
| Part Number | FA34040-1021 |
| Series | FA |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | FA |
|---|---|
| Terminal Type | Lugs |
| For Use With | I-Line Panelboards, Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the FA34040-1021 circuit breaker?
The -1021 suffix designates that this breaker includes a factory-installed 120-240VAC shunt trip. This accessory allows the breaker to be tripped remotely for safety interlocks or automation purposes.
What is the modern replacement for the legacy FA34040-1021?
The legacy F-frame series is superseded by the PowerPact B-frame series. The direct I-Line replacement is the BDA34040Y. Because the modern B-frame does not use the -1021 suffix, you must add a separate field-installable shunt trip accessory, such as the LV426843, to match the original functionality.
What type of panels accept the FA34040-1021 breaker?
This breaker features an I-Line style plug-in connection on the line side. It is designed exclusively for installation in Square D and Schneider Electric I-Line panelboards and switchboards. It will not fit standard load centers or bolt-on panelboards.
What wire sizes are accepted by the load side lugs on the FA34040-1021?
The standard lugs accept 14 AWG to 1/0 AWG copper wire, or 12 AWG to 1/0 AWG aluminum wire.
Can the FA34040-1021 be used in DC power systems?
Yes, this thermal-magnetic breaker is rated for use on DC systems up to 250VDC. When applied in DC environments, it provides a maximum interrupting capacity of 10kA.
Are the trip settings adjustable on the FA34040-1021?
No, this breaker features a fixed thermal and fixed 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.
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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.