Built for commercial applications, the Federal Pacific NB232035 is a 3-pole, 35A miniature circuit breaker. It features a reliable thermal-magnetic trip mechanism for standard LI protection. This legacy component mounts into Federal Pacific NB panelboards via a secure bolt-on connection. It serves as an exact fit for older infrastructure and is replaced by the UBIF335NB. Rated for 10 kAIC at 240VAC, it provides essential fault protection while maintaining the original equipment footprint.
What panelboards are compatible with the NB232035 breaker?
This breaker is designed specifically for Federal Pacific NB series commercial panelboards. Because it utilizes a bolt-on mounting mechanism, it is not compatible with residential FPE Stab-Lok load centers.
Is there a direct aftermarket replacement for the NB232035?
Yes, the UBIF335NB, manufactured by Connecticut Electric under the UBI brand, serves as a direct drop-in replacement for this legacy 35-amp, 3-pole breaker.
What wire gauges and materials are supported by the terminal lugs?
The load-side lugs accommodate 14 AWG to 2 AWG wire and are rated for both aluminum and copper conductors.
How does the trip mechanism function on this NB series breaker?
It utilizes a fixed thermal-magnetic trip unit. The thermal component provides long-time protection against gradual overloads, while the magnetic component delivers instantaneous tripping during severe short circuits.
What is the physical width of this 3-pole breaker?
The NB232035 measures 3 inches wide overall, occupying 1 inch of space per pole on the panelboard bus.
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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.
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