Eaton / Westinghouse NB3800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Bolt-On
Quantity
Eaton / Westinghouse NB3800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Restoring older industrial infrastructure requires exact-fit components like the Eaton NB3800. This 800-amp, three-pole molded case circuit breaker delivers reliable long-time and instantaneous protection for commercial applications. It mounts into legacy Westinghouse PRL4 panelboards and switchboards without requiring retrofit kits. Facility managers can use this unit to replace aging NB3800 or HNB3800 models while maintaining original equipment specifications.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | NB3800-R |
| Series | NB |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse PRL4 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 | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
7 answersWhat equipment is the NB3800 designed to fit?
This legacy bolt-on breaker is engineered for direct installation into older Westinghouse PRL4 panelboards and switchboards. It allows facilities to replace aging NB3800 or HNB3800 models without requiring retrofit kits.
Can the NB3800 replace an HNB3800 circuit breaker?
Yes, the NB3800 shares the same physical dimensions and mounting footprint as the HNB3800. However, the HNB3800 has a higher interrupting capacity. Ensure the lower AIC rating of the NB3800 meets your facility fault current requirements before substituting.
Does the NB3800 feature an interchangeable trip unit?
Yes, the NB3800 features an interchangeable thermal-magnetic trip unit. This allows panel builders to swap the trip unit if different protection parameters are required, without replacing the entire breaker frame.
Is the magnetic trip setting adjustable on the NB3800?
Yes, while the thermal element provides fixed long-time protection, the magnetic instantaneous trip is adjustable. This allows licensed electricians to fine-tune the short-circuit response to coordinate with other protective devices in the electrical system.
What safety standards does the NB3800 meet?
This breaker is UL listed and conforms to NEMA AB-1 and UL 489 standards for molded case circuit breakers, ensuring reliable overcurrent and short-circuit protection in commercial and industrial environments.
Are load side lugs included with the NB3800?
Yes, the NB3800 comes complete with load side lug terminals for standard wire connections. Always verify wire size compatibility and torque specifications before installation.
What frame size is the NB3800?
The NB3800 is built on the legacy Westinghouse NB frame, which typically accommodates 700A to 1200A applications.
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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.