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Square D FAL34090-1021 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Unit Mount
Square D
FAL34090-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
FAL34090-1021
Quantity
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Square D FAL34090-1021 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Built for advanced control, the Square D FAL34090-1021 is a 3-pole, 90A MCCB. It integrates a 120VAC shunt trip, allowing facility managers to remotely open the circuit for emergency shutdowns. This F-Frame breaker mounts into Square D enclosures and motor control centers. It serves as a reliable replacement for legacy systems, with the HGL36090 acting as its modern equivalent. Delivering 18 kAIC at 480VAC, this thermal-magnetic breaker includes line and load lugs for secure wiring.Specifications
| Brand | Square D |
|---|---|
| Part Number | FAL34090-1021 |
| 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, Motor Control Centers |
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (120VAC) (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 answersWhat does the -1021 suffix indicate on the FAL34090-1021 circuit breaker?
The -1021 suffix indicates that this breaker includes a factory-installed 120/240VAC shunt trip. This allows the breaker to be tripped remotely for emergency shutdowns or control system integration.
What equipment is the FAL34090-1021 compatible with?
This F-frame unit-mount circuit breaker is designed for use in Square D enclosures, switchboards, and motor control centers. Because it is a feed-thru breaker with lugs on both the line and load sides, it does not plug onto a panelboard bus.
Is the FAL34090-1021 a current model, or has it been replaced?
The FAL series is a legacy F-frame molded case circuit breaker. While exact replacements depend on your panel's mounting constraints, the Square D PowerPact H-frame (such as the HGL36090) is typically considered the modern equivalent for new installations.
How do I wire the factory-installed shunt trip on the FAL34090-1021?
The internal shunt trip requires an external 120VAC or 240VAC control voltage source. When voltage is applied to the shunt trip control wires, the breaker mechanism will open, disconnecting power to the load.
Can the FAL34090-1021 be reverse fed?
Yes, standard Square D FAL circuit breakers do not have restrictive line or load markings, meaning they can be reverse fed for versatile wiring layouts.
Is the FAL34090-1021 rated for 100% continuous duty?
No, like most standard molded case circuit breakers, the FAL34090-1021 is rated for 80% continuous duty. Continuous loads should not exceed 72 amps, which is 80% of its 90A rating.
Are the trip settings adjustable on the FAL34090-1021?
No, this breaker features fixed thermal and fixed magnetic trip elements. It does not have adjustable dials for long-time or instantaneous pickup.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 39 reviews.
Reviews Summary
Generated by AI from 39 most recent customer reviews
Last updated 9/25/26
Customers say this circuit breaker arrives in excellent condition and works as expected. The product performs flawlessly and functions reliably. Many reviews highlight fast shipping, competitive pricing, and quick delivery times. Users appreciate the availability of refurbished and obsolete models. The parts arrive well-packed and in like-new condition. Common feedback addresses excellent communication and straightforward ordering. Overall, customers report satisfaction with product quality, value, and prompt service fulfillment.
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Rating
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!