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Siemens NEB2B125B Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
NEB2B125B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NEB2B125B
Quantity
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Siemens NEB2B125B - 125A 2 Pole Molded Case Circuit Breaker
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Siemens NEB2B125B - 125A 2 Pole Molded Case Circuit Breaker
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| Brand | Siemens |
|---|---|
| Part Number | NEB2B125B-R |
| Series | NEB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 6-3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Load Side Lugs (TA1EG30) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Quantity
Siemens NEB2B125B - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Series | NEB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 6-3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Load Side Lugs (TA1EG30) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
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Description
Built for commercial applications, the Siemens NEB2B125B is a 2-pole, 125A molded case circuit breaker from the Sentron family. It features a thermal-magnetic trip unit with fixed LI protection. This bolt-on breaker installs into Siemens P1, P2, and P3 panelboards. For modern upgrades, it is replaced by the 3VA4112-6ED24-0AA0 model using a 3VA41 mounting kit. Rated for 35kAIC at 480VAC, it provides robust fault protection. The unit is HACR rated and includes load-side lugs.Specifications
| Brand | Siemens |
|---|---|
| Series | NEB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 6-3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch, Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Load Side Lugs (TA1EG30) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
5 answersWhat panelboards are compatible with the NEB2B125B circuit breaker?
This breaker is designed for installation in Siemens P1, P2, and P3 panelboards. Depending on the specific panel type, additional mounting hardware may be required to connect it to the busbar.
What mounting kit is needed to install this breaker in P2 or P3 panelboards?
When installing NEB or HEB frame breakers into Siemens P2 or P3 panelboards, you will typically need a branch strap kit, such as the BBKEB32, which allows for twin mounting of the breakers.
What is the difference between Siemens NEB and HEB circuit breakers?
Both NEB and HEB breakers share the same physical footprint within the Sentron frame family. The primary difference is the interrupting rating, with HEB models offering a higher maximum short-circuit capacity.
Are the trip settings on the NEB2B125B adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory-set and cannot be adjusted in the field.
How are conductors terminated on the NEB2B125B?
The line side of this breaker bolts directly to the panelboard bus. The load side is equipped with factory-installed lugs that accommodate 6 to 3/0 AWG copper or aluminum wire.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
3 reviews
- JLJeremy L.ReviewingSiemens NEB3B125B - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/17/18The right product with great
The right product with great packaging and shipping
- JLJeremy L.ReviewingSiemens NEB3B030B - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/26/17Great breaker. Best price and
Great breaker. Best price and fast service
- DBDan B.ReviewingSiemens NEB3B035B - 35A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/26/17Siemens NEB
Customer is happy.