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Federal Pacific / American NEF431100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Federal Pacific / American
NEF431100
Molded Case Circuit Breaker
Brand
Federal Pacific / American
SKU
NEF431100
Quantity
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Federal Pacific / American NEF431100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Engineered to maintain older electrical systems, the Federal Pacific NEF431100 is a 100A, 3-pole molded case circuit breaker. It provides essential long-time and instantaneous protection for commercial and industrial facilities relying on legacy infrastructure. This N-Frame breaker installs seamlessly into Federal Pacific NEF panelboards.Specifications
| Brand | Federal Pacific / American |
|---|---|
| Part Number | NEF431100-R |
| Series | NEF |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NEF Panelboards |
| 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, Bell Alarm |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2, UL 486B, UL 489, UL 1087 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
4 answersWhat panelboards accept the NEF431100 circuit breaker?
This N-Frame breaker is engineered specifically to install into legacy Federal Pacific NEF panelboards. It serves as a direct replacement component for maintaining existing commercial and industrial distribution systems without requiring a full panel retrofit.
How is the NEF431100 installed into the panel?
It utilizes a bolt-on mounting configuration. The breaker bolts directly to the panelboard bus, which ensures a secure, high-contact electrical connection that resists loosening from vibration in industrial environments.
Is the American NEF431100 a direct replacement for original FPE breakers?
Yes. American Circuit Breaker manufactures the NEF431100 as an exact-fit replacement for the obsolete Federal Pacific Electric (FPE) NEF431100. It matches the original N-Frame dimensions and mounting hardware requirements.
How does the thermal magnetic trip unit operate in the NEF431100?
The breaker features fixed thermal and fixed magnetic trip elements, designated by the LI (Long-Time, Instantaneous) trip function code. The thermal element protects against sustained overloads by heating up and tripping, while the magnetic element provides immediate interruption when a high-current short circuit is detected.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
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Rating
6 reviews
- SCStephen C.Verified BuyerReviewingFederal Pacific NEF431030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/21/26Fpe 3 pole 30 amp breaker.
I ordered the breaker on Thursday and it was at my house for Saturday morning. Breaker is in pristine condition. A real bail out. Thank you.
- MRMichael R.Verified BuyerReviewingFederal Pacific NEF431040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Warehouse Air Compressor
Worked like a charm.
Thank you.
- DPDiana P.ReviewingFederal Pacific NEF433020 3 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/21Satisfied
Service was GREAT!!
- DJDavid J.ReviewingFederal Pacific / American NEF431100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/13/21This worked out great.
This worked out great.
- MWMark W.ReviewingFederal Pacific NEF421050 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/17/19Great service & pricing
Superbreakers did a great job for us. We called and asked if the breakers were actually in their possession. Withing 30 minutes they called us back (which is rare these days), and we got our breakers the next morning.