Eaton / Cutler-Hammer NB3500P Molded Case Circuit Breaker
- 500A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer NB3500P - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty industrial applications, the Eaton NB3500P is a 500A, 3-pole current-limiting molded case circuit breaker. It provides robust power distribution for demanding electrical systems. This unit-mount MCCB is designed to fit Westinghouse Pow-R-Line 4B panelboards and switchboards, serving as a reliable replacement component. Featuring thermal-magnetic trip technology, it boasts a 200kAIC rating at 600VAC. Its current-limiting design protects downstream equipment.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | NB3500P-R |
| Series | NB |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 200kA @ 600VAC, 100kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Pow-R-Line 4B Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | 500NBP12 Current Limiters |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused, High Interrupting Capacity |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
6 answersWhich panelboards are compatible with the NB3500P circuit breaker?
This unit mount breaker is designed for installation in legacy Westinghouse Pow-R-Line 4B panelboards and switchboards.
Is the Eaton NB3500P identical to the Westinghouse NB3500P?
Yes. Eaton acquired the Westinghouse distribution equipment business, so Cutler-Hammer, Eaton, and Westinghouse NB-frame breakers with the same catalog number are physically and electrically identical.
What type of terminal connections are provided on this breaker?
The NB3500P includes standard pressure copper lugs on both the line and load sides.
How does the trip unit operate on the NB3500P?
It features a thermal-magnetic trip unit with fixed thermal (long-time) and adjustable magnetic (instantaneous) settings to allow for precise short-circuit coordination.
What are the physical dimensions of the NB3500P frame?
This fused current limiting breaker measures 8.25 inches wide, 5.5 inches deep, and 22 inches high. Ensure your enclosure has adequate depth and clearance for this extended footprint.
How does the fused current limiting design impact the fault rating?
The integrated fuses allow this molded case breaker to achieve an exceptionally high interrupting capacity of 200kA at 600VAC, protecting downstream equipment from massive fault currents.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
- MMMike M.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/2/26100amp federal pacific breaker
So far the breaker works as expected
Just good to know some of these old federal are still available.
Thank you
- SGscott g.Verified BuyerReviewingFederal Pacific NB111020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/26Hard to find breakers
Had a project at a school built in the 1960’s and thought we were up a creek when confronted with ancient FPE commercial panels. Luckily we found what we needed with Suoerbreakers.
- BFBarry F.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/13/26Hard to find circuit breaker
Item was as described.
- WWWilliam W.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/9/26Exactly what I needed.
Awesome! Packaging and delivery were good. Bolted in and worked perfectly!!)
- GHGary H.Verified BuyerReviewingFederal Pacific NB125 - 125A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/26Federal Pacific NB125 2 Pole Circuit Breaker
Federal Pacific NB125 2 Pole Circuit Breaker
Great product and excellent price and warranty.