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Square D BJA260504 Molded Case Circuit Breaker
- 50A
- 2 Pole
- I-Line
Square D
BJA260504
Molded Case Circuit Breaker
Brand
Square D
SKU
BJA260504
Quantity
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Square D BJA260504 - 50A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial power distribution, the Square D BJA260504 is a 2-pole, 50A molded case circuit breaker. It belongs to the PowerPacT B-Frame series, offering advanced thermal-magnetic trip protection. This unit mounts into Square D I-Line panelboards and features a BC phase connection. It is the designated replacement for the discontinued FH26050BC. With an interrupting capacity of 65 kAIC at 480VAC, it handles demanding fault currents. The breaker is also HACR rated.Specifications
| Brand | Square D |
|---|---|
| Series | BJA |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 50kA @ 250VDC |
| Frame Type | BJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-2/0 AWG (Al/Cu) |
| Max Wire | 2/0 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, Handle Padlock Attachment |
|---|---|
| Accessories | BC Phase Connection |
| Standards | CSA C22.2 No 5, EN/IEC 60947-2, GB 14048.2, NEMA AB 1, NMX J-266, UL 489 |
| Approval | CCC, CE, CSA, EAC, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, Phase BC Connection, Reverse Feed |
Product FAQs
6 answersWhat type of panelboards are compatible with the BJA260504 circuit breaker?
This breaker is designed exclusively for Square D I-Line power distribution panelboards and switchboards. It features an I-Line plug-on connection for the line side, allowing for rapid installation onto the panel bus.
Can the PowerPacT B-frame BJA260504 replace older Square D breakers?
Yes, the PowerPacT B-frame series was introduced to replace legacy Square D FA and FH frame molded case circuit breakers. It maintains the same mounting space dimensions in I-Line panelboards, making retrofits and upgrades straightforward.
What wire sizes and tightening torques are required for the load-side lugs?
The mechanical lugs accept 14 to 2/0 AWG aluminum or copper wire. The required tightening torque is 31.9 to 38.9 lb-in for 14 to 10 AWG wire, and 44.3 to 54.9 lb-in for 8 to 2/0 AWG wire.
Is the BJA260504 rated for use in DC electrical systems?
Yes, this breaker is rated for DC applications up to 250VDC with an interrupting capacity of 50kA. This makes it suitable for industrial control panels, battery backups, and solar distribution systems.
What does the LI trip function code mean on this breaker?
The LI designation indicates a thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) protection. The Long-Time function protects against thermal overloads, while the Instantaneous function provides immediate magnetic tripping during short circuits. Both settings are fixed on this model.
How does the I-Line mounting style work on the BJA260504?
The I-Line mounting system uses a plug-on bracket that engages directly with the continuous bus bar on the line side. The load side utilizes standard mechanical lugs for wire termination. This design allows the breaker to be securely mounted and aligned without requiring separate line-side cabling.
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