Square D FA36040G35 Molded Case Circuit Breaker
- 40A
- 3 Pole
- I-Line
Square D
FA36040G35
Molded Case Circuit Breaker
Brand
Square D
SKU
FA36040G35
Quantity
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Square D FA36040G35 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial applications, the Square D FA36040G35 is a 3-pole, 40A molded case circuit breaker from the legacy F-frame series. It features a specialized 50°C ambient calibration, making it ideal for high-temperature environments. This plug-on MCCB installs into Square D I-Line panelboards. As a legacy component, it is superseded by the HDA36040CA in newer installations. Rated for 18 kAIC at 480VAC, the breaker utilizes fixed thermal-magnetic trip technology.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA36040G35 |
| 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 |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 50C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, 50C Ambient Calibration |
Product FAQs
5 answersWhich panelboards accept the FA36040G35 circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It cannot be used in standard load centers or NQ/NF panelboards, as it requires the specific I-Line bus structure for installation.
What does the G35 suffix mean on this Square D FA breaker?
The G35 suffix designates a 50 degrees Celsius (122 degrees Fahrenheit) ambient temperature calibration. Standard breakers are typically calibrated for 40 degrees Celsius. This specialized calibration prevents nuisance tripping in high-temperature industrial environments.
What is the modern replacement for the legacy FA36040G35?
The FA series has been superseded by the Square D PowerPact H-frame line. The direct modern equivalent for this specific 50 degrees Celsius calibrated model is catalog number HDA36040CA, which matches the 40A rating, I-Line mounting, and high-temperature calibration.
Does the FA36040G35 require a separate mounting hardware kit?
No. As an I-Line molded case circuit breaker, it features built-in bus-clamping jaws. The breaker plugs directly into the I-Line panelboard bus assembly, eliminating the need for external mounting brackets or separate line-side cable connections.
How does the FA36040G35 indicate a tripped condition?
When the breaker trips due to an overcurrent or short circuit, the operating handle moves to a distinct center position halfway between ON and OFF. This provides a clear visual indication, allowing personnel to quickly identify the tripped breaker in a panelboard.
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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.