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Siemens NEB3B050B Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Siemens
NEB3B050B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NEB3B050B
Quantity
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Siemens NEB3B050B - 50A 3 Pole Molded Case Circuit Breaker
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Siemens NEB3B050B - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | NEB3B050B |
| Series | NEB |
| Amperage | 50A |
| 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 |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side Lugs (TA1EG10) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, 40C Ambient Calibration |
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Siemens NEB3B050B - 50A 3 Pole Molded Case Circuit Breaker
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| Brand | Siemens |
|---|---|
| Series | NEB |
| Amperage | 50A |
| 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 |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side Lugs (TA1EG10) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, 40C Ambient Calibration |
Similar Items
Description
The NEB3B050B is a 3-pole, 50A MCCB from the Siemens SENTRON series. Built for commercial use, it features thermal-magnetic trip technology with fixed long-time and instantaneous protection. This NEB frame unit mounts into Siemens P1, P2, and P3 panelboards via a bolt-on connection. It is slated to be replaced by the 3VA4150-5ED34-0AA0 model. Rated for 35kAIC at 480VAC, it provides robust fault protection. The breaker is HACR and HID rated for specialized lighting and HVAC circuits.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEB3B050B |
| Series | NEB |
| Amperage | 50A |
| 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 |
| Frame Type | NEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side Lugs (TA1EG10) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, 40C Ambient Calibration |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the NEB3B050B?
This breaker is designed for bolt-on installation in Siemens P1, P2, and P3 panelboards. It mounts directly to the panelboard bus, providing a secure connection for commercial and industrial power distribution.
What wire sizes are accepted by the NEB3B050B lugs?
The factory-installed load lugs accept 14 AWG to 1/0 AWG copper or aluminum conductors. Always verify local codes and follow the manufacturer torque specifications during installation.
What does the LI trip function mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides both Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. Both the thermal and magnetic trip settings are fixed on this model.
Can the NEB3B050B be used in DC power systems?
Yes, in addition to standard AC networks, this breaker is certified for direct current applications up to 250VDC, where it provides a 35kAIC interrupting rating.
Is the NEB3B050B suitable for HVAC and lighting circuits?
Yes, this breaker is HACR rated for use with heating, air conditioning, and refrigeration equipment. It is also HID rated for high-intensity discharge lighting circuits.
What is the direct replacement for the Siemens NEB3B050B?
The NEB3B050B is slated to be replaced by the Siemens 3VA4150-5ED34-0AA0 molded case circuit breaker as part of the transition to the newer 3VA series.
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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.