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Square D FA340801021 Molded Case Circuit Breaker

  • 80A
  • 3 Pole
  • I-Line
Square D FA340801021
Molded Case Circuit Breaker
Brand Square D
SKU FA340801021
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  • 80A
  • 3 Pole
  • I-Line

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Square D FA340801021 - 80A 3 Pole Molded Case Circuit Breaker

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$1,972.00 Check Stock

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Description SpecificationsProduct FAQs SuperClub Warranties Shipping Reviews 5.0 (71)

Description

Engineered for commercial and industrial power distribution, the Square D FA340801021 is a 3-pole, 80A molded case circuit breaker. It provides reliable thermal-magnetic protection for heavy-duty electrical systems. This legacy F-Frame breaker installs into Square D I-Line panelboards and switchboards. For modern upgrades, it is replaced by the PowerPact HDA36080, which requires a separate shunt trip accessory. Rated for 18 kAIC at 480VAC, it includes a factory-installed 120V shunt trip.

Specifications

Key specifications
Brand Square D
Series FA
Amperage 80A
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
Fit and installation
Frame Type FA
Terminal Type Lugs
For Use With Square D I-Line Panelboards
Wire Gauge 14-1/0 AWG (Cu), 12-1/0 AWG (Al)
Max Wire 1/0 AWG
Min Wire 14 AWG (Cu) / 12 AWG (Al)
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Auxiliary Switch, Undervoltage Release, Alarm Switch
Accessories Shunt Trip 120-240VAC (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

Product FAQs

7 answers
What does the 1021 suffix in the FA340801021 catalog number indicate?

The 1021 suffix indicates that this circuit breaker includes a factory-installed 120/240VAC shunt trip.

What type of panelboards accept the FA340801021 circuit breaker?

This breaker features an I-Line style plug-in mounting connection and is designed specifically for use with Square D I-Line panelboards and switchboards.

Can the FA340801021 be used in DC voltage applications?

Yes, in addition to its AC ratings, this thermal magnetic circuit breaker is rated for use in DC applications up to 250VDC with an interrupting capacity of 10kA.

What wire sizes and materials are compatible with the lugs on this breaker?

The factory lugs accept 14 to 1/0 AWG copper (Cu) wire or 12 to 1/0 AWG aluminum (Al) wire.

Are the trip settings on the FA340801021 adjustable?

No, this breaker features fixed thermal and fixed magnetic trip settings. The long-time and instantaneous trip functions cannot be adjusted in the field.

Is the Square D FA frame still in active production?

The FA frame is a legacy molded case circuit breaker series. While original F-frame breakers are often sourced for direct replacements in existing panels, Schneider Electric has transitioned to the newer PowerPact H-frame series for modern installations.

How does the I-Line mounting system work on this breaker?

The I-Line mounting system uses a plug-on connection that grips the panelboard bus bars. This blow-on jaw design allows for faster installation and creates a secure connection that tightens during short-circuit events.

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Reviews

5.0
Rated 5.0 out of 5 stars
Based on 71 reviews
Reviews Summary
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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71 reviews
  • RL
    Richard L.
    Verified Buyer
    Reviewing
    Square D FA34090 - 90A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/30/26
    Mill Superintendant

    Works great!

    We will definitely use SuperBreakers again.

    Thank you!

    Richard

    Was this helpful?
  • CP
    Casey P.
    Verified Buyer
    Reviewing
    Square D FA34030 - 30A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/14/26
    Great 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.

    Was this helpful?
  • AH
    Ann H.
    Verified Buyer
    Reviewing
    Square D FA36100 - 100A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/22/26
    Professional 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!

    Was this helpful?
  • RE
    rene e.
    Verified Buyer
    Reviewing
    Square D FA34070 - 70A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/14/26
    breaker

    breaker was just as discribed

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  • BE
    Ballentine E.
    Verified Buyer
    Reviewing
    Square D FA24060AC - 60A 2 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/15/26
    Great

    Accurate and on time.

    Was this helpful?