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Federal Pacific NFJ431225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Federal Pacific
NFJ431225
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NFJ431225
Quantity
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Federal Pacific NFJ431225 - 225A 3 Pole Molded Case Circuit Breaker
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Description
Designed to maintain existing electrical infrastructure, this 3-pole, 225-amp molded case circuit breaker is a direct fit for legacy Federal Pacific panelboards. The bolt-on unit eliminates the need for costly panel replacements while delivering dependable overcurrent protection. Operating at up to 480VAC, it utilizes a fixed thermal magnetic trip mechanism for precise long-time and instantaneous defense, achieving an 18 kAIC interrupt capacity at its maximum voltage.Specifications
| Brand | Federal Pacific |
|---|---|
| Series | NFJ |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards accept the Federal Pacific NFJ431225?
This N-Frame molded case circuit breaker is designed as a direct, bolt-on replacement for legacy Federal Pacific panelboards. It allows you to maintain existing electrical infrastructure without requiring a complete panel changeout.
What are the wire size requirements for the NFJ431225 lugs?
The terminal lugs on this breaker are designed to accommodate wire gauges ranging from 4 AWG up to 300 kcmil. Ensure your conductors are properly sized for the 225A load and torqued to the manufacturer specifications during installation.
How does the interrupting capacity (AIC) change based on system voltage?
The breaker provides a 25kAIC rating when installed on 240V AC systems. When used on 480V AC systems, the interrupting capacity is rated at 18kAIC.
Is the trip unit on the NFJ431225 adjustable?
No, this breaker features a fixed thermal magnetic trip unit. The Long-Time and Instantaneous (LI) trip functions are factory set and cannot be field adjusted.
Are original Federal Pacific NFJ breakers still being manufactured?
Federal Pacific is a legacy brand, and original NFJ series breakers are no longer in active production. We supply exact drop-in replacements to keep aging commercial panels operational.
What should be inspected before installing a replacement FPE breaker?
Before installing a replacement breaker in a legacy Federal Pacific panelboard, a licensed electrician should thoroughly inspect the busbars and mounting hardware for signs of pitting, corrosion, or thermal damage.
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Reviews
Review summary
Customers rate this product 4.7 out of 5 based on 3 reviews.
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Rating
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