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Square D FA340501021 Molded Case Circuit Breaker
- 50A
- 3 Pole
- I-Line
Square D
FA340501021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA340501021
Quantity
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Square D FA340501021 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-frame series, this 50-amp thermal-magnetic breaker delivers reliable long-time and instantaneous (LI) protection for commercial distribution systems. It installs into Square D I-Line panelboards and switchboards, utilizing a plug-on phase connection for rapid deployment. Featuring a factory-installed 120VAC shunt trip mechanism, the unit allows for remote tripping capabilities. It provides 18kAIC at 480VAC and is currently replaced by the PowerPact HDA34050SA.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA340501021 |
| Series | FA |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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 (Factory Installed), Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
5 answersWhich panelboards are compatible with the FA340501021 circuit breaker?
This F-frame breaker is specifically designed for Square D I-Line panelboards and switchboards. It features a plug-on phase connection that mounts directly to the I-Line bus assembly.
What does the 1021 suffix indicate on the FA340501021 catalog number?
The 1021 suffix signifies that this breaker includes a factory-installed 120VAC shunt trip mechanism. This allows the breaker to be tripped remotely via an external control circuit, which is often required for emergency shutdown systems.
Is the Square D FA340501021 still in active production?
No, the legacy FA series has been discontinued by Schneider Electric. For new installations, it is typically replaced by the modern PowerPact H-frame series, such as the HDA34050SA, which also includes a shunt trip accessory.
How is the FA340501021 installed in an electrical system?
The line side utilizes an I-Line plug-in connection that snaps directly onto the panelboard bus. The load side is equipped with mechanical lugs that accept 14 AWG to 1/0 AWG copper or aluminum conductors.
What type of trip mechanism does the FA340501021 use?
It utilizes a fixed thermal-magnetic trip unit providing long-time and instantaneous (LI) protection. The thermal element responds to sustained overloads, while the magnetic element provides immediate tripping during short-circuit faults.
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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.