Square D EJB34100SA Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Square D EJB34100SA - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Engineered for commercial applications, this 100-amp E-Frame breaker includes a factory-installed shunt trip for remote operation. It provides reliable thermal-magnetic protection for demanding electrical systems. Designed for Square D NF panelboards, the bolt-on mounting ensures a secure busbar connection. It accepts 14-2/0 AWG copper or 12-2/0 AWG aluminum conductors. Delivering 65kAIC at 480Y/277V, this three-phase unit features a Visi-Trip indicator for rapid fault identification.Specifications
| Brand | Square D |
|---|---|
| Part Number | EJB34100SA |
| Series | EJB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 277VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 120VAC, 100kA @ 240VAC, 65kA @ 277VAC, 65kA @ 480Y/277VAC |
| 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 Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, cULus, HACR, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhich panelboards accept the EJB34100SA circuit breaker?
This E-Frame breaker is specifically designed for bolt-on installation in Square D NF series panelboards. It is not compatible with NQ or I-Line panelboards.
How many panelboard spaces does the EJB34100SA require?
Although it is a 3-pole breaker, the factory-installed shunt trip requires an additional pole space. Therefore, the EJB34100SA requires four pole spaces in a Square D NF panelboard.
What does the "SA" suffix indicate on the EJB34100SA catalog number?
The "SA" suffix means the breaker comes with a factory-installed 120V AC shunt trip. This accessory allows the breaker to be tripped remotely for emergency power-off (EPO) or control system shutdowns.
Can I add a shunt trip to a standard EJB34100 breaker in the field?
No. Square D E-Frame shunt trips are factory-installed only and cannot be added in the field. You must order the EJB34100SA if your application requires a 120V shunt trip.
Can the EJB34100SA be used in 480V Delta systems?
No. The EJB34100SA is slash-rated for 480Y/277VAC solidly grounded wye systems. It is not rated for ungrounded or corner-grounded 480V Delta systems where the line-to-ground voltage exceeds 277V.
What is the purpose of the shunt trip on the EJB34100SA?
The 120V AC shunt trip allows the breaker to be opened remotely via an external control signal. This is commonly used for emergency power-off (EPO) systems, fire alarm integration, or automated safety shutdowns.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 13 reviews.
- JMJessica M.Verified BuyerReviewingSquare D EJB34060 - 60A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/16/26Exactly what we needed
Purchased the Square D EJB34060 60A 3-Pole circuit breaker for a commercial electrical application. The breaker arrived as described, was well packaged, and was the correct Square D part we needed.
Electrical components like this can sometimes be difficult to locate, so it was great to find the exact breaker without having to substitute or modify the existing equipment. Installation went smoothly and the breaker fit and operated as expected.
Very satisfied with the purchase and would order again when we need hard-to-find Square D electrical equipment.
- 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.