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Square D HJA260501 Molded Case Circuit Breaker
- 50A
- 2 Pole
- I-Line
Square D
HJA260501
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA260501
Quantity
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Square D HJA260501 - 50A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial power distribution, the Square D HJA260501 is a 2-pole, 50A molded case circuit breaker from the PowerPact H-Frame family. It provides robust thermal-magnetic protection for demanding systems. This unit mounts into Square D I-Line panelboards and switchboards. It features an AB phase connection and serves as a drop-in replacement for legacy FA26050 and FH26050 breakers. Rated for 65kAIC at 480VAC, it includes fixed long-time and instantaneous trips.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA260501 |
| Series | HJA |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | H |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 14 AWG - 3/0 AWG (Al/Cu) |
| Max Wire | 3/0 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, Motor Operator |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
8 answersWhat panelboards are compatible with the HJA260501 circuit breaker?
This breaker features an I-Line style plug-in connection and is exclusively designed for use in Square D I-Line panelboards and switchboards. It will not fit in standard QO, Homeline, or NQ/NF panels.
Can the PowerPacT HJA260501 replace older Square D legacy breakers?
Yes, the PowerPacT H-frame series is the modern replacement for legacy Square D F-frame breakers, such as the FA, FH, and FC series. When replacing an older breaker, verify that the interrupting rating and physical space requirements match your application.
What does the J in the HJA260501 catalog number signify?
The J indicates the interrupting rating performance level of the breaker. For this model, it signifies a high interrupting capacity of 100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC.
Is the HJA260501 suitable for DC voltage applications?
Yes, this thermal-magnetic breaker is rated for DC applications up to 250VDC, with a DC interrupting rating of 20kA.
How does the I-Line connection type mount into the panel?
I-Line breakers like the HJA260501 feature a plug-on design for the line side that snaps directly onto the panelboard bus, while the load side uses traditional mechanical lugs for wire termination. This allows for fast, tool-free line-side installation.
What wire sizes are accepted by the load-side lugs on this 50A breaker?
The factory-installed lugs accept 14 AWG to 3/0 AWG aluminum or copper wire. Always refer to the breaker faceplate for exact torque specifications during installation.
What is the difference between the HJA260501 and HDA260501?
The difference is the interrupting rating. The HDA model has a standard D rating (25kA at 240VAC, 18kA at 480VAC), while the HJA model has a higher J rating (100kA at 240VAC, 65kA at 480VAC). Both share the same 50A trip, 2-pole configuration, and H-frame physical size.
What type of trip unit is installed in the HJA260501?
It features a fixed thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) protection functions. The thermal and magnetic trip points are factory-set and non-adjustable.
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Reviews
Review summary
Customers rate this product 4.7 out of 5 based on 15 reviews.
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Rating
15 reviews
- RFRon F.Verified BuyerReviewingSquare D HJA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D HJA36050 review
The delivery was on and exactly what I ordered as usual. I highly recommend Super Breakers!
- CMChris M.Verified BuyerReviewingSquare D HJA36080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/23/26Quick delivery
Everything arrived correctly and on time.
- HEHeineken E.Verified BuyerReviewingSquare D HJA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/9/26Quick Delivery
Good condition Quick Delivery
- JBJosh B.Verified BuyerReviewingSquare D HJA36060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/30/26Quick Shipping
Breaker showed up quickly and as described.
- JCJoe C.Verified BuyerReviewingSquare D HJA36035 - 35A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars7/29/25HJA
Shipped fast