Federal Pacific NFJ624250 Molded Case Circuit Breaker
- 250A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NFJ624250 - 250A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for heavy-duty commercial and industrial environments, this 250A, two-pole molded case circuit breaker operates safely up to 600VAC. It provides reliable long-time and instantaneous trip functions for critical branch circuits. Designed to maintain existing infrastructure, it bolts into legacy Federal Pacific panelboards without modifications. With an 18 kAIC rating at 480VAC, this NFJ series breaker ensures robust fault clearing and features a non-interchangeable trip unit.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFJ624250 |
| Series | NFJ |
| Amperage | 250A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Frame Type | NFJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhat panelboards accept the NFJ624250 circuit breaker?
This breaker is designed specifically as a drop-in replacement for legacy Federal Pacific NFJ panelboards. It features a bolt-on configuration that matches the original busbar layout.
Is there a modern equivalent or cross-reference for the Federal Pacific NFJ frame?
There is no direct modern replacement manufactured today for the NFJ series. Facilities maintaining existing Federal Pacific infrastructure must rely on original legacy hardware for exact physical and electrical matches.
How are the line and load connections configured on this breaker?
The line side utilizes a bolt-on connection to mount directly to the panelboard bus. The load side is equipped with mechanical lugs that accept conductors ranging from 4 AWG to 300 kcmil.
What type of protection does the thermal-magnetic trip unit provide?
The trip unit delivers standard LI protection, which includes a fixed thermal element for long-time overload protection and a fixed magnetic element for instantaneous short-circuit protection.
How does the interrupting capacity change based on the system voltage?
The breaker provides a maximum interrupting rating of 25kAIC on 240VAC systems. This rating decreases to 18kAIC at 480VAC and 14kAIC at its maximum rated voltage of 600VAC.
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Reviews
Review summary
Customers rate this product 4.7 out of 5 based on 3 reviews.
- ESEvan S.Verified BuyerReviewingFederal Pacific NFJ631225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26Review
Works great!
- RCRalph C.Verified BuyerReviewingFederal Pacific NFJ631150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars11/10/25Federal Pacific NF J631150 Breaker
Surprised they had it!
Great shape, well packaged. Fast shipping
- KPKeith P.ReviewingFederal Pacific NFJ631200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/15/20Quick and easy ordering
Quick and easy ordering