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Square D FA36020-1021 Molded Case Circuit Breaker
- 20A
- 3 Pole
- I-Line
Square D
FA36020-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA36020-1021
Quantity
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Square D FA36020-1021 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Square D FA36020-1021 - 20A 3 Pole Molded Case Circuit Breaker
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| Brand | Square D |
|---|---|
| Part Number | FA36020-1021-R |
| Series | FA |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (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 |
Quantity
Square D FA36020-1021 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA36020-1021-R |
| Series | FA |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (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 |
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Description
Engineered for advanced control, the Square D FA36020-1021 is a 3-pole, 20A molded case circuit breaker. It features a factory-installed 120-240VAC shunt trip mechanism, allowing users to remotely open the circuit for emergency shutdowns. Designed for Square D I-Line panelboards, this F-frame breaker utilizes a robust plug-on mounting system. It serves as a replacement for older systems and is superseded by the HDA36020SA. It delivers 25kAIC at 240V and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA36020-1021-R |
| Series | FA |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-4 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 4 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (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 -1021 suffix mean on the FA36020-1021 circuit breaker?
The -1021 suffix indicates that this breaker includes a factory-installed 120-240VAC shunt trip mechanism. This allows the circuit to be opened remotely for emergency shutdowns or automated control systems.
What is the modern replacement for the legacy FA36020-1021 breaker?
The Square D FA36020-1021 is part of the legacy F-frame series and has been superseded by the PowerPact H-frame series. The direct modern equivalent with a factory-installed shunt trip is the HDA36020SA.
Which panelboards are compatible with the FA36020-1021?
This breaker features an I-Line plug-on mounting style and is designed exclusively for use in Square D I-Line panelboards and switchboards. It will not fit in standard residential load centers or standard plug-on commercial panels.
How does the shunt trip mechanism on this breaker operate?
The factory-installed shunt trip requires an external 120-240VAC control voltage signal. When voltage is applied to the shunt trip coil from a remote switch or relay, it mechanically trips the breaker to open the circuit.
Does this breaker include a visual trip indicator?
Yes, Square D FA series breakers feature a Visi-Trip indicator. When the breaker trips due to an overcurrent, short circuit, or a shunt trip signal, the handle moves to a center position and a highly visible red indicator appears to help quickly identify the tripped breaker.
Can I adjust the trip settings on the FA36020-1021?
No, this F-frame breaker has fixed thermal and fixed magnetic trip elements. Unlike some larger or electronic trip breakers, the long-time and instantaneous trip points on this model cannot be modified in the field.
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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.