Free Shipping Over $99
Federal Pacific NB111045 Miniature Circuit Breaker
- 45A
- 1 Pole
- Bolt-On
Federal Pacific
NB111045
Miniature Circuit Breaker
Brand
Federal Pacific
SKU
NB111045
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Federal Pacific NB111045 - 45A 1 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Federal Pacific NB111045 - 45A 1 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111045 |
| Series | NB |
| Amperage | 45A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Sold out
Quantity
Federal Pacific NB111045 - 45A 1 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111045-R |
| Series | NB |
| Amperage | 45A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Similar Items
10A 1 Pole Miniature Circuit Breaker
45A 2 Pole Miniature Circuit Breaker
Description
A drop-in replacement for aging Federal Pacific NB panelboards, this 45-amp single-pole breaker provides reliable thermal-magnetic protection for commercial and industrial applications. Designed to match original factory specifications, it ensures a secure bolt-on connection without the need for aftermarket adapters or modifications. Rated at 10kAIC at 120VAC, the NB111045 handles standard overcurrent and short-circuit faults. It serves as an exact match for the UBIF045NB substitute.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111045 |
| Series | NB |
| Amperage | 45A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NB Panelboards |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhich panelboards accept the Federal Pacific NB111045 breaker?
This breaker is engineered specifically for Federal Pacific NB series commercial panelboards. Because it utilizes a bolt-on mounting configuration, it cannot be installed in standard Federal Pacific Stab-Lok residential load centers that require plug-on connections.
What is the direct cross-reference for the NB111045?
The UBIF045NB is the exact modern substitute for this breaker. It matches the physical dimensions, bolt-on mounting style, and thermal-magnetic trip characteristics required for Federal Pacific NB panelboards.
What wire gauge range is supported by the terminals on the NB111045?
The load-side lugs accept both aluminum and copper conductors ranging from 14 AWG up to 2 AWG. Ensure the wiring is properly sized for the 45-amp circuit and torqued to the manufacturer specifications during installation.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides two specific levels of protection. The 'L' stands for long-time delay, which handles sustained overcurrents, while the 'I' represents the instantaneous trip function designed to clear short circuits immediately.
Does the NB111045 offer AFCI or GFCI protection?
No, this is a standard thermal-magnetic miniature circuit breaker. It provides essential overload and short-circuit protection but does not include integrated arc fault or ground fault circuitry.
Can the NB111045 be used in place of an NC or NA series breaker?
No. The NB111045 features a bolt-on connection for commercial NB panelboards. It is not interchangeable with NC or NA series breakers, which utilize a plug-on Stab-Lok design for residential load centers.
Is the trip unit on the NB111045 adjustable?
No, the thermal-magnetic trip unit on this miniature circuit breaker is fixed. The long-time and instantaneous trip thresholds are factory calibrated for 45 amps and cannot be modified in the field.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
Search
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.