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Square D FA24070AB Molded Case Circuit Breaker
- 70A
- 2 Pole
- I-Line
Square D
FA24070AB
Molded Case Circuit Breaker
Brand
Square D
SKU
FA24070AB
Quantity
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Square D FA24070AB - 70A 2 Pole Molded Case Circuit Breaker
New
Quantity
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Square D FA24070AB - 70A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | FA24070AB |
| Series | FA |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Phase Connection AB |
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Square D FA24070AB - 70A 2 Pole Molded Case Circuit Breaker
Re-Certified
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| Brand | Square D |
|---|---|
| Part Number | FA24070AB-R |
| Series | FA |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Phase Connection AB |
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Description
Built for demanding industrial power systems, this 70A breaker provides essential overcurrent protection. The two-pole FA series component is factory-configured for Phase A-B connections to assist with load balancing. Designed exclusively for Square D I-Line panelboards, it utilizes a robust plug-on mounting mechanism. When upgrading infrastructure, the PowerPact HDA260702 serves as the recommended replacement. An 18kA rating at 480VAC guarantees dependable performance during fault events.Specifications
| Brand | Square D |
|---|---|
| Part Number | FA24070AB |
| Series | FA |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Phase Connection AB |
Product FAQs
7 answersWhat does the AB suffix indicate on the FA24070AB circuit breaker?
The AB suffix specifies the phase connection. It indicates this 2-pole breaker is factory-configured to connect to the A and B phases of the I-Line bus, which helps electricians balance loads across the panelboard.
What is the modern replacement for the legacy FA24070AB?
The FA series is a legacy F-frame component. When upgrading or replacing this unit, the Square D PowerPact B-frame series is the modern equivalent. Specifically, the BDA24070Y1 serves as the direct I-Line replacement for this 70A, 2-pole breaker.
Which panelboards accept the FA24070AB breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a specialized plug-on mounting mechanism that connects directly to the I-Line bus structure.
What wire sizes and materials are compatible with the factory lugs?
The standard mechanical lugs on this breaker accept both copper (Cu) and aluminum (Al) conductors ranging from 14 AWG to 1/0 AWG.
Is the FA24070AB suitable for direct current (DC) applications?
Yes, this thermal-magnetic breaker is rated for use in DC systems up to 250VDC, providing a 10kAIC interrupting rating for those applications.
How does the I-Line mounting mechanism perform during a fault?
The I-Line plug-on connection utilizes a blow-on jaw design. During a high-fault short circuit, the magnetic forces generated cause the connector jaws to grip the busbar tighter, reducing the risk of arcing and improving safety.
Are the thermal or magnetic trip functions adjustable on this breaker?
No, the FA24070AB features a fixed thermal-magnetic trip unit. Both the long-time overload protection and instantaneous short-circuit protection are factory-calibrated and cannot be adjusted 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.