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Federal Pacific NEF435050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Federal Pacific
NEF435050
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF435050
Quantity
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Federal Pacific NEF435050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Federal Pacific NEF435050 - 50A 3 Pole Molded Case Circuit Breaker
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| Brand | Federal Pacific |
|---|---|
| Part Number | NEF435050-R |
| Series | NEF |
| Amperage | 50A |
| 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 NEF Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5.1, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Quantity
Federal Pacific NEF435050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF435050-R |
| Series | NEF |
| Amperage | 50A |
| 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 NEF Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5.1, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
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Description
Part of the legacy NEF series, this 50A molded case circuit breaker provides thermal-magnetic protection for commercial applications. It features a three-pole configuration and reverse feed suitability. Designed as an exact fit for Federal Pacific NEF panelboards, this bolt-on MCCB eliminates retrofitting. It serves as a direct substitute for NEF433050 and NEF437050. Rated at 14kAIC at 480VAC, it delivers robust performance. The non-interchangeable trip unit ensures consistent protection.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF435050-R |
| Series | NEF |
| Amperage | 50A |
| 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 NEF Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5.1, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhat panelboards accept the NEF435050 circuit breaker?
This N-frame breaker is designed specifically for bolt-on installation in legacy Federal Pacific NEF panelboards.
What wire sizes are compatible with the terminals on this breaker?
The included lugs accommodate wire gauges ranging from 14 AWG to 2 AWG, providing flexibility when wiring 50A branch or feeder circuits.
Is the trip unit on the NEF435050 adjustable?
No, it features a fixed thermal-magnetic trip unit providing non-interchangeable long-time and instantaneous (LI) protection.
Can this Federal Pacific breaker be used in DC applications?
Yes, it is rated for use in 250VDC systems with a 10kA interrupting capacity, making it suitable for specific direct current applications in addition to standard AC distribution.
Is the NEF435050 suitable for reverse feed configurations?
Yes, this molded case circuit breaker supports reverse feed setups, allowing for flexible installation in commercial distribution systems.
Can this breaker replace other 50A NEF series models?
Yes, the NEF435050 serves as a direct physical substitute for the NEF433050 and NEF437050, provided its 14kAIC rating at 480VAC meets your specific fault current requirements.
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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.