Square D FA340151021 Molded Case Circuit Breaker
- 15A
- 3 Pole
- I-Line
Square D
FA340151021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA340151021
Quantity
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Square D FA340151021 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Built for advanced control, the Square D FA340151021 is a 3-pole, 15A molded case circuit breaker featuring a factory-installed 120-240VAC shunt trip. This allows facility managers to remotely open the breaker for emergency shutdowns or automated control. The F-Frame unit easily installs into Square D I-Line panelboards and switchboards. As a legacy component, it is officially replaced by the HDA36015SA. It delivers 18kAIC at 480VAC and features fixed thermal-magnetic (LI) protection.Specifications
| Brand | Square D |
|---|---|
| Series | FA |
| Amperage | 15A |
| 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 | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (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 | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| 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 |
Product FAQs
6 answersWhat panelboards are compatible with the FA340151021 circuit breaker?
This F-Frame breaker features an I-Line plug-on connection and is designed exclusively for use in Square D I-Line panelboards and switchboards.
What does the 1021 suffix indicate on the FA340151021?
The 1021 suffix indicates that this breaker includes a factory-installed 120-240VAC shunt trip mechanism. This allows facility managers or automated systems to remotely open the breaker for emergency shutdowns or control purposes.
What is the modern replacement for the legacy FA340151021 breaker?
As a legacy component, the FA340151021 is officially replaced by the PowerPact H-Frame HDA36015SA, or the standard HDA36015 combined with an S29386 shunt trip accessory.
What wire sizes are accepted by the lugs on the FA340151021?
The standard lugs on this 15A breaker accept 14 AWG to 4 AWG copper wire, or 12 AWG to 4 AWG aluminum wire.
Can the FA340151021 be used in DC power systems?
Yes, in addition to its standard AC ratings, this thermal magnetic breaker is rated for up to 250VDC with a 10kA interrupting capacity.
Are the trip settings adjustable on the FA340151021?
No, this breaker features fixed thermal and fixed magnetic trip elements, providing standard long-time and instantaneous protection without field adjustability.
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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.