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Federal Pacific NEF421020 Molded Case Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Federal Pacific
NEF421020
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF421020
Quantity
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Federal Pacific NEF421020 - 20A 2 Pole Molded Case Circuit Breaker
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Description
Designed to maintain aging infrastructure, this 20A, 2-pole molded case circuit breaker provides essential long-time and instantaneous protection. It is an ideal solution for commercial and industrial applications. This bolt-on breaker installs seamlessly into Federal Pacific NEF panelboards, eliminating the need for retrofitting. It serves as a reliable alternative for the UBIF220N substitute model.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF421020-R |
| Series | NEF |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| 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 | Load Side Lugs Included |
| 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
6 answersWhich panelboards are compatible with the NEF421020 circuit breaker?
This breaker is designed specifically for legacy Federal Pacific NEF panelboards. It utilizes a bolt-on connection and is not compatible with FPE Stab-Lok residential load centers.
What wire sizes are accepted by the terminals on the NEF421020?
The breaker comes equipped with standard load-side lugs that accept wire gauges from 14 AWG up to 2 AWG.
What is the maximum fault current this breaker can safely interrupt?
The interrupting rating depends on the operating voltage. It is rated for 18kA at 240V AC, 14kA at 480V AC, and 10kA at 250V DC.
Are the trip settings on the NEF421020 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. It provides standard long-time and instantaneous (LI) protection functions that cannot be modified in the field.
Does the NEF421020 require additional mounting hardware?
While the breaker itself is a bolt-on design, installing it into certain Federal Pacific switchgear or panelboards may require specific bus connection hardware or twin mounting kits, such as the NEF3K for BDP panels.
Is the Federal Pacific NEF421020 still in active production?
No, Federal Pacific Electric is no longer in business, and the NEF frame series is obsolete. Exact-fit legacy replacements are sourced to maintain existing commercial infrastructure without requiring a complete panelboard retrofit.
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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.