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Square D HJA260504 Molded Case Circuit Breaker
- 50A
- 2 Pole
- I-Line
Square D
HJA260504
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA260504
Quantity
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Square D HJA260504 - 50A 2 Pole Molded Case Circuit Breaker
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Description
A high-performance solution for industrial power, the Square D HJA260504 is a 50A, 2-pole molded case circuit breaker. It utilizes proven thermal-magnetic trip technology to safeguard critical electrical distribution networks. This component integrates into Square D I-Line panelboards and switchboards with a factory-configured BC phase connection. It serves as a seamless upgrade for legacy FA26050BC, FH26050BC, and FC26050BC breakers. It provides a 65kAIC interrupting rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA260504 |
| 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, I-Line Switchboards |
| Wire Gauge | 14-3/0 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 | Load Side Lugs |
| 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 |
Product FAQs
6 answersWhat panels are compatible with the Square D HJA260504 circuit breaker?
This breaker is designed for use in Square D I-Line panelboards and switchboards. It features a blow-on I-Line style plug-in connection on the line side and standard mechanical lugs on the load side.
What does the "4" suffix in the HJA260504 catalog number mean?
The "4" suffix indicates a BC phase connection. This means the 2-pole breaker is factory-configured to connect specifically to the B and C phases on the I-Line bus.
What wire size and material can be used with the HJA260504?
The factory-installed mechanical lugs accept 14 AWG to 3/0 AWG aluminum or copper wire.
How does the trip unit in the HJA260504 operate?
It uses a fixed thermal magnetic trip unit with Long-Time (L) and Instantaneous (I) functions. The thermal bimetal element responds to heat from overloads, while the magnetic element reacts instantly to short circuits.
What does the "J" in the HJA260504 catalog number indicate?
The "J" designates the breaker's interrupting capacity tier within the PowerPacT H-frame family. It signifies a high interrupting rating of 100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC.
Can the PowerPacT HJA260504 replace older Square D I-Line breakers?
Yes, the PowerPacT H-frame series is the modern replacement for legacy Square D F-frame I-Line breakers, such as the FA, FH, and FJA series. It can be installed in the same I-Line panelboards, provided the phase connection matches your circuit requirements.
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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