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Square D FAL34090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Unit Mount
Square D
FAL34090
Molded Case Circuit Breaker
Brand
Square D
SKU
FAL34090
Quantity
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Square D FAL34090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FAL34090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FAL34090 |
| Series | FAL |
| Amperage | 90A |
| 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 |
| 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) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Quantity
Square D FAL34090 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FAL34090-R |
| Series | FAL |
| Amperage | 90A |
| 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 |
| 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) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
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Description
Engineered for commercial applications, the Square D FAL34090 is a 3-pole, 90A molded case circuit breaker. It provides robust thermal-magnetic protection for critical electrical systems. This unit-mount breaker installs into compatible Square D enclosures and switchboards. As a legacy F-Frame component, it replaces older units, with the BDL36090 serving as its modern substitute. Rated 18 kAIC at 480VAC, it features fixed trip settings, factory-installed lugs, and a HACR rating.Specifications
| Brand | Square D |
|---|---|
| Part Number | FAL34090 |
| Series | FAL |
| Amperage | 90A |
| 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 |
| 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) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersWhat is the difference between the Square D FAL34090 and the FA34090?
The FAL34090 is a unit-mount (feed-thru) circuit breaker designed to be bolted directly to a backpan or enclosure. The FA34090 is an I-Line breaker designed to plug onto an I-Line busbar system. They are not interchangeable.
Is the FAL34090 still in active production by Square D?
No, the Square D F-frame series is a legacy product. For new installations, Schneider Electric has replaced the F-frame with the PowerPact B-frame series. However, the FAL34090 remains available as a direct replacement for existing panels.
Can I adjust the trip settings on the FAL34090?
No, this breaker features fixed thermal and fixed magnetic trip elements. It does not have adjustable dials for the long-time or instantaneous trip functions.
Can the FAL34090 be reverse fed?
Yes, standard Square D F-frame thermal-magnetic breakers like the FAL34090 can be reverse fed, provided they do not have specific Line and Load markings restricting power flow direction.
What is the difference between FAL, FHL, and FCL breakers?
These prefixes indicate the interrupting capacity of the F-frame breaker. FAL is the standard interrupting version (18kA at 480VAC), FHL is the high interrupting version, and FCL is the extra-high interrupting version.
Does the FAL34090 come with lugs on both the line and load sides?
Yes, as a feed-thru unit-mount breaker, the FAL34090 includes lugs on both the line and load sides for direct wire connections.
What does the LI trip function code mean on the FAL34090?
LI stands for Long-Time and Instantaneous trip functions. The long-time function provides thermal overload protection, while the instantaneous function provides magnetic short-circuit protection.
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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.