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Federal Pacific NEF433040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Federal Pacific
NEF433040
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF433040
Quantity
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Federal Pacific NEF433040 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Built to support industrial power networks, this 40A three-pole breaker delivers essential long-time and instantaneous overcurrent protection. The robust N-frame design is engineered to withstand challenging commercial conditions. Facility managers rely on this exact-match component to populate classic Federal Pacific NEF and CDP panelboards. The bolt-on mounting style guarantees a secure connection within the enclosure. Capable of interrupting 14kA at 480VAC, it also supports reverse feeding.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF433040-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, CDP 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
5 answersWhich panelboards are compatible with the NEF433040 circuit breaker?
The NEF433040 is designed for use in legacy Federal Pacific NEF panelboards and CDP panelboards. It requires a bolt-on connection to mount securely to the busbar.
What are the alternate catalog numbers for the Federal Pacific NEF433040?
This 40-amp NEF breaker is also known by the alternate catalog numbers NEF431040, NEF435040, and NEF437040. These represent the same physical N-frame and electrical specifications.
What does the LI trip function indicate on the NEF433040?
The LI designation means this thermal magnetic breaker provides Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for short circuits. Both the thermal and magnetic trip settings are fixed.
What wire sizes are accepted by the lugs on the NEF433040?
The load side lugs on this 40A breaker accept wire gauges ranging from 14 AWG up to 2 AWG. Ensure proper torque is applied during installation as specified on the breaker label.
Is the Federal Pacific NEF433040 considered a Stab-Lok breaker?
No. The NEF433040 is a commercial grade, bolt-on molded case circuit breaker designed for NEF and CDP panelboards. It does not use the residential Stab-Lok plug-in connection design that is commonly associated with safety hazards and replacement mandates.
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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.