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Siemens NEB3B040B Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Siemens
NEB3B040B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NEB3B040B
Quantity
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Siemens NEB3B040B - 40A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial power distribution, the Siemens NEB3B040B is a 3-pole, 40A molded case circuit breaker. It provides reliable thermal-magnetic protection with long-time and instantaneous trip functions. This breaker mounts into Siemens P1, P2, and P3 panelboards using a secure bolt-on connection. For modern upgrades, this NEB frame is replaced by the 3VA4140-6ED34-0AA0 (requires a 3VA41 mounting kit). Rated for 35kAIC at 480VAC, it includes load side lugs and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEB3B040B |
| Series | NEB |
| Amperage | 40A |
| 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 Panelboards |
| Wire Gauge | 8-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs |
| 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, Non-Interchangeable Trip |
Product FAQs
7 answersWhich Siemens panelboards accept the NEB3B040B breaker?
This breaker is engineered for commercial power distribution and mounts directly into Siemens Sentron P1, P2, and P3 panelboards using a secure bolt-on connection.
Are the load-side lugs included with the NEB3B040B?
Yes, the breaker comes factory-equipped with load-side lugs that accommodate 8 AWG through 1/0 AWG copper or aluminum wiring. The line side bolts directly to the panelboard bus.
Will this breaker replace an older ITE NEB3B040B?
Yes. Siemens acquired ITE, and this current-production Siemens breaker is a direct, drop-in replacement for legacy ITE and Siemens-Allis breakers with the exact same catalog number.
What is the difference between Siemens NEB and HEB circuit breakers?
Both are part of the same frame group and share identical physical dimensions for P1, P2, and P3 panelboards. The difference lies in the short-circuit rating, with the HEB frame offering a higher interrupting capacity than the standard NEB frame.
Can the NEB3B040B be utilized in DC power applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is fully rated for direct current systems up to 250VDC with a 35kA interrupting capacity.
Does this breaker offer adjustable trip settings?
No, the NEB3B040B features a non-interchangeable trip unit with fixed thermal and fixed magnetic settings for its long-time and instantaneous (LI) protection functions.
Is the NEB3B040B rated for HVAC or lighting applications?
Yes, this breaker is HACR rated for use with heating, air conditioning, and refrigeration equipment, as well as HID rated for high-intensity discharge 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.