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Square D FH26080AB Molded Case Circuit Breaker
- 80A
- 2 Pole
- I-Line
Square D
FH26080AB
Molded Case Circuit Breaker
Brand
Square D
SKU
FH26080AB
Quantity
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Square D FH26080AB - 80A 2 Pole Molded Case Circuit Breaker
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Description
Delivering robust thermal-magnetic protection for commercial and industrial applications, the Square D FH26080AB is a 2-pole, 80-amp molded case circuit breaker. It features an AB phase connection. It installs into Square D I-Line panelboards using a secure plug-on mounting style. As a legacy component, it serves as an exact replacement for older systems, with the HGA260801 as its modern substitute. Rated for 25 kAIC at 480VAC, it includes long-time and instantaneous (LI) trip functions.Specifications
| Brand | Square D |
|---|---|
| Part Number | FH26080AB |
| Series | FH |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (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 |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Phase Connection AB |
Product FAQs
7 answersWhat is the modern replacement for the legacy FH26080AB circuit breaker?
The FH26080AB is a legacy F-frame breaker. Its modern substitute is the Square D PowerPact H-frame series, specifically catalog number HGA260801, which offers the same 80A rating and I-Line plug-on mounting.
What does the AB suffix indicate on this circuit breaker?
The AB suffix specifies the phase connection for the I-Line plug-in jaw. It indicates that this 2-pole breaker connects to the A and B phases on the panelboard bus.
Can I install the FH26080AB in a standard QO or NQ load center?
No. This breaker features an I-Line style plug-in connection and is designed exclusively for use in Square D I-Line panelboards and switchboards. It is not compatible with standard QO or NQ load centers.
Is the FH26080AB interchangeable with other legacy F-frame breakers?
Yes, as part of the legacy Square D F-frame family, it shares the same physical footprint and I-Line mounting as other F-frame breakers like the FA and FC series. However, you must verify that the interrupting ratings meet your system requirements, as the FH series has a higher interrupting capacity than the standard FA series.
What does the LI trip function code mean on this thermal-magnetic breaker?
The LI code indicates that the breaker provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function protects against short circuits. Both thermal and magnetic trip points are fixed on this model.
How does the I-Line mounting system work for the FH26080AB?
The breaker plugs directly onto the I-Line bus stack using plug-on jaws and is secured to the backpan with a mounting bracket and screw. This allows for quick installation and phase balancing without requiring individual wire connections to the bus.
Is the FH26080AB suitable for DC voltage applications?
Yes, in addition to its AC ratings, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA. This makes it suitable for specific DC control circuits or battery systems.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 10 reviews.
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Rating
10 reviews
- DMDonald M.Verified BuyerReviewingSquare D FH36030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Excellent Service
The support team with Super Breakers went over and beyond in ensuring the breakers were on site for an emergency repair…
CAVA Construction Manager very pleased!
Donald Mayo
Mayo Electric
- PHpayton h.Verified BuyerReviewingSquare D FH36090 - 90A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26great
great straightforward company has almost everything you could ever need in stock
- SGShawn G.Verified BuyerReviewingSquare D FH36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/20/26Thanks !
Excellent service & gear per usual !
Thanks !
- EEarnestVerified BuyerReviewingSquare D FH36060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/3/25Fast delivery and quality
The breaker was in great condition.
- JPJason P.Verified BuyerReviewingSquare D FH36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/5/25Breakers
Order was placed and they came in on time in good condition