Federal Pacific NFJ424090 Molded Case Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Quantity
Federal Pacific NFJ424090 - 90A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Operating at up to 480VAC, the Federal Pacific NFJ424090 is a 2-pole molded case circuit breaker rated for 90 amps. It features fixed thermal and adjustable magnetic trip settings for precise overcurrent protection. This bolt-on unit mounts into legacy Federal Pacific NFJ panelboards, serving as an exact replacement to keep older systems running safely. It also cross-references with VPK424090 substitutes. The N-frame breaker delivers an 18kAIC interrupting capacity at 480V to clear faults.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFJ424090 |
| Series | NFJ |
| Amperage | 90A |
| 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 NFJ 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, Adjustable 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 answersWhich panelboards accept the Federal Pacific NFJ424090 circuit breaker?
This breaker is designed specifically for installation in legacy Federal Pacific NFJ panelboards.
What wire sizes are compatible with the terminals on this breaker?
The lugs on the NFJ424090 accept wire gauges ranging from 4 AWG to 300 kcmil.
How does the trip adjustability work on the NFJ424090?
This breaker features a fixed thermal trip for overload protection and an adjustable magnetic trip, allowing electricians to tune the instantaneous short-circuit response for proper system coordination.
Is the Federal Pacific NFJ424090 still in active production?
No. Federal Pacific Electric is no longer in business, making the NFJ424090 a legacy component used primarily to maintain and service existing commercial electrical systems.
Does the NFJ424090 share the same safety issues as Federal Pacific Stab-Lok breakers?
No. The widely documented safety concerns and failure rates associated with Federal Pacific apply to their residential Stab-Lok line. The NFJ series is a commercial molded case circuit breaker, though standard testing is still recommended prior to commissioning any legacy electrical equipment.
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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