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Square D FAL12100 Molded Case Circuit Breaker
- 100A
- 1 Pole
- Unit Mount
Square D
FAL12100
Molded Case Circuit Breaker
Brand
Square D
SKU
FAL12100
Quantity
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Square D FAL12100 - 100A 1 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial power distribution, the FAL12100 is a 1-pole, 100A molded case circuit breaker from Square D. It features a unit mount design for integration into compatible enclosures, switchboards, and control panels. Operating with thermal-magnetic trip technology, it delivers reliable long-time and instantaneous (LI) protection. This legacy F-Frame breaker is rated 10kAIC at 120VAC and includes AL100FA lugs. It has been superseded by the PowerPacT B-Frame (BDL16100).Specifications
| Brand | Square D |
|---|---|
| Part Number | FAL12100 |
| Series | FAL |
| Amperage | 100A |
| Poles | 1 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Control Panels |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL100FA) |
| 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
7 answersWhat is the modern replacement for the legacy Square D FAL12100?
The FAL12100 F-Frame breaker has been superseded by the PowerPacT B-Frame series. The recommended direct replacement is catalog number BDL16100, which maintains the 100A, 1-pole configuration while offering a more compact footprint and higher interrupting capacity.
What are the lug torque specifications for the FAL12100?
This breaker is equipped with AL100FA mechanical lugs. When terminating 14 to 1/0 AWG copper or 12 to 1/0 AWG aluminum conductors, the required tightening torque is 50 lb-in (5.6 N-m).
Can the FAL12100 be installed in an I-Line panelboard?
No, the FAL12100 is a unit-mount circuit breaker designed to be bolted to a backpan in standard enclosures, switchboards, or control panels. It lacks the plug-on jaw connections required for I-Line panelboards.
Is the FAL12100 suitable for direct current (DC) applications?
Yes, the FAL12100 is rated for use in DC circuits up to 125V DC, where it provides an interrupting capacity of 5kAIC.
How is the FAL12100 secured inside a control panel?
As a unit-mount breaker, the FAL12100 is secured by driving mounting screws directly through the breaker body into a tapped backpan or mounting plate. It does not snap onto a DIN rail or plug onto a busbar.
What wire materials are compatible with the FAL12100 terminals?
The factory-installed AL100FA lugs are dual-rated for both copper (Cu) and aluminum (Al) conductors, accepting 14 to 1/0 AWG copper or 12 to 1/0 AWG aluminum wire.
Does the FAL12100 feature adjustable trip settings?
No, the FAL12100 features a fixed thermal-magnetic trip unit. Both the long-time (thermal) and instantaneous (magnetic) trip functions are factory-set and cannot be adjusted in the field.
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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!