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Square D FA36015-1021 Molded Case Circuit Breaker
- 15A
- 3 Pole
- I-Line
Square D
FA36015-1021
Molded Case Circuit Breaker
Brand
Square D
SKU
FA36015-1021
Quantity
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Square D FA36015-1021 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial distribution, this 15A molded case circuit breaker integrates a factory-installed 120-240VAC shunt trip mechanism. The F-frame design delivers reliable thermal-magnetic protection for critical circuits. Installation into Square D I-Line panelboards is streamlined via the plug-on bus connection. Rated for 25kA interrupting capacity at 240VAC, it includes load-side lugs and a Visi-Trip indicator for rapid fault identification.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA36015-1021 |
| Series | FA |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 14-4 AWG (Cu/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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip, Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the FA36015-1021?
The -1021 suffix signifies that this breaker comes with a factory-installed 120/240VAC shunt trip mechanism. This feature allows the breaker to be tripped remotely by applying voltage to the shunt trip coil, which is commonly used for emergency shutdown systems or remote control applications.
What is the modern replacement for the legacy FA36015-1021?
The Square D FA-frame is a legacy series. When upgrading or replacing this unit with current technology, the base FA36015 is typically replaced by the newer PowerPact B-Frame (BDA36015) or H-Frame (HDA36015) models. To match the -1021 suffix, a 120/240VAC shunt trip accessory must be added to the replacement PowerPact breaker.
How does the I-Line mounting system work for this breaker?
The I-Line plug-in design allows the breaker to snap directly onto the busbar stack of a Square D I-Line panelboard or switchboard. This eliminates the need for bolt-on connections on the line side, significantly reducing installation time and ensuring a secure, consistent phase connection. The load side utilizes standard mechanical lugs.
Are the load lugs included with this I-Line breaker, and what wire types are supported?
Yes, the FA36015-1021 includes standard mechanical load lugs. Because it is an I-Line breaker, the line side connects directly to the panel bus, while the load side lugs accept either copper (Cu) or aluminum (Al) conductors ranging from 14 AWG to 4 AWG.
What does the LI trip function code mean for the FA36015-1021?
The LI designation indicates that the thermal-magnetic trip unit provides two types of protection: Long-Time (L) and Instantaneous (I). The Long-Time function uses a bimetallic thermal element to protect against sustained overloads, while the Instantaneous magnetic function responds immediately to high-level short circuits. Both settings are fixed on this model.
Can the FA36015-1021 be used in direct current (DC) systems?
Yes, this breaker is rated for use in DC applications up to 250VDC, with a direct current interrupting rating of 10kA. When installing in a DC system, ensure the wiring and panelboard configuration comply with the manufacturer guidelines for DC 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.