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Square D FA36090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- I-Line
Square D
FA36090
Molded Case Circuit Breaker
Brand
Square D
SKU
FA36090
Quantity
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Square D FA36090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D FA36090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA36090 |
| Series | FA |
| Amperage | 90A |
| 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, Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 |
Quantity
Square D FA36090 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA36090-R |
| Series | FA |
| Amperage | 90A |
| 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, Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 |
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Description
Built for robust industrial applications, the Square D FA36090 is a 90A, 3-pole molded case circuit breaker. It utilizes thermal-magnetic trip technology to deliver reliable long-time and instantaneous (LI) circuit protection. Designed with an I-Line plug-on mounting style, this F-Frame unit integrates into compatible Square D panelboards and switchboards. It serves as a legacy replacement part and is superseded by the PowerPact HGA36090. It features a 25kAIC rating at 240V and Visi-Trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA36090 |
| Series | FA |
| Amperage | 90A |
| 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, Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| 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 |
Product FAQs
8 answersWhat is the modern replacement for the discontinued FA36090?
The FA36090 is a legacy F-Frame circuit breaker [1.1.2]. Schneider Electric recommends the PowerPact B-Frame BDA36090 as the direct replacement. The PowerPact H-Frame HDA36090 is also frequently used as a 90A, 3-pole I-Line upgrade since it offers the same 18kAIC at 480V interrupting capacity.
What are the magnetic trip settings for this circuit breaker?
The FA36090 features fixed thermal and magnetic trip elements. The magnetic hold current is factory set at 900A, and the magnetic trip current is set at 1700A.
Can the FA36090 be installed in DC systems?
Yes, this breaker is rated for direct current applications. It can be applied on ungrounded systems up to 250VDC with a maximum interrupting capacity of 10kA.
What type of panelboard accepts the FA36090?
This breaker features an I-Line style plug-in line connection. It is designed exclusively for mounting in Square D I-Line panelboards and switchboards, and will not fit in QO, NQ, or NF series load centers.
Which wire sizes are compatible with the load lugs?
The standard AL100FA mechanical lugs on the load side accept 14 to 1/0 AWG copper conductors, or 12 to 1/0 AWG aluminum conductors.
How is the line connection made on this breaker?
As an I-Line unit, the line side features plug-on jaws that clamp securely onto the busbars of an I-Line panelboard. The load side utilizes standard mechanical lugs for outgoing field wiring.
What does the LI trip function indicate for safety protection?
The LI designation means the thermal-magnetic trip unit provides Long-Time (L) protection against sustained thermal overloads and Instantaneous (I) protection against high-level short circuits. Both the thermal and magnetic pickup points are fixed.
Is the FA36090 suitable for heating and cooling equipment?
Yes. It is HACR rated, which means it is safety certified for use with heating, air conditioning, and refrigeration equipment that requires multi-motor or combination-load circuit protection.
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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.