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Square D FH26050AB Molded Case Circuit Breaker
- 50A
- 2 Pole
- I-Line
Square D
FH26050AB
Molded Case Circuit Breaker
Brand
Square D
SKU
FH26050AB
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Square D FH26050AB - 50A 2 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-Frame series, this 50A thermal-magnetic breaker provides reliable overcurrent protection for industrial facilities. It installs into Square D I-Line panelboards and switchboards utilizing an AB phase connection. As a discontinued model, it is commonly replaced by the modern H-Frame HGA260501. Delivering a 65kAIC rating at 240VAC, the unit includes Visi-Trip visual indication and fixed long-time/instantaneous trip functions for robust circuit management.Specifications
| Brand | Square D |
|---|---|
| Part Number | FH26050AB |
| Series | FH |
| Amperage | 50A |
| 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, Visual Trip Indicator |
Product FAQs
6 answersWhat does the "AB" suffix mean in the FH26050AB catalog number?
The "AB" suffix indicates the breaker phase connection. It is designed to connect specifically to the A and B phases on the bus of a Square D I-Line panelboard.
Which panelboards are compatible with the FH26050AB circuit breaker?
This breaker is designed exclusively for use in Square D I-Line power distribution panelboards and switchboards. It features an I-Line style plug-in connection and will not fit standard load centers or NQ and NF panels.
Is the Square D FH26050AB an obsolete breaker?
Yes, the FH frame is a legacy F-Frame series that is no longer in active production by Schneider Electric. However, it remains widely used in existing I-Line panels and is available as a direct replacement part.
What is the modern replacement for the FH26050AB?
The modern equivalent for this legacy F-Frame breaker is the PowerPacT B-Frame series. Specifically, the BJA260501 is a direct 50A, 2-pole replacement that fits the same I-Line panelboards and features an AB phase connection.
How does the I-Line connection work on the FH26050AB?
The I-Line system uses a plug-on design with jaw connectors that attach directly to the panelboard bus assembly. This allows for fast mounting to the bus, while the load side uses standard mechanical lugs for wire termination.
Can the FH26050AB be used in DC power systems?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for up to 250VDC with a 10kA interrupting capacity, making it suitable for specific direct current applications.
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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