Square D EJB34030SA Miniature Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Quantity
Square D EJB34030SA - 30A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Providing remote tripping capabilities, this 30A E-frame unit features a factory-installed shunt trip. It delivers essential thermal-magnetic protection for complex commercial electrical systems requiring automated control. Designed specifically for Square D NF panelboards, the bolt-on mounting ensures a stable connection. Standard aluminum lugs are included for secure wire termination. With an impressive 100 kAIC rating at 240V, it safely clears severe faults to minimize facility downtime.Specifications
| Brand | Square D |
|---|---|
| Part Number | EJB34030SA |
| Series | EJB |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 120VAC, 100kA @ 240VAC, 65kA @ 480Y/277VAC |
| Frame Type | E |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D NF Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 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 | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Aluminum Lugs Included, Shunt Trip (Factory Installed) |
| 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
7 answersCan I install the EJB34030SA in an I-Line or NQ panelboard?
No, this E-frame breaker is designed exclusively for Square D NF series panelboards. It will not fit I-Line or NQ panels, which require different breaker frame types.
What does the SA suffix mean on the EJB34030SA catalog number?
The SA suffix indicates that this breaker includes a factory-installed 120VAC shunt trip accessory. This allows the breaker to be tripped remotely for emergency shutdowns or automated control systems.
Does the factory-installed shunt trip require additional space in the NF panelboard?
Yes. While a standard 3-pole E-frame breaker requires three spaces, the EJB34030SA requires four spaces in the panelboard to accommodate the integrated shunt trip mechanism.
Can I field-install a shunt trip on a standard EJB34030 breaker instead of buying the EJB34030SA?
No. For Square D E-frame breakers, shunt trips are factory-installed only and cannot be added in the field. You must purchase the breaker with the SA suffix if a 120VAC shunt trip is required.
Can the EJB34030SA be used on a 480V Delta system?
No, this breaker is rated for 480Y/277VAC solid-grounded wye systems only. It is not suitable for 480V ungrounded or corner-grounded delta systems due to its slash voltage rating.
Are the trip settings on the EJB34030SA adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time overload protection and the instantaneous short circuit protection are factory set and cannot be adjusted in the field.
How does the thermal-magnetic trip unit in the EJB34030SA operate?
The thermal-magnetic trip unit provides two types of protection: a thermal mechanism for delayed tripping against sustained overloads, and a magnetic mechanism that trips instantaneously to clear severe short circuits.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 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.