Federal Pacific NFJ424175 Molded Case Circuit Breaker
- 175A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NFJ424175 - 175A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
The Federal Pacific NFJ424175 is a two-pole molded case circuit breaker engineered for demanding commercial applications. With a 175-amp rating and support for 480VAC, it provides essential protection for high-capacity branch circuits. As a dedicated replacement component, this breaker mounts into existing Federal Pacific panelboards. It provides a seamless, no-adapter solution for maintaining older FPE equipment. Featuring fixed thermal-magnetic trip, it carries an 18 kAIC rating at 480V.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFJ424175 |
| Series | NFJ |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards accept the NFJ424175 circuit breaker?
This breaker is specifically engineered for legacy Federal Pacific Electric (FPE) panelboards designed for N-Frame breakers. It provides an exact physical match to the original hardware, eliminating the need for complex retrofits.
Is there a modern replacement available for the Federal Pacific NFJ series?
No direct modern replacement exists for this legacy equipment. Maintaining existing FPE panelboards requires sourcing original NFJ frame breakers to ensure proper fitment and busbar alignment.
Are retrofit kits required to install this breaker in an existing FPE panel?
No. The NFJ424175 features a standard bolt-on connection designed to mount directly to the busbar of compatible Federal Pacific panelboards without the use of specialized adapters.
Can this breaker replace other Federal Pacific N-Frame breakers?
Yes, the NFJ424175 shares the same physical dimensions and bolt-on configuration as other legacy FPE N-Frame breakers. It can serve as a direct swap for models within the same frame class, provided the panel and conductors are properly rated for 175 amps.
What should be inspected before installing a replacement NFJ breaker?
When servicing older FPE panelboards, electricians must verify the condition of the busbar connections. Ensure the mounting points are free of pitting, oxidation, or thermal damage before bolting on the replacement breaker to guarantee a secure electrical connection.
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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