Free Shipping Over $99
Federal Pacific NEF437040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Federal Pacific
NEF437040
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEF437040
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Federal Pacific NEF437040 - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Sold out
Quantity
Federal Pacific NEF437040 - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF437040-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 |
|---|---|
| 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 |
Quantity
Federal Pacific NEF437040 - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF437040-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 |
|---|---|
| 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 |
Similar Items
40A 3 Pole Molded Case Circuit Breaker
40A 3 Pole Molded Case Circuit Breaker
50A 3 Pole Molded Case Circuit Breaker
Description
A drop-in replacement for discontinued systems, the Federal Pacific NEF437040 restores functionality to older commercial setups. This 3-pole, 40A molded case circuit breaker features a rugged thermal-magnetic trip unit. It installs into classic Federal Pacific NEF panelboards, eliminating the need for complex retrofits. As a cross-reference for NEF433040 and NEF435040, it ensures a precise fit. Rated 14kAIC at 480VAC, this bolt-on MCCB is HACR rated and suitable for reverse feed applications.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEF437040-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 |
|---|---|
| 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
7 answersWhat panelboards accept the Federal Pacific NEF437040 circuit breaker?
The NEF437040 is a legacy N-Frame molded case circuit breaker engineered specifically as an exact-fit replacement for older Federal Pacific NEF commercial panelboards.
What wire gauge range is supported by the NEF437040 terminals?
The load-side lugs on this 40A breaker are designed to accept wire sizes from 14 AWG up to 2 AWG. Always verify proper torque specifications during installation to ensure a secure connection.
Does the NEF437040 share the same safety concerns as FPE Stab-Lok breakers?
No. The NEF437040 is a commercial-grade, bolt-on molded case circuit breaker (N-Frame). It is a completely different design from the residential FPE Stab-Lok plug-on breakers that are commonly flagged for safety and obsolescence issues.
Are original Federal Pacific NEF437040 breakers still manufactured?
Federal Pacific Electric (FPE) is no longer in business, and original NEF series breakers are obsolete. Replacements for existing infrastructure are sourced through specialty electrical suppliers to maintain older commercial panelboards.
Can the NEF437040 be utilized in direct current (DC) applications?
Yes, this thermal-magnetic breaker is rated for DC systems, providing an interrupting capacity of 10kAIC at 250VDC, in addition to its standard 240VAC and 480VAC ratings.
Does the NEF437040 feature an adjustable trip unit?
No, this breaker is equipped with a non-interchangeable, fixed thermal-magnetic trip unit. It provides preset long-time (overload) and instantaneous (short-circuit) protection functions.
How does the NEF437040 connect to the panelboard bus?
This breaker utilizes a bolt-on mounting style. Bolt-on connections provide a secure, vibration-resistant mechanical and electrical connection to the bus bars, which is standard for commercial and industrial NEF panelboards.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
Search
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.