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Square D EJB24125 Miniature Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Square D
EJB24125
Miniature Circuit Breaker
Brand
Square D
SKU
EJB24125
Quantity
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Square D EJB24125 - 125A 2 Pole Miniature Circuit Breaker
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Description
Designed to protect high-capacity branch circuits, the Square D EJB24125 is a 2-pole, 125A miniature circuit breaker. The E-Frame construction ensures durability in commercial and industrial environments. It installs into Square D NF panelboards via a sturdy bolt-on connection, accommodating 14-2/0 AWG copper or 12-2/0 AWG aluminum wire. With an interrupting rating of 100kAIC at 240VAC and 65kAIC at 480Y/277VAC, it provides superior safety. Equipped with a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | EJB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 120VAC, 100kA @ 240VAC, 65kA @ 480Y/277VAC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D NF Panelboards |
| Wire Gauge | 14-2/0 AWG (Cu), 12-2/0 AWG (Al) |
| Max Wire | 2/0 AWG |
| Min Wire | 14 AWG (Cu) / 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Aluminum Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, cULus, HACR, HID, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
Product FAQs
5 answersWhat panelboards are compatible with the EJB24125 circuit breaker?
This bolt-on breaker is designed specifically for use in Square D NF series panelboards. It mounts directly to the panel bus using a bolted connection.
Can the EJB24125 replace an EDB24125 or EGB24125?
Yes. The EJB24125 shares the same physical dimensions and mounting style as the EDB and EGB versions. It offers a higher interrupting rating of 65kA at 480Y/277VAC, making it a safe and compliant upgrade for systems requiring higher fault current protection.
What does the EJB designation indicate compared to other E-frame breakers?
In the Square D E-frame family, the third letter indicates the interrupting capacity. The J in EJB signifies the highest tier, providing a 65kAIC rating at 480Y/277VAC. For comparison, EDB provides 18kAIC and EGB provides 35kAIC at the same voltage.
What wire sizes are accepted by the terminals on this breaker?
The factory-installed lugs accept 14 to 2/0 AWG copper wire or 12 to 2/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation as outlined by Schneider Electric.
How many spaces does this breaker occupy in an NF panelboard?
As a 2-pole E-frame breaker, it requires two standard pole spaces in a Square D NF panelboard.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 12 reviews.
Total 5 star reviews: 11 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
12 reviews
- EOEric O.Verified BuyerReviewingSquare D EJB14040 - 40A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26Breaker Replacement
I needed a replacement breaker fast, and SuperBreakers pulled it off for me without any issues.
- BBBrad B.Verified BuyerReviewingSquare D EJB34125 - 125A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/27/26Breaker Order
Thanks! Ordering was easy and the part was delivered quickly and accurately. All I can ask for!
- RRRodolfo R.Verified BuyerReviewingSquare D EJB34015 - 15A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/14/26Satisfied Customer
The breaker was received in good condition and it works good. Lead time was not long it all.
Very happy with SuperBreakers Rep. Good customer service.
- RNRandy N.Verified BuyerReviewingSquare D EJB34070 - 70A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/14/25Breaker value
saved a lot compared to what the electrician wanted to charge us, at least half the price.
- TWTimothy W.Verified BuyerReviewingSquare D EJB34020 - 20A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/15/25Circuit Breaker
Product arrived in a timely matter and met expectations to repair the problem that we had.