Federal Pacific NEF427045 Molded Case Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
Federal Pacific
NEF427045
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF427045
Quantity
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Federal Pacific NEF427045 - 45A 2 Pole Molded Case Circuit Breaker
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Description
Operating as a critical safeguard for aging infrastructure, this 45A Federal Pacific breaker supplies robust thermal-magnetic defense. The legacy N-frame design ensures commercial facilities can maintain their current networks. Engineered for exact compatibility, the unit mounts into classic NEF panelboards without modification. This drop-in replacement strategy eliminates the downtime associated with sourcing modern adapters. Tested for vibration resistance, it provides 18kAIC at 240VAC.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF427045 |
| Series | NEF |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | NEF-7 |
|---|---|
| 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, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed Suitable, Vibration Tested |
Product FAQs
6 answersWhat panelboards accept the NEF427045 circuit breaker?
This bolt-on breaker is designed exclusively for legacy Federal Pacific NEF panelboards. It mounts directly to the busbar, allowing you to replace aging components without retrofitting the entire enclosure.
Does the NEF427045 fit standard FPE N-Frame enclosures?
Yes, it is built on the Federal Pacific NEF-7 frame, which is part of the classic N-Frame lineup. It is physically and electrically matched to fit into spaces designed for 2-pole N-Frame breakers in FPE distribution equipment.
What wire gauge is compatible with the NEF427045 lugs?
The load side lugs accept conductor sizes from 14 AWG to 2 AWG. Always verify the specific torque requirements printed on the breaker label before terminating the conductors.
Can the NEF427045 be used in DC power systems?
Yes, this molded case circuit breaker is rated for DC applications. It provides a 10 kA interrupting capacity at 250 VDC, making it suitable for industrial DC control circuits and distribution.
Can the trip curve on the NEF427045 be adjusted in the field?
No, this breaker features a fixed, non-interchangeable thermal-magnetic trip unit. The long-time and instantaneous (LI) protection settings are factory calibrated and cannot be modified.
Is the Federal Pacific NEF series still in active production?
Federal Pacific Electric is no longer in business, and the original NEF series is obsolete. Sourcing this specific NEF427045 frame is necessary to maintain existing FPE panelboards, as modern breakers from other manufacturers will not fit the proprietary busbar design.
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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.