The Federal Pacific NE234040 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 40 Amps and a voltage rating of 240VAC. It has an interrupting rating of 18kAIC at 240V. The NE234040 has a bolt-on connection type and includes LI - long-time and instantaneous trip functions.
Which panelboards accept the Federal Pacific NE234040 circuit breaker?
The NE234040 is compatible with Federal Pacific CDP and BDP series distribution panelboards. It requires specific bus connection hardware kits, such as the NEF1K or NEF3K, to mount correctly.
How is the NE234040 secured inside the panelboard?
It utilizes a bolt-on mounting configuration. The breaker bolts directly to the panel busbars using a compatible hardware strap kit, ensuring a rigid and reliable connection for 3-phase industrial applications.
How does the LI trip function operate on the NE234040?
The LI designation stands for long-time and instantaneous protection, provided by a thermal-magnetic trip unit. The thermal element responds to prolonged overcurrents, while the magnetic element trips immediately in the event of a short circuit.
Is the Federal Pacific NE234040 still actively manufactured?
No. Federal Pacific Electric (FPE) is no longer in business, making original NE frame breakers obsolete. Exact replacements are used by electricians to maintain existing FPE switchgear and distribution panels without requiring a complete system retrofit.
What should be inspected before installing a replacement NE234040 breaker?
Because FPE panels are legacy equipment, electricians must inspect the panel busbars and mounting hardware for signs of pitting, arcing, or heat damage. Ensure all bolt-on connections are properly torqued to prevent loose contacts and overheating.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Federal Pacific NE233100 - 100A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
10/6/25
Had what we needed
needed an old FP breaker SP had it in stock. saved us from downtime
RV
Robert V.
Reviewing
Federal Pacific NE233050 - 50A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
5/5/22
Hard to Find
It was a relief to find this working Federal Pacific CB for our church’s Main HVAC supply panel- We are in Florida and it is hot now! services and social events are happening in the cool of the restored AC- thank God!!