Federal Pacific NB90H Miniature Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NB90H - 90A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Designed specifically for commercial and industrial applications, this 90A bolt-on component integrates seamlessly into Federal Pacific NB panelboards. Facility managers rely on this exact match to maintain existing infrastructure without requiring extensive panel upgrades or modifications. Featuring a 22kAIC interrupting capacity at 120/240VAC, it provides robust thermal-magnetic defense against overloads and short circuits. It can also be substituted with the UBIF290NB model if needed.Specifications
| Brand | Federal Pacific |
|---|---|
| Series | NB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards |
| Wire Gauge | 4-1/0 AWG (Al/Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity |
Product FAQs
6 answersWhat panelboards accept the Federal Pacific NB90H?
The NB90H is designed for installation in Federal Pacific NB, NBLP, NBC, NBDP, and CDP series panelboards. It features a bolt-on connection and is not compatible with Federal Pacific Stab-Lok load centers.
What does the "H" signify in the NB90H catalog number?
The "H" indicates a high-interrupting capacity. While standard Federal Pacific NB breakers are typically rated for 10kAIC, the NB90H is rated to safely interrupt fault currents up to 22kAIC at 240VAC.
Are there modern replacements for the Federal Pacific NB90H?
Yes, Connecticut Electric manufactures aftermarket replacement breakers for Federal Pacific NB panelboards under their UBIF series. These provide a modern alternative for aging FPE infrastructure.
How is the NB90H secured to the panelboard?
This breaker uses a bolt-on mounting configuration. It fastens directly to the panelboard busbar, providing a secure, vibration-resistant connection that is required in many commercial and industrial applications.
Does the NB90H use the Stab-Lok connection design?
No, the NB90H is a commercial-grade bolt-on circuit breaker. It does not use the Stab-Lok plug-on design found in Federal Pacific NA and NC series residential breakers.
What type of protection does the NB90H provide?
It features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. The thermal element handles standard overloads, while the magnetic element provides immediate tripping during severe short circuits.
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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.