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Siemens NEB3B125B Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Siemens
NEB3B125B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NEB3B125B
Quantity
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Siemens NEB3B125B - 125A 3 Pole Molded Case Circuit Breaker
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Siemens NEB3B125B - 125A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Siemens |
|---|---|
| Part Number | NEB3B125B |
| Series | NEB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3, P4, P5 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| 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, Trip-Free Mechanism |
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Siemens NEB3B125B - 125A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Siemens |
|---|---|
| Series | NEB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3, P4, P5 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| 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, Trip-Free Mechanism |
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Description
Built for commercial power distribution, this 125A, 3-pole MCCB provides reliable thermal-magnetic protection. It features a trip-free mechanism with long-time and instantaneous functions. This bolt-on breaker installs into Siemens P1 through P5 panelboards. It is officially replaced by the 3VA5112-5EC31-0AA0, which requires a panelboard mounting kit for installation. Capable of reverse feed, it offers a 35kA interrupting rating at 480V. The HACR-rated unit includes load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEB3B125B |
| Series | NEB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 35kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3, P4, P5 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| 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, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards accept the NEB3B125B breaker?
This breaker is compatible with Siemens P1, P2, P3, P4, and P5 panelboards. It mounts directly to the bus using a bolt-on connection.
What are the acceptable wire sizes for the lugs on this breaker?
The factory-installed lugs are rated to accept 6 AWG to 3/0 AWG copper or aluminum conductors.
Is the NEB3B125B suitable for direct current applications?
This breaker is rated for use in DC circuits up to 250V DC, providing an interrupting capacity of 35kA.
Are the thermal and magnetic trip settings adjustable on the NEB3B125B?
No, both the thermal and magnetic trip functions are fixed and cannot be adjusted in the field.
What does the LI designation mean for this breaker's trip unit?
The LI designation indicates a thermal-magnetic trip unit that provides fixed long-time protection for overloads and fixed instantaneous protection for short circuits.
What frame family does the NEB3B125B belong to?
It is part of the Siemens SENTRON NEB/HEB frame group, which is commonly used in commercial and industrial power distribution panels.
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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.