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Federal Pacific NEF431020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Federal Pacific
NEF431020
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF431020
Quantity
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Federal Pacific NEF431020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Built to restore legacy commercial systems, the Federal Pacific NEF431020 is a 20A, 3-pole molded case circuit breaker. It utilizes a thermal-magnetic trip unit for essential protection. This bolt-on MCCB installs into existing Federal Pacific NEF panelboards without requiring aftermarket adapters. It is a verified substitute for the UBIF320N. With a 14 kAIC rating at 480VAC, this non-interchangeable breaker is vibration tested and approved for reverse feed applications.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF431020-R |
| Series | NEF |
| Amperage | 20A |
| 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, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed, Vibration Tested |
Product FAQs
7 answersWhat panelboards accept the NEF431020 circuit breaker?
This breaker is designed exclusively for legacy Federal Pacific Electric (FPE) NEF panelboards. It utilizes a bolt-on connection to the bus and will not fit in residential FPE Stab-Lok load centers.
Can the NEF431020 be used in DC applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for up to 250V DC with a 10kA interrupting capacity, making it suitable for specific industrial DC circuits.
Is the trip unit on the NEF431020 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time (overload) and instantaneous (short circuit) trip functions are factory-set and cannot be adjusted in the field.
What type of terminals are included with the NEF431020?
This breaker comes equipped with standard load-side lugs that accept 14 AWG to 2 AWG wire. The line side utilizes a bolt-on connection directly to the panelboard bus.
Are there aftermarket replacements available for the Federal Pacific NEF431020?
Yes. Because original Federal Pacific breakers are no longer manufactured, aftermarket brands like Connecticut Electric produce direct replacements. The UBIF320N is a verified substitute for this 20-amp, 3-pole NEF frame breaker.
Is the NEF431020 part of the FPE Stab-Lok series?
No. The NEF431020 is an NEF frame molded case circuit breaker built for commercial and industrial panelboards. It does not use the Stab-Lok plug-on design that is commonly associated with residential FPE safety controversies.
Does the NEF431020 require a separate mounting hardware kit?
Depending on the specific Federal Pacific panelboard configuration, such as CDP or BDP series panels, installing NEF frame breakers may require a bus connection hardware kit (like the NEF1K or NEF3K) to properly mount the breaker to the panel 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.