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Federal Pacific NEF435040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Federal Pacific
NEF435040
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF435040
Quantity
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Federal Pacific NEF435040 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy N-Frame series, the NEF435040 is a 40A, 3-pole molded case circuit breaker by Federal Pacific. It delivers essential thermal-magnetic protection for commercial power networks. This component mounts into FPE NEF panelboards, providing an exact fit for aging infrastructure. It substitutes NEF433040 and NEF437040 breakers for seamless integration. Delivering 14kAIC at 480VAC, the unit includes fixed trip functions. It is vibration tested and approved for reverse feed operations.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF435040-R |
| Series | NEF |
| Amperage | 40A |
| 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, Padlock Attachment |
|---|---|
| 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 |
Product FAQs
5 answersWhich panelboards are compatible with the NEF435040 circuit breaker?
The NEF435040 is designed exclusively for use in legacy Federal Pacific NEF panelboards. It features a bolt-on connection to secure directly to the panel bus.
What wire sizes do the lugs on the NEF435040 accept?
The factory lugs on this breaker accommodate conductors ranging from 14 AWG to 2 AWG. Always verify the correct torque specifications during installation to ensure a secure and compliant connection.
How does the thermal-magnetic trip unit in the NEF435040 operate?
It utilizes a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element provides delayed tripping for sustained overloads, while the magnetic element trips immediately in the event of a short circuit.
What frame family does the NEF435040 belong to?
This breaker is part of the Federal Pacific N-Frame series. It shares the same physical dimensions as other NEF breakers, ensuring a proper fit in compatible legacy enclosures.
Is the Federal Pacific NEF435040 still in active production?
Federal Pacific Electric is no longer in business, making the NEF435040 a legacy component. It is primarily sourced to maintain and service existing NEF panelboards without requiring a complete panel replacement.
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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.