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Federal Pacific NFJ631100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Federal Pacific
NFJ631100
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NFJ631100
Quantity
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Federal Pacific NFJ631100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty commercial distribution, this 100A Federal Pacific molded case circuit breaker operates across 240V, 480V, and 600V systems. It features a standard bolt-on configuration, making it an exact drop-in replacement for aging or damaged units in Federal Pacific NFJ panelboards. Equipped with non-interchangeable thermal magnetic trip technology, the breaker delivers reliable LI protection and handles up to 18kA fault currents at 480VAC.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NFJ631100 |
| Series | NFJ |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| 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 answersWhat panelboards are compatible with the Federal Pacific NFJ631100?
The NFJ631100 is designed specifically for use in legacy Federal Pacific NFJ panelboards. It features a bolt-on connection to mount directly to the panel bus, eliminating the need for retrofit adapter kits.
What wire sizes are accepted by the lugs on the NFJ631100?
The load-side lugs on this breaker accept wire gauges ranging from 4 AWG up to 300 kcmil. Always verify that your conductor material and size comply with local electrical codes for a 100A circuit.
Does the NFJ631100 feature adjustable trip settings?
Yes, this thermal-magnetic breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
Are original Federal Pacific NFJ631100 breakers still manufactured?
Federal Pacific Electric is no longer in business, meaning original NFJ-frame breakers are obsolete. Exact replacements are sourced from legacy inventory to maintain existing FPE NFJ panelboards without requiring a complete panel retrofit.
Can the NFJ631100 be used in 480V and 600V commercial systems?
Yes, this breaker is rated for up to 600V AC, making it suitable for 240V, 480V, and 600V applications. Ensure your system's available fault current does not exceed its interrupting ratings, which peak at 25kA at 240V AC and 14kA at 600V AC.
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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