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Square D FA14050B Molded Case Circuit Breaker
- 50A
- 1 Pole
- I-Line
Square D
FA14050B
Molded Case Circuit Breaker
Brand
Square D
SKU
FA14050B
Quantity
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Square D FA14050B - 50A 1 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-Frame series, this 50A molded case circuit breaker provides thermal-magnetic protection for commercial and industrial electrical systems. It installs into Square D I-Line panelboards and switchboards, utilizing a factory-configured phase B jaw connection. Featuring a 25kAIC rating at 120VAC and the signature Visi-Trip indicator, it ensures rapid fault identification. This unit is officially replaced by the PowerPacT BDA140502 for modern upgrades.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA14050B |
| Series | FA |
| Amperage | 50A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 120VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 120VAC, 18kA @ 277VAC, 10kA @ 125VDC |
| Frame Type | FA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Phase Connection B |
| 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 answersIs the Square D FA14050B circuit breaker obsolete, and what is the direct replacement?
Yes, the legacy FA frame has been discontinued. The direct drop-in replacement is the PowerPact B-Frame BDA160503, which maintains the 50A rating, 1-pole configuration, and Phase B I-Line connection.
What does the B suffix in the FA14050B catalog number indicate?
For Square D 1-pole I-Line circuit breakers, the suffix specifies the bus phase connection. The B indicates this breaker mounts specifically to Phase B of the panelboard bus.
Can I install the FA14050B in a standard QO or NQ load center?
No, this F-Frame breaker features an I-Line style plug-in connection. It is strictly compatible with Square D I-Line panelboards and switchboards, not standard residential or NQ commercial load centers.
Is the FA14050B suitable for DC voltage applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is certified for DC systems. It provides an interrupting capacity of 10kA at 125VDC.
What wire sizes are supported by the terminals on the FA14050B?
The factory lugs accept conductor sizes ranging from 14 AWG to 1/0 AWG. The terminals are dual-rated for both copper and aluminum wiring.
Does the FA14050B offer adjustable trip settings for coordination?
No, this legacy MCCB utilizes a thermal-magnetic trip unit with fixed long-time and fixed instantaneous (LI) functions. It does not support field-adjustable trip settings.
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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.