Federal Pacific NB231090 Miniature Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Federal Pacific
NB231090
Miniature Circuit Breaker
Brand
Federal Pacific
SKU
NB231090
Quantity
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Federal Pacific NB231090 - 90A 3 Pole Miniature Circuit Breaker
New
Quantity
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Federal Pacific NB231090 - 90A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB231090 |
| Series | NB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards, NBLP 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 |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Sold out
Quantity
Federal Pacific NB231090 - 90A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB231090-R |
| Series | NB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards, NBLP 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 |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
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Description
Restoring power to older commercial facilities is simple with the Federal Pacific NB231090. This 3-pole, 90A miniature circuit breaker delivers dependable thermal-magnetic protection for 240VAC systems. Designed to eliminate the need for retrofit kits, the bolt-on unit installs into legacy FPE NB and NBLP panelboards. It acts as an exact replacement for NB3P90 and UBIFP2390N substitute breakers. With a 10 kAIC interrupt rating, it provides fixed LI trip functions to defend branch circuits.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NB231090 |
| Series | NB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards, NBLP 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 |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
8 answersWhat panelboards are compatible with the NB231090 circuit breaker?
This breaker is designed exclusively for legacy Federal Pacific NB and NBLP series bolt-on panelboards. It will not fit in standard residential load centers.
Can I use this NB series breaker in a Federal Pacific Stab-Lok panel?
No. The NB231090 is a bolt-on circuit breaker and will not fit in Stab-Lok load centers that require plug-on NA or NC series breakers.
What size wire does the NB231090 accept?
The load side lug terminals accommodate 4 AWG to 1/0 AWG aluminum or copper wire, making it suitable for standard 90-amp feeder circuits.
How does the NB231090 mount into the panel?
It features a bolt-on mounting style, securing directly to the panelboard bus with screws. This provides a secure connection often required in commercial applications.
What type of trip unit is equipped on the NB231090?
It utilizes a non-interchangeable, fixed thermal-magnetic trip unit. This provides standard long-time overload protection and instantaneous short-circuit protection (LI functions).
Can the NB231090 be used on a 480V system?
No. This 3-pole breaker has a maximum voltage rating of 240V AC. It is not rated for 480V or 600V commercial systems.
Is the Federal Pacific NB231090 a Stab-Lok breaker?
No. While Federal Pacific is known for its residential Stab-Lok line, the NB series is a commercial-grade bolt-on breaker. It uses a completely different bus connection method than the plug-on Stab-Lok design.
Are Federal Pacific NB breakers still manufactured?
The original Federal Pacific Electric company is no longer in business, making the NB231090 a legacy component. Sourcing these specific breakers allows facilities to maintain existing NB and NBLP panelboards without a complete tear-out.
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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.
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Rating
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.