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Square D BJA260402 Molded Case Circuit Breaker
- 40A
- 2 Pole
- I-Line
Square D
BJA260402
Molded Case Circuit Breaker
Brand
Square D
SKU
BJA260402
Quantity
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Square D BJA260402 - 40A 2 Pole Molded Case Circuit Breaker
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Description
Built for demanding electrical environments, the Square D BJA260402 is a 2-pole, 40A MCCB within the PowerPacT B-Frame lineup. It utilizes a thermal-magnetic trip mechanism providing long-time and instantaneous (LI) protection. Designed for Square D I-Line panelboards, this breaker features an AC phase connection. It is a seamless substitute for the discontinued FH26040AC. With an interrupting capacity of 65kA at 480VAC, the breaker delivers exceptional fault clearing and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | BJA260402 |
| Series | BJA |
| Amperage | 40A |
| 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, Padlock Attachment, Rotary Handle |
|---|---|
| Accessories | Load Side Lugs Included |
| 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, Current Limiting, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
8 answersWhat panelboards accept the BJA260402 breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features the I-Line plug-in mounting style and cannot be used in standard load centers or QO and Homeline panels.
Can I use this 2-pole breaker in a 3-phase I-Line panelboard?
Yes, 2-pole I-Line breakers can be installed in 3-phase I-Line panelboards. They will connect to two of the three available phases on the bus stack. Ensure your load requires a 2-pole configuration and balance your panel phases accordingly.
What wire sizes and materials are supported by the lugs on this breaker?
The factory-installed lugs accept 14 AWG to 2/0 AWG wire. They are dual-rated for both aluminum and copper conductors, making them versatile for various field wiring requirements.
Does this breaker require a separate mounting bracket for installation?
No. As an I-Line plug-in breaker, it mounts directly onto the I-Line bus stack inside the panelboard. The plug-on jaw connection secures it to the bus without additional mounting hardware.
Can this PowerPacT B-frame breaker be used in DC applications?
Yes, it is rated for up to 250V DC with an interrupting capacity of 50kA. Ensure your specific DC system parameters align with the fixed thermal magnetic trip characteristics.
Are the thermal and magnetic trip settings adjustable on this model?
No, the BJA260402 features a fixed thermal and fixed magnetic trip unit. It provides standard Long-Time (L) and Instantaneous (I) protection without adjustable dials.
Is the BJA260402 a suitable replacement for legacy Square D F-frame breakers?
The PowerPacT B-frame series is the modern replacement for legacy F-frame breakers, such as the FA or FH series. When upgrading an older I-Line panel, verify the physical space requirements, as the B-frame dimensions differ slightly from the older F-frame models.
What does the 65kA at 480V interrupting rating indicate for panel safety?
This rating means the breaker can safely clear a fault current up to 65,000 amps at 480V AC without sustaining catastrophic damage. Always verify that the available fault current at your installation point does not exceed this value to maintain code compliance and safety.
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Reviews
Review summary
Customers rate this product 4.3 out of 5 based on 3 reviews.
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Rating
3 reviews
- RHRyan H.Verified BuyerReviewingSchneider Electric BJA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/25Breaker
It was as described and worked as it should.
- LOLake O.ReviewingSchneider Electric BJA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars10/7/21Staff was very helpful.
Staff was very helpful.
- RKRobert K.ReviewingSquare D BJA36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars1/26/21Breakers
Always fast service. Get my breakers the next day.