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Square D FA340201021 Molded Case Circuit Breaker
- 20A
- 3 Pole
- I-Line
Square D
FA340201021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA340201021
Quantity
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Square D FA340201021 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial environments, the Square D FA340201021 is a 3-pole thermal-magnetic molded case circuit breaker. It is engineered to mount into Square D I-Line panelboards, offering robust overcurrent protection with long-time and instantaneous (LI) trip functions. This legacy F-Frame unit is replaced by the PowerPact HDA36020 combined with an S29386 shunt trip accessory. It provides an 18 kAIC rating at 480VAC and includes a Visi-Trip indicator for clear status visibility.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA340201021 |
| Series | FA |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip, 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
6 answersWhat panelboards are compatible with the FA340201021 circuit breaker?
This breaker is engineered specifically for installation in Square D I-Line panelboards and I-Line switchboards. It is not compatible with standard QO, NQ, or NF series panels.
What is the current replacement for the legacy FA340201021 breaker?
The legacy F-Frame series has been superseded by the Square D PowerPact H-Frame series. The modern equivalent is the HDA36020 circuit breaker, which must be paired with an S29386 shunt trip accessory to match the original functionality.
What does the 1021 suffix mean on this specific FA series breaker?
The 1021 suffix indicates the inclusion of a factory-installed 120V AC shunt trip accessory. This allows the breaker to be tripped remotely via an external control signal, which is commonly used for emergency shutdowns or automated control systems.
How is the FA340201021 wired and mounted?
This breaker utilizes an I-Line plug-on connection for the line side, which attaches directly to the panelboard bus assembly. The load side features mechanical lugs that accept 14 AWG to 4 AWG copper or aluminum wire.
What type of trip unit is equipped in the FA340201021?
It features a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal component handles sustained overloads, while the magnetic component provides immediate tripping during short-circuit events.
How does the FA340201021 indicate a tripped condition?
When the breaker trips due to an overload or short circuit, the operating handle moves to a center position between ON and OFF. This provides clear visual confirmation that the circuit has been interrupted.
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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.