Federal Pacific NEF425040 Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Federal Pacific
NEF425040
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF425040
Quantity
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Federal Pacific NEF425040 - 40A 2 Pole Molded Case Circuit Breaker
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Description
Built for industrial power distribution, this 40A, 2-pole molded case circuit breaker provides a reliable solution for obsolete systems. It installs seamlessly into Federal Pacific panelboards, eliminating the need for complex retrofits or panel upgrades. The bolt-on design ensures a secure connection, while the fixed thermal-magnetic trip delivers trusted long-time and instantaneous protection. Rated 14kAIC at 480VAC, it is HACR rated, vibration tested, and crosses to the UBIF240N.Specifications
| Brand | Federal Pacific |
|---|---|
| Series | NEF |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | NEF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific 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, Undervoltage Release, Auxiliary Switch, Bell Alarm |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed, Vibration Tested |
Product FAQs
6 answersWhat type of panelboards accept the NEF425040 circuit breaker?
This N-frame breaker is designed for installation in legacy Federal Pacific panelboards configured for bolt-on molded case circuit breakers.
What wire sizes are compatible with the terminal lugs on this breaker?
The lugs on the NEF425040 accept wire gauges ranging from 14 AWG to 2 AWG. Ensure proper torque specifications are followed during installation.
What does the LI trip function indicate on this Federal Pacific breaker?
The LI designation means the breaker uses a thermal magnetic trip unit. It provides Long-Time thermal protection for standard overloads and Instantaneous magnetic protection for short circuits.
Can the NEF425040 be used in direct current applications?
Yes, this breaker is rated for DC systems up to 250VDC, where it provides an interrupting capacity of 10kA.
How does this N-frame breaker connect to the panelboard bus?
The NEF425040 utilizes a bolt-on connection type. It must be mechanically bolted directly to the panelboard busbars, ensuring a secure connection for industrial applications.
Can the trip curve on the NEF425040 be adjusted in the field?
No, this breaker features fixed thermal and fixed magnetic trip settings. The trip parameters cannot be modified by the installer.
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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.