Square D FA360401212 Molded Case Circuit Breaker
- 40A
- 3 Pole
- I-Line
Square D
FA360401212
Molded Case Circuit Breaker
Brand
Square D
SKU
FA360401212
Quantity
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Square D FA360401212 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Built to support complex industrial monitoring, this 40-ampere thermal-magnetic breaker includes a factory-mounted 1a1b auxiliary contact. The assembly installs into standard I-Line panelboards, delivering reliable long-time and instantaneous overcurrent defense. Rated for 18 kAIC at 480V, the unit utilizes the proven Visi-Trip indicator for clear status visualization. Facilities migrating to newer platforms can utilize the PowerPact HDA36040 equipped with add-on contacts.Specifications
| Brand | Square D |
|---|---|
| Series | FA |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 14kA @ 600Y/347VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Auxiliary Switch |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
7 answersWhat does the "1212" suffix indicate on the FA360401212 circuit breaker?
The "1212" suffix means this breaker includes a factory-installed 1A/1B (one normally open, one normally closed) auxiliary switch used for remote status signaling.
Which panelboards are compatible with the FA360401212?
This breaker is designed exclusively for use in Square D I-Line panelboards and I-Line switchboards. It features an I-Line style plug-in connection and will not fit standard load centers or NQ/NF panels.
Does the FA360401212 require a separate mounting hardware kit for I-Line panels?
No. I-Line breakers feature a plug-in mounting design where the breaker jaws engage directly with the panelboard busbar stack. A separate mounting hardware kit is not required.
Is the FA360401212 HACR rated?
Yes, Square D FA frame breakers are HACR rated, making them suitable for use with heating, air conditioning, and refrigeration equipment.
Can the trip settings on the FA360401212 be adjusted in the field?
No. This breaker features a fixed thermal-magnetic trip unit. Both the long-time thermal overload and instantaneous magnetic short-circuit trip points are factory set and cannot be adjusted.
What is the replacement lug kit for the FA360401212?
The standard replacement lug kit for this breaker is the AL100FA, which accepts 14 to 1/0 AWG copper or 12 to 1/0 AWG aluminum wire.
Is the FA frame a current production breaker?
The FA frame is a legacy molded case circuit breaker from Square D. While it has been largely superseded by the PowerPact series in new installations, FA breakers remain available for maintaining and expanding existing I-Line equipment.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 70 reviews.
Reviews Summary
Generated by AI from 68 most recent customer reviews
Last updated 8/15/26
Customers say this circuit breaker matches its description, fits perfectly, and works as expected. Many reviews highlight fast shipping and quick delivery times, with several noting orders arrived within days. Users appreciate the product condition, describing refurbished units as appearing new without wear or marks. Common feedback addresses competitive pricing compared to local suppliers and the overall value proposition. Customers report straightforward ordering processes and reliable service, with repeat purchasers noting consistent positive experiences. The breaker installed easily and functioned properly in various applications.
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Rating
70 reviews
- CPCasey P.Verified BuyerReviewingSquare D FA34030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Great company
Ordered on a Saturday evening, paid for two day shipping and it arrived on time and in perfect condition. Would 100 percent be using this company going forward, beat out pricing and shipping times for all my local supply houses. Plus the staff were great to deal with.
- AHAnn H.Verified BuyerReviewingSquare D FA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/22/26Professional Service
So far, so good! The circuit breaker was installed along with a new compressor for our church AC, and everything is now working well.
The company has been professional, dependable, and reputable throughout the process. I had a question after the installation, and it was answered immediately. I also appreciated that they followed up and asked for feedback to make sure the new part was working properly and that we were satisfied with the service.
It’s refreshing to deal with a company that not only has quality products but also cares about its customers after the job is completed. I would definitely recommend them!
- RErene e.Verified BuyerReviewingSquare D FA34070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/14/26breaker
breaker was just as discribed
- BEBallentine E.Verified BuyerReviewingSquare D FA24060AC - 60A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/15/26Great
Accurate and on time.
- EBEdward B.Verified BuyerReviewingSquare D FA32100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26As good as new
The Square D FA32100 circuit breaker (refurbished) was as good as a new breaker, without exception. There was no wear and tear or any marks at all. It was basically new. It is an excellent choice and a great product without having to pay the cost of a new breaker.