Eaton / Cutler-Hammer NB3800PR Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer NB3800PR - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding commercial environments, the Eaton NB3800PR is a 3-pole, 800A MCCB. It is equipped with a thermal magnetic trip unit offering fixed thermal and adjustable magnetic responses for precise LI overcurrent protection. Designed for unit-mount installations, this breaker fits into Westinghouse Pow-R-Line 4B panelboards. It acts as a replacement for the NB3800P. Boasting a 200kAIC rating at 480VAC, it incorporates fused current-limiting capabilities to clear high-level faults.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | NB3800PR |
| Series | NB |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 200kA @ 600VAC, 100kA @ 250VDC |
| Frame Type | NB |
|---|---|
| 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 | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused, High Interrupting Capacity |
| Special Features | Integrally Fused |
Product FAQs
8 answersWhat panelboards are compatible with the Eaton NB3800PR circuit breaker?
The NB3800PR is designed for use in Westinghouse Pow-R-Line 4B panelboards and compatible switchboards.
Is the NB3800PR a complete breaker or just the frame?
The NB3800PR catalog number represents a complete Tri-Pac fused molded case circuit breaker. It includes the NB frame, an 800A thermal-magnetic trip unit, and current-limiting fuses.
What is the difference between the NB3800PR and the NB3800PF?
The NB3800PR is a fully assembled breaker that includes the 800A trip unit and fuses. The NB3800PF refers to the breaker frame only, requiring a separate trip unit to be installed.
What does the Tri-Pac designation mean for the NB3800PR?
Tri-Pac indicates that this is a fused molded case circuit breaker. It integrates standard thermal-magnetic trip functions with current-limiting fuses to provide high interrupting capacity, up to 200kA at 480VAC.
How does the NB3800PR mount into a panelboard?
This breaker features a bolt-on connection type and is designed for unit mount installation within compatible panelboards and switchboards.
Can the NB3800PR be used in DC applications?
Yes, this breaker is rated for DC applications with a maximum voltage of 250VDC and an interrupting capacity of 100kA at that voltage.
Is the Eaton NB3800PR the same as the Westinghouse NB3800PR?
Yes. The NB3800PR was originally manufactured by Westinghouse. Eaton acquired the Westinghouse distribution equipment business and continued producing these breakers under the Cutler-Hammer and Eaton brands.
Are the trip settings on the NB3800PR adjustable?
The NB3800PR features a thermal-magnetic trip unit with a fixed thermal setting for long-time protection and an adjustable magnetic setting for instantaneous short-circuit protection.
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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.