Square D FAL34020-1021 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Unit Mount
Quantity
Square D FAL34020-1021 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
The Square D FAL34020-1021 is a 3-pole, 20A molded case circuit breaker for commercial power distribution. As part of the legacy F-Frame series, it provides reliable thermal-magnetic protection. This unit mount MCCB installs into Square D enclosures and switchboards. For modern upgrades, this configuration is superseded by the HDL36020 breaker. Rated 25kAIC at 240VAC, it features long-time and instantaneous trip functions, plus a factory-installed 120/240VAC shunt trip for remote interruption.Specifications
| Brand | Square D |
|---|---|
| Part Number | FAL34020-1021 |
| Series | FAL |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | FAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Enclosures, Switchboards, Panelboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG (Cu) / 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB 1, HACR Rated |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the FAL34020-1021?
The -1021 suffix designates that this breaker is equipped with a factory-installed 120/240VAC shunt trip. This accessory allows the breaker to be tripped remotely via a control signal.
What wire sizes are accepted by the terminals on this breaker?
The included lugs accommodate 14 AWG to 4 AWG copper conductors, or 12 AWG to 4 AWG aluminum conductors.
Can the FAL34020-1021 be used in direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is rated for use in 250VDC applications with a 10kA interrupting capacity.
How is the FAL34020-1021 mounted?
This is a unit-mount (feed-thru) circuit breaker. It is designed to be bolted directly to the backpan of compatible Square D enclosures, switchboards, or panelboards, rather than plugging onto a busbar or using an I-Line connection.
Is the Square D FAL series still the current standard for new installations?
The FAL series is a legacy F-frame molded case circuit breaker primarily used to maintain and support existing systems. New Square D installations typically utilize the modern PowerPact series.
What type of protection does the thermal-magnetic trip unit provide?
The fixed thermal-magnetic (LI) trip unit provides long-time protection against sustained overloads and instantaneous protection against severe short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 39 reviews.
- PCPierre C.Verified BuyerReviewingSquare D FAL3603015M - 30A 3 Pole Motor Circuit ProtectorI recommend this productRated 5 out of 5 stars9/15/26Great service!!!
Bought this to replace the faulty one. Shipped overnight and arrived at noon as promised. Works as new. Very happy with this. Awesome help from the staff. Definitely my go to place now.
Thank you.
- MBMichael B.Verified BuyerReviewingSquare D FAL32030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/13/26Great product
This item worked as expected and is good quality. SuperBreakers did a great job with communication and delivery.
- ZBZachary B.Verified BuyerReviewingSquare D FAL36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/23/26Perfect
Exactly what we needed and worked flawlessly. Thanks
- JRJohn R.Verified BuyerReviewingSquare D FAL36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/29/26Circuit Breaker
The breaker was in "like new" condition and well packed for shipping. Excellent value overall!
- RFRon F.Verified BuyerReviewingSquare D FAL340801021 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/13/26Square D FAL340801021 - 80A 3 Pole Molded Case Circuit Breaker
As usual SB has the best price and delivery was spot on!