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Siemens NEB3B025B Molded Case Circuit Breaker
- 25A
- 3 Pole
- Bolt-On
Siemens
NEB3B025B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NEB3B025B
Quantity
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Siemens NEB3B025B - 25A 3 Pole Molded Case Circuit Breaker
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Description
Operating at 25 amps, this Sentron frame molded case circuit breaker is engineered for reliable commercial power management. It features a trip-free mechanism and carries HACR and HID ratings, making it highly versatile for specialized lighting and HVAC loads. Installation is straightforward within Siemens P1, P2, P3, P4, and P5 panelboards via a secure bolt-on connection. For legacy replacements, it transitions to the 3VA5125-5EC31-0AA0 when paired with the proper mounting hardware.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEB3B025B |
| Series | NEB |
| Amperage | 25A |
| 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 | 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
7 answersWhich Siemens panelboards are compatible with the NEB3B025B circuit breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, P3, P4, and P5 panelboards. Depending on the specific panelboard generation, a separate mounting hardware kit may be required for installation.
What wire sizes are accepted by the lugs on the NEB3B025B?
The factory-installed lugs accept copper or aluminum wire ranging from 14 AWG to 1/0 AWG.
Can the NEB3B025B be used in direct current (DC) systems?
Yes, this thermal-magnetic breaker is rated for use in DC applications up to 250VDC, providing an interrupting capacity of 35kA.
What is the difference between Siemens NEB and HEB frame circuit breakers?
Both share the same physical dimensions and mounting requirements, but the HEB frame offers a higher interrupting capacity than the standard NEB frame.
Are the trip settings adjustable on the NEB3B025B?
No, this breaker features a fixed thermal and fixed magnetic trip unit. It provides long-time and instantaneous (LI) protection that cannot be field-adjusted.
What is the modern replacement for the legacy NEB3B025B breaker?
For panelboard upgrades, Siemens transitions this legacy Sentron frame to the newer 3VA series. Specifically, it crosses to the 3VA5125-5EC31-0AA0, though a new mounting strap kit will be required to fit existing panels.
Is the NEB3B025B suitable for HVAC and specialized lighting loads?
Yes, this breaker carries both HACR (Heating, Air Conditioning, and Refrigeration) and HID (High-Intensity Discharge) ratings, making it suitable for commercial HVAC equipment and specialized lighting circuits.
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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.