Federal Pacific NB90 Molded Case Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NB90 - 90A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Federal Pacific NB90 - 90A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB90 |
| Series | NB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NBLP, NBC, NBDP, CDP 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 Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Quantity
Federal Pacific NB90 - 90A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB90-R |
| Series | NB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NBLP, NBC, NBDP, CDP 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 Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Description
Serving older facilities, the Federal Pacific NB90 offers robust long-time and instantaneous trip capabilities. This two-pole, 90-amp breaker is optimized for commercial environments. It fastens securely into legacy NBLP, NBC, NBDP, and CDP panelboards. The UBIF290NB is recognized as a modern substitute for this bolt-on frame. With a 10kA interrupting rating at 120/240VAC, it utilizes fixed thermal and magnetic settings to ensure consistent performance.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NB90 |
| Series | NB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NBLP, NBC, NBDP, CDP 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 Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Product FAQs
6 answersWhich Federal Pacific panelboards are compatible with the NB90 circuit breaker?
The NB90 is designed for bolt-on installation in legacy Federal Pacific NBLP, NBC, NBDP, and CDP panelboards.
Is there a modern replacement available for the Federal Pacific NB90?
Yes, the Connecticut Electric UBI series offers a direct replacement for this breaker. The modern cross-reference for the 2-pole 90-amp NB frame is the UBIF290NB.
What wire sizes are accepted by the terminals on the NB90?
The factory lugs on the NB90 accept aluminum or copper conductors ranging from 4 AWG to 1/0 AWG.
Can I use the NB90 in place of a Federal Pacific NA90 breaker?
No. The NB90 is a bolt-on molded case circuit breaker, whereas the NA series features a plug-on mounting style. They are not interchangeable and fit different panelboard designs.
What type of trip unit is equipped on the NB90?
This breaker features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) trip functions to protect against overloads and short circuits.
Is the Federal Pacific NB90 considered a Stab-Lok breaker?
No. The NB series consists of bolt-on molded case circuit breakers typically used in commercial applications, which are distinct from the residential Stab-Lok (NA and NC series) plug-on breakers.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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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.