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Square D FAL34020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Unit Mount
Square D
FAL34020
Molded Case Circuit Breaker
Brand
Square D
SKU
FAL34020
Quantity
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Square D FAL34020 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FAL34020 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FAL34020 |
| 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, Motor Control Centers |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Quantity
Square D FAL34020 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FAL34020-R |
| 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, Motor Control Centers |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
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Description
Built for demanding commercial and industrial environments, the FAL34020 is a 3-pole, 20A molded case circuit breaker from Square D. It utilizes fixed thermal-magnetic trip technology to safeguard critical electrical infrastructure. This unit mount MCCB connects via standard lugs into Square D enclosures, switchboards, and motor control centers. Rated for 18 kAIC at 480VAC, it includes the Visi-Trip indicator for fast troubleshooting. It is replaced by the HDL34020 for modern upgrades.Specifications
| Brand | Square D |
|---|---|
| Part Number | FAL34020 |
| 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, Motor Control Centers |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
6 answersWhat does a Unit Mount configuration mean for the installation of the FAL34020?
Unit mount indicates that this breaker bolts directly to a mounting plate or backpan inside the enclosure. It connects to the electrical system via hardwired terminal lugs, as opposed to plugging into a modular busbar like Square D I-Line breakers.
Can I install this 3-pole breaker in a standard residential load center?
No. The FAL34020 is an industrial molded case circuit breaker designed specifically for Square D switchboards, motor control centers, and heavy-duty enclosures. It is not compatible with QO or Homeline residential panelboards.
Has the Square D FAL34020 been discontinued or replaced by a newer series?
Yes, the legacy Square D F-frame series has been largely replaced by the modern PowerPact B-Frame and H-Frame molded case circuit breakers. If you are upgrading, verify your physical space requirements, as modern replacements may require retrofitting to fit older enclosures.
Which terminal lug kit is standard on this 20A breaker?
The FAL34020 typically comes equipped with the AL50FA mechanical lug kit. These lugs safely accept the specified 14 to 4 AWG copper or 12 to 4 AWG aluminum wire ranges.
What does the LI trip function indicate on this model?
The LI designation stands for Long-Time and Instantaneous trip functions. The long-time component utilizes a fixed thermal mechanism for gradual overload protection, while the instantaneous component relies on a fixed magnetic mechanism to trip immediately during a severe short circuit.
Does the FAL34020 feature a visual trip indicator for troubleshooting?
Yes, this breaker is equipped with the Square D Visi-Trip indicator. When a fault or overload causes the breaker to trip, a high-visibility red indicator appears in the window, allowing operators to safely and quickly identify the tripped circuit in a busy panel.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 38 reviews.
Total 5 star reviews: 37 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 31 most recent customer reviews
Last updated 7/31/25
Customers say these electrical components arrive quickly and match their specifications perfectly. Many reviews mention competitive pricing and reliable shipping times. Common feedback includes satisfaction with product condition and fit. While most orders arrive as expected, a few customers note shipping delays. Frequent comments address the accuracy of product descriptions and ease of ordering.
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Rating
38 reviews
- 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!
- FGFrancis G.Verified BuyerReviewingSquare D FAL32100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/27/26YMCA
EXCELLENT SERVICE.