Federal Pacific 2B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific 2B125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for commercial applications, the Federal Pacific 2B125 delivers 125 amps of thermal-magnetic protection. This two-pole molded case breaker operates at 240VAC to safeguard critical branch circuits. Designed specifically as an exact fit for legacy Federal Pacific NBLP panelboards, it installs via a secure bolt-on connection. Facility managers can also cross-reference this unit with the UBIF2125NB substitute for ongoing maintenance needs.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | 2B125 |
| Series | 2B |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | 2B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NBLP Panelboards |
| Wire Gauge | 6-1/0 AWG (Cu), 4-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch |
|---|---|
| Accessories | Lugs Included |
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Main Breaker |
Product FAQs
4 answersCan the 2B125 be used in standard Federal Pacific Stab-Lok residential panels?
No, the 2B125 is a commercial bolt-on molded case circuit breaker specifically designed for legacy Federal Pacific NBLP panelboards. It is not compatible with residential Stab-Lok load centers.
Does the 2B125 require specialized mounting hardware for installation?
No, this breaker utilizes a standard bolt-on connection to secure directly to the busbar of legacy Federal Pacific NBLP panelboards. Ensure the panel bus is de-energized and inspected before bolting the unit in place.
What is the modern cross-reference for the Federal Pacific 2B125?
For ongoing maintenance or replacement needs, the Connecticut Electric UBIF2125NB serves as a direct substitute designed to fit the same legacy NBLP panelboards.
What safety considerations apply when servicing legacy Federal Pacific panels?
Legacy FPE equipment is known for historical reliability issues. When installing a replacement breaker, a licensed electrician should thoroughly inspect the panel busbar for signs of arcing or heat damage to determine if a complete panel upgrade is necessary.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
- TSTAYLOR S.Verified BuyerReviewingFederal Pacific 2B150 - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/26/26Perfect Fit
I had a 100amp breaker and the main breaker would frequently trip during the summers whenever I had the a/c and either of the washer or dryer running at the same time. Being an older fuse box, parts aren’t readily available everywhere. Easy to find on this site and I ordered a refurbished breaker and it came very clean in great shape. I’ve had it installed now 3 days and no breaker trips or any issues. Love the fact they even have a warranty on their refurbished parts.
- JPJose P.Verified BuyerReviewingFederal Pacific 2B150 - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/19/26150A 2 pole breaker
It matched the one I needed exactly