Connecticut Electric UBIF250NB Miniature Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Quantity
Connecticut Electric UBIF250NB - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Manufactured by Connecticut Electric, the UBIF250NB is a 50A, 2-pole miniature circuit breaker built for commercial and industrial applications. It delivers reliable thermal-magnetic protection for 120/240VAC systems. This bolt-on unit serves as a safety-certified replacement for obsolete Federal Pacific Electric (FPE) NB250 breakers. It mounts into FPE NBLP panelboards, ensuring proper fitment with its 2-inch thick Type NB body. Rated at 10 kAIC, this breaker is also HACR rated.Specifications
| Brand | Connecticut Electric |
|---|---|
| Series | UBIF |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NBLP Panelboards |
| Wire Gauge | 14-6 AWG |
| Max Wire | 6 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 | HACR, UL 489 |
| Approval | ETL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
5 answersWhat panelboards are compatible with the Connecticut Electric UBIF250NB?
This breaker is designed specifically for use in legacy Federal Pacific Electric (FPE) NBLP commercial panelboards that accept bolt-on Type NB breakers.
Which obsolete Federal Pacific breaker does the UBIF250NB replace?
The UBIF250NB serves as a direct, safety-certified replacement for the original Federal Pacific Electric (FPE) NB250 2-pole, 50-amp bolt-on circuit breaker.
What wire gauge is compatible with the UBIF250NB terminals?
The breaker features lug terminals designed to accept wire sizes ranging from 14 AWG to 6 AWG. Ensure proper torque specifications are followed during installation.
How does the trip mechanism function on the UBIF250NB?
It utilizes a fixed thermal-magnetic trip unit (LI). The thermal component provides long-time protection against sustained overloads, while the magnetic component offers instantaneous protection against short circuits.
Is the UBIF250NB tested to modern safety standards?
Yes, this Connecticut Electric replacement breaker is ETL listed to UL 489 standards, ensuring it meets strict safety and performance requirements for use in legacy FPE NBLP panelboards.
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