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Square D FA341001042 Molded Case Circuit Breaker
- 100A
- 3 Pole
- I-Line
Square D
FA341001042
Molded Case Circuit Breaker
Brand
Square D
SKU
FA341001042
Quantity
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Square D FA341001042 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial distribution, this 100-amp molded case circuit breaker delivers dependable thermal-magnetic protection. It mounts into Square D I-Line panelboards and switchboards, utilizing a plug-on phase connection for fast, secure installation. Equipped with a factory-installed 12/24V AC/DC shunt trip, the unit allows for remote tripping capabilities in safety or control circuits. For facility upgrades, this legacy breaker is replaced by the modern HDA36100.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA341001042 |
| Series | FA |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip |
| 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
6 answersWhat does the 1042 suffix indicate on the FA341001042?
The 1042 suffix designates a factory-installed 12/24V AC/DC shunt trip. This accessory allows the breaker to be opened remotely via a control signal, which is commonly used for emergency stops or automated safety disconnects.
Can I install the FA341001042 in a standard QO or NQ load center?
No. The FA341001042 is an F-frame molded case circuit breaker with an I-Line mounting style. It is exclusively compatible with Square D I-Line panelboards and switchboards, and will not fit in QO, NQ, or NF series panels.
What is the modern replacement for the FA341001042 I-Line breaker?
The legacy FA series has been superseded by the Square D PowerPact H-frame lineup. The base replacement is the HDA36100, but to replicate the remote tripping capability of the 1042 suffix, a compatible 12/24V shunt trip accessory must be installed in the PowerPact breaker.
How do I wire the shunt trip on the FA341001042?
The factory-installed shunt trip includes control wire leads that exit the breaker housing. These leads must be connected to an external 12V or 24V AC/DC power source routed through a normally open contact, such as an emergency stop button or control relay.
Does the FA341001042 provide ground fault or arc fault protection?
No. This breaker features standard thermal magnetic trip technology for overload and short-circuit protection. It does not include GFCI or AFCI capabilities.
Can the trip settings on the FA341001042 be adjusted for specific coordination requirements?
No. The FA341001042 features fixed thermal and fixed magnetic trip settings. If your application requires adjustable long-time or instantaneous pickup settings for selective coordination, you will need to upgrade to a breaker with an electronic trip unit.
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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.