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Square D BDA24040Y4 Molded Case Circuit Breaker
- 40A
- 2 Pole
- I-Line
Square D
BDA24040Y4
Molded Case Circuit Breaker
Brand
Square D
SKU
BDA24040Y4
Quantity
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Square D BDA24040Y4 - 40A 2 Pole Molded Case Circuit Breaker
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Description
Delivering robust thermal-magnetic protection, the Square D BDA24040Y4 is a 2-pole, 40A molded case circuit breaker from the PowerPacT B-Frame series. It is engineered for demanding commercial and industrial applications requiring long-time and instantaneous (LI) trip functions. Designed for seamless integration, this unit mounts into Square D I-Line panelboards and replaces the legacy FA24040BC. It features a BC phase connection and delivers an 18 kAIC interrupting rating at 480Y/277V.Specifications
| Brand | Square D |
|---|---|
| Part Number | BDA24040Y4 |
| Series | BDA |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 208Y/120VAC, 25kA @ 240VAC, 18kA @ 480Y/277VAC, 18kA @ 480VAC, 14kA @ 600Y/347VAC, 10kA @ 250VDC |
| Frame Type | BDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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 | None 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, Phase Connection BC |
Product FAQs
7 answersWhat is the direct replacement for the legacy Square D FA24040BC?
The Square D BDA24040Y4 is the direct replacement for the legacy FA24040BC circuit breaker. It provides the same 40A rating, 2-pole configuration, and BC phase connection for I-Line panelboards.
What does the Y4 suffix indicate on the BDA24040Y4 catalog number?
In the PowerPacT B-Frame nomenclature, the Y4 suffix indicates that the breaker is configured with a BC phase connection for installation onto the I-Line bus.
Is the BDA24040Y4 compatible with standard unit-mount applications?
No, the BDA24040Y4 is built with an I-Line style plug-in connection on the line side. It is specifically designed for mounting in Square D I-Line panelboards and switchboards, not for unit-mount or DIN rail applications.
Can the BDA24040Y4 be applied on DC voltage systems?
Yes, in addition to its AC voltage ratings, this thermal magnetic breaker is rated for use on 250VDC systems with an interrupting capacity of 10kA.
What wire sizes are accepted by the load lugs on this 40A breaker?
The factory-installed mechanical load lugs accept wire sizes ranging from 14 AWG to 2/0 AWG. The lugs are rated for both aluminum and copper (Al/Cu) conductors.
What type of trip protection does the BDA24040Y4 provide?
This breaker is equipped with a fixed thermal magnetic trip unit that provides Long-Time and Instantaneous (LI) protection against overloads and short circuits. It also features dual-break rotating contacts to reduce peak current during a fault.
Does the BDA24040Y4 include a manual trip feature?
Yes, all PowerPacT B-Frame circuit breakers feature an integral push-to-trip button on the cover, allowing users to manually trip the breaker for testing and maintenance.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 9 reviews.
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Rating
9 reviews
- KFKevin F.Verified BuyerReviewingSquare D BDA36100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/2/26Good price, fast delivery
My local supplier was backordered one this item for a few months, Superbreakers beat the price and delivered it quickly.
- AGAlan G.Verified BuyerReviewingSquare D BDA36020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/10/26Excellent Value
Excellent Value and fast shipping. SuperBreakers delivered!!
- MMMike M.Verified BuyerReviewingSquare D BDA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/25/26Review
Super Breakers had the breakers I needed in stock at a fair price and shipped & delivered in an expedited fashion. They are my go-to guys for hard to find breakers.
Mike @ Frey Electric
- SMSergio M.Verified BuyerReviewingSquare D BDA36040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/19/26Installed & working
Ordered this from SuperBreakers when local vendors were quoting me 25%+.
So I got a refurbished version of this breaker.
It is installed and working.
Also, service was great.
Thank you SuperBreakers!
- GOGeorge O.ReviewingSquare D BDA36080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars8/18/22Just received it. Packaging was
Just received it. Packaging was good. Product seems to be exactly as described. Installing soon.