Square D FA36040-1212 Molded Case Circuit Breaker
- 40A
- 3 Pole
- I-Line
Square D
FA36040-1212
Molded Case Circuit Breaker
Brand
Square D
SKU
FA36040-1212
Quantity
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Square D FA36040-1212 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Utilizing a factory-installed 1A/1B auxiliary switch, this three-phase breaker enables remote monitoring of the contact position. The internal switch provides one normally open and one normally closed contact, allowing facility systems to track whether the primary circuit is energized or disconnected. Installation into Square D I-Line panelboards is achieved through the standard plug-on jaw connection.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA36040-1212 |
| 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 | F-Frame |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Auxiliary Switch (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
6 answersWhat does the -1212 suffix mean on the FA36040-1212 part number?
The -1212 suffix indicates that this circuit breaker is equipped with a factory-installed 1A/1B (one normally open, one normally closed) auxiliary switch for remote status signaling.
Which panelboards are compatible with this breaker?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It will not fit in standard load centers or NQ/NF series panels.
Are the trip settings adjustable on the FA36040-1212?
No, this breaker 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.
What wire sizes are accepted by the terminals on this 40A breaker?
The factory-installed lugs accept wire gauges ranging from 14 AWG up to 1/0 AWG. The terminals are rated for use with both copper (Cu) and aluminum (Al) conductors.
How does the I-Line mounting system work for this breaker?
The breaker features a plug-on design that connects directly to the panelboard bus stack for the electrical line-side feed. It is then secured to the panel backpan for mechanical support.
Can this breaker be used in direct current (DC) applications?
Yes, in addition to its AC ratings, the FA36040-1212 is rated for up to 250VDC with a 10kA interrupting capacity, making it suitable for compatible DC systems.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 71 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
71 reviews
- RLRichard L.Verified BuyerReviewingSquare D FA34090 - 90A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/30/26Mill Superintendant
Works great!
We will definitely use SuperBreakers again.
Thank you!
Richard
- 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.