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Square D EGB34100 Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
EGB34100
Miniature Circuit Breaker
Brand
Square D
SKU
EGB34100
Quantity
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Square D EGB34100 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D EGB34100 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | EGB34100 |
| Series | EGB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 35kA @ 480Y/277VAC |
| Frame Type | EGB |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, cULus, HACR, NOM, RoHS, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
Quantity
Square D EGB34100 - 100A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | EGB34100-R |
| Series | EGB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 35kA @ 480Y/277VAC |
| Frame Type | EGB |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, cULus, HACR, NOM, RoHS, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
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Description
Built for commercial and industrial power distribution, the Square D EGB34100 is a 3-pole, 100A miniature circuit breaker from the E-Frame series. It provides robust thermal-magnetic protection and features the signature Visi-Trip indicator for rapid fault identification. This bolt-on breaker installs into Square D NF panelboards and accepts 14-2/0 AWG copper or 12-2/0 AWG aluminum wiring. Rated at 35 kAIC at 480Y/277VAC and 65 kAIC at 240VAC, it is fully HACR rated for HVAC applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | EGB34100 |
| Series | EGB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 35kA @ 480Y/277VAC |
| Frame Type | EGB |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, cULus, HACR, NOM, RoHS, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat panelboards are compatible with the EGB34100 breaker?
This bolt-on breaker is designed exclusively for Square D NF series panelboards. It will not fit in NQ, I-Line, or QO load centers.
How does the EGB34100 differ from the EDB34100 or EJB34100?
These E-frame breakers share the exact same physical dimensions and fit the same NF panelboards. The difference is their short circuit interrupting rating at 480Y/277VAC. The EDB34100 is rated at 18 kA, the EGB34100 is rated at 35 kA, and the EJB34100 is rated at 65 kA.
Can the EGB34100 be installed on a 480V ungrounded Delta system?
No. Because this breaker carries a slash voltage rating of 480Y/277VAC, it is only listed for use on solidly grounded wye systems where the line-to-ground voltage does not exceed 277VAC. It violates code to install it on ungrounded, corner-grounded, or impedance-grounded 480V Delta configurations.
What wire sizes do the factory lugs on the EGB34100 accept?
The standard mechanical lugs are rated for both copper and aluminum conductors. They accept copper wire from 14 AWG to 2/0 AWG, and aluminum wire from 12 AWG to 2/0 AWG.
Are the trip functions on the EGB34100 adjustable?
No. The thermal magnetic trip unit features fixed thermal (long-time) and fixed magnetic (instantaneous) trip thresholds. These settings cannot be adjusted in the field.
How does this breaker connect to the panelboard bus?
The EGB34100 is a bolt-on branch breaker. It secures directly to the interior bus of an NF panelboard using its integrated mounting screws.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 25 reviews.
Total 5 star reviews: 23 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
25 reviews
- RSRobert S.Verified BuyerReviewingSquare D EGB34015 - 15A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars4/21/26New breaker
Great product, exactly what I needed and shipped in a timely manner!
- EBEd B.Verified BuyerReviewingSquare D EGB34100 - 100A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/5/25100 amp breaker
Prompt ordering and shipping at a fair price. Thanks
- EBEd B.Verified BuyerReviewingSquare D EGB34015 - 15A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/11/25Breaker purchase
quick response and shipping
- TITim I.Verified BuyerReviewingSquare D EGB34040 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/6/25Problem Solved
The breakers showed up packaged very well and in great shape. The pricing was very competitive and solved our problem sourcing older circuit breakers.
- MKMarvin K.Verified BuyerReviewingSquare D EGB34045 - 45A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Square D EGB34045 3 Pole Circuit Breaker
Breaker and service was great and always has been. Looking forward more business in the future. Thanks.