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Federal Pacific NEF433050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Federal Pacific
NEF433050
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF433050
Quantity
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Federal Pacific NEF433050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Serving as a reliable replacement component, this 50-amp MCCB maintains power distribution in older commercial facilities. The Federal Pacific NEF433050 ensures continued operation without requiring a complete system upgrade. It installs seamlessly into legacy NEF panelboards using a standard bolt-on connection. Facility managers can use this unit to replace hard-to-find NEF437050 or NEF431050 breakers. Delivering 18 kAIC at 240VAC, the breaker features fixed thermal-magnetic trip functions.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF433050-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 |
| 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 Suitable, Vibration Tested |
Product FAQs
5 answersWhat panelboards are compatible with the NEF433050 breaker?
This bolt-on breaker is designed specifically for use in legacy Federal Pacific NEF panelboards.
What are the known alternate catalog numbers for the NEF433050?
This 50-amp NEF frame breaker is also known in the industry under catalog numbers NEF431050, NEF435050, and NEF437050.
What wire gauge range do the factory lugs accept?
The standard lugs on this N-frame breaker accommodate wire sizes from 14 AWG up to 2 AWG.
Is the NEF433050 rated for direct current (DC) systems?
Yes, in addition to its AC ratings, this thermal magnetic breaker is rated for use in DC applications up to 250VDC with an interrupting capacity of 10kA.
How is the NEF433050 secured in the panel?
This is a bolt-on breaker, meaning it requires mechanical fasteners to secure the line side connections directly to the panelboard bus.
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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.