Designed specifically for legacy power distribution networks, this 35-amp single-pole breaker offers essential overcurrent safety. It fastens into classic Federal Pacific NB panelboards, providing an exact match for obsolete hardware without requiring extensive modifications. Featuring standard thermal-magnetic trip technology, it handles commercial loads with a 10kA short-circuit rating. This unit successfully replaces older UBIF20NB and NB15 models in existing enclosures.
Which panelboards are compatible with the Federal Pacific NB111035?
This breaker is designed exclusively for use in legacy Federal Pacific NB series panelboards. It will not fit in FPE Stab-Lok load centers.
Can I use this breaker in a standard FPE Stab-Lok residential panel?
No. The NB111035 is a bolt-on circuit breaker designed for commercial NB panelboards. It is not compatible with plug-on Stab-Lok load centers that require NA or NC series breakers.
How does the NB111035 connect to the panelboard busbar?
It features a bolt-on mounting style, meaning it fastens directly to the panel busbar with screws for a secure, vibration-resistant connection.
What size and type of wire can be used with the NB111035?
The load-side lugs on this breaker accept 14 AWG to 2 AWG wire and are rated for both aluminum and copper conductors.
What type of trip mechanism does the NB111035 use?
It utilizes a fixed thermal-magnetic trip unit, providing both long-time thermal protection against overloads and instantaneous magnetic protection against short circuits.
Is this breaker suitable for 240V applications?
No. The NB111035 is a single-pole breaker rated for 120VAC maximum and cannot be used for 240V multi-pole applications.
Are there aftermarket replacements available for the Federal Pacific NB111035?
Yes. Because original Federal Pacific breakers are obsolete, aftermarket manufacturers like Connecticut Electric produce UL-listed replacement breakers designed to fit legacy NB panelboards.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
Federal Pacific NB100 - 100A 2 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
7/2/26
100amp federal pacific breaker
So far the breaker works as expected
Just good to know some of these old federal are still available.
Thank you
SG
scott g.
Verified Buyer
Reviewing
Federal Pacific NB111020 - 20A 1 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
6/26/26
Hard 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.
BF
Barry F.
Verified Buyer
Reviewing
Federal Pacific NB100 - 100A 2 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
6/13/26
Hard to find circuit breaker
Item was as described.
WW
William W.
Verified Buyer
Reviewing
Federal Pacific NB100 - 100A 2 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
3/9/26
Exactly what I needed.
Awesome! Packaging and delivery were good. Bolted in and worked perfectly!!)
GH
Gary H.
Verified Buyer
Reviewing
Federal Pacific NB125 - 125A 2 Pole Miniature Circuit Breaker