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Square D FA340701021 Molded Case Circuit Breaker
- 70A
- 3 Pole
- I-Line
Square D
FA340701021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA340701021
Quantity
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Square D FA340701021 - 70A 3 Pole Molded Case Circuit Breaker
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Description
A reliable solution for remote tripping applications, the Square D FA340701021 is a 3-pole, 70A molded case circuit breaker. It features a factory-installed 120VAC shunt trip mechanism, making it ideal for emergency shutdowns or automated control systems in industrial environments. This F-Frame breaker mounts into Square D I-Line panelboards using a secure plug-on connection. It delivers an 18 kAIC interrupt rating at 480VAC and includes the signature Visi-Trip indicator for quick status checks.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA340701021 |
| Series | FA |
| Amperage | 70A |
| 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 |
| Frame Type | FA |
|---|---|
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| 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
8 answersWhat panelboards are compatible with the FA340701021 circuit breaker?
This F-Frame breaker is designed for use in Square D I-Line panelboards and switchboards. It utilizes a plug-on connection to attach directly to the panel busbar.
What does the 1021 suffix indicate in the FA340701021 part number?
The 1021 suffix signifies that the breaker includes a factory-installed 120VAC shunt trip mechanism. This accessory allows the breaker to be tripped remotely, which is commonly used for emergency shutdowns or automated control systems.
What wire sizes are accepted by the terminals on this breaker?
The load-side lugs on this breaker accept 14 AWG to 1/0 AWG copper or aluminum (Cu/Al) conductors.
Can the FA340701021 be applied in DC voltage systems?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for use in 250VDC systems with an interrupting capacity of 10kA.
How is the FA340701021 installed into an electrical panel?
It features an I-Line style plug-in connection. The line side plugs directly into the I-Line panelboard bus, while the load side uses standard lug terminations for the outgoing circuit.
What type of protection does the LI trip function provide?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (thermal) protection against sustained overloads and Instantaneous (magnetic) protection against short circuits. Both the thermal and magnetic trip points are fixed.
Does this breaker provide a visual indication when it trips?
Yes, it includes a visual trip indicator that allows operators to quickly identify a tripped breaker in the panel during maintenance or troubleshooting.
Is the FA340701021 a current production breaker?
The FA series is classified as a legacy molded case circuit breaker family by Square D. While it is an older F-Frame design, it remains fully compatible with existing I-Line panelboards.
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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.