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Federal Pacific NB111040 Molded Case Circuit Breaker
- 40A
- 1 Pole
- Bolt-On
Federal Pacific
NB111040
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NB111040
Quantity
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Federal Pacific NB111040 - 40A 1 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Federal Pacific NB111040 - 40A 1 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111040 |
| Series | NB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 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 |
Quantity
Federal Pacific NB111040 - 40A 1 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111040-R |
| Series | NB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 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
Built for commercial and industrial power distribution, the Federal Pacific NB111040 delivers 40A of thermal-magnetic protection. This single-pole breaker is designed to maintain safety and performance in older electrical systems. It mounts into legacy Federal Pacific NB and NBLP panelboards, providing an exact fit for discontinued hardware. For modern alternatives, this unit is replaced by the Connecticut Electric UBIF40NB substitute.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NB111040 |
| Series | NB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 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
6 answersWhich panelboards accept the Federal Pacific NB111040 circuit breaker?
This 1-pole bolt-on breaker is designed exclusively for legacy Federal Pacific NB and NBLP panelboards. It is not compatible with standard Stab-Lok residential load centers.
Is there a modern replacement available for the obsolete Federal Pacific NB111040?
Yes. The Connecticut Electric UBIF40NB serves as a direct, ETL-listed aftermarket substitute for this 40A bolt-on breaker.
How does the NB111040 connect to the panel bus?
It utilizes a secure bolt-on connection, which provides a stable mechanical and electrical contact directly to the panel bus, unlike plug-in Stab-Lok designs.
What wire sizes are supported by the load side lugs on the NB111040?
The terminal lugs accept wire gauges ranging from 14 AWG to 2 AWG.
Does the NB111040 provide both overload and short circuit protection?
Yes. It features a thermal magnetic trip unit with fixed long-time and instantaneous functions to protect against both sustained overloads and sudden short circuits.
What applications is the 40A NB111040 breaker typically used for?
This 40A, 120VAC breaker is commonly used to protect dedicated 120V branch circuits in commercial and industrial settings utilizing legacy NB or NBLP distribution panels.
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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.