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Federal Pacific NEF435070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Federal Pacific
NEF435070
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF435070
Quantity
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Federal Pacific NEF435070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Operating at 480VAC, this 70-amp molded case circuit breaker is built for heavy-duty commercial and industrial applications. It features a non-interchangeable trip unit that provides standard long-time and instantaneous protection. Designed as a drop-in solution, the three-pole breaker installs into older Federal Pacific panelboards. It allows facilities to safely maintain existing electrical systems. Rated for 14kAIC at 480V and 18kAIC at 240V, the unit is suitable for reverse feed setups.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF435070-R |
| Series | NEF |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Panelboards |
| Wire Gauge | 4-1/0 AWG |
| Max Wire | 1/0 AWG |
| 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, Undervoltage Release, Bell Alarm |
|---|---|
| Accessories | Lugs Included |
| Standards | CSA C22.2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed Suitable |
Product FAQs
7 answersWhat panelboards accept the Federal Pacific NEF435070?
This N-frame breaker is designed exclusively for legacy Federal Pacific (FPE) commercial panelboards that require bolt-on NEF series breakers. It is used to maintain existing systems without requiring a complete panel retrofit.
What wire sizes are compatible with the lugs on the NEF435070?
The factory-installed lugs accept wire gauges from 4 AWG up to 1/0 AWG. Electricians must verify that the selected conductor material and size comply with local electrical codes for a 70A circuit.
How does the thermal magnetic trip unit operate on this breaker?
The NEF435070 features a fixed LI (long-time and instantaneous) trip function. The thermal component responds to prolonged overloads by heating and tripping the circuit, while the magnetic component reacts immediately to high fault short circuits.
What are the maximum fault current ratings for the NEF435070?
This breaker is rated to safely interrupt fault currents up to 14kA at 480VAC, 18kA at 240VAC, and 10kA at 250VDC. You must verify that the available fault current at your panel does not exceed these limits.
Can the trip settings on the NEF435070 be adjusted in the field?
No. This breaker is built with fixed thermal and fixed magnetic trip settings. If your application requires adjustable trip curves, a different breaker series or a retrofit solution will be necessary.
How is the NEF435070 secured inside the panelboard?
It uses a bolt-on mounting style. The breaker must be bolted directly to the panelboard busbars, which provides a highly secure mechanical and electrical connection suitable for commercial and industrial environments.
Are original Federal Pacific NEF breakers still in active production?
Federal Pacific Electric (FPE) is no longer manufacturing new equipment. The NEF435070 is a legacy component used specifically by panel builders and maintenance teams to service existing FPE infrastructure.
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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.