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Federal Pacific NEF437050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Federal Pacific
NEF437050
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF437050
Quantity
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Federal Pacific NEF437050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Maintaining power in established facilities, the Federal Pacific NEF437050 provides heavy-duty 50A overcurrent protection. This three-pole molded case circuit breaker utilizes fixed thermal and magnetic trip functions to prevent overloads and short circuits. It fastens into Federal Pacific NEF panelboards, offering a perfect fit for older enclosures. It also replaces NEF435050 models. With a 14kAIC rating at 480VAC, this non-interchangeable trip breaker is reverse feed suitable.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF437050 |
| 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 |
|---|---|
| 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, Vibration Tested |
Product FAQs
4 answersWhich panelboards are compatible with the NEF437050 circuit breaker?
This breaker is designed specifically for use in legacy Federal Pacific NEF panelboards. It requires a direct bolt-on connection to the panel bus.
What are the alternate catalog numbers for the NEF437050?
In legacy Federal Pacific documentation and distributor catalogs, this 50-amp breaker is also known by the part numbers NEF433050 and NEF435050.
What wire gauge range do the lugs on this breaker accept?
The factory lugs on this N-frame breaker accommodate wire sizes from 14 AWG up to 2 AWG. Ensure proper torque specifications are followed during installation.
Does this breaker have adjustable trip settings?
No, it features a fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous protection without field-adjustable dials.
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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.