Free Shipping Over $99
Federal Pacific NA3P50 Miniature Circuit Breaker
- 50A
- 3 Pole
- Plug-On
Federal Pacific
NA3P50
Miniature Circuit Breaker
Brand
Federal Pacific
SKU
NA3P50
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Federal Pacific NA3P50 - 50A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
Sold out
Quantity
Federal Pacific NA3P50 - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NA3P50 |
| Series | NA |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Stab-Lok Panelboards |
| Wire Gauge | 14 AWG - 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 |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Stab-Lok System, Common Trip, 1 Inch per Pole |
Quantity
Federal Pacific NA3P50 - 50A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NA3P50-R |
| Series | NA |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Stab-Lok Panelboards |
| Wire Gauge | 14 AWG - 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 |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Stab-Lok System, Common Trip, 1 Inch per Pole |
Similar Items
30A 3 Pole Miniature Circuit Breaker
20A 3 Pole Miniature Circuit Breaker
15A 3 Pole Miniature Circuit Breaker
Description
Restoring older electrical systems requires precise components, and this 50A Federal Pacific replacement fits the bill perfectly. It mounts into classic Stab-Lok panelboards without requiring any aftermarket adapters or modifications. Featuring a standard 10kAIC rating at 240VAC, this three-pole unit utilizes proven thermal-magnetic trip technology. It serves as a reliable substitute for hard-to-find originals, ensuring commercial and industrial applications remain operational.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NA3P50-R |
| Series | NA |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Stab-Lok Panelboards |
| Wire Gauge | 14 AWG - 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 |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Stab-Lok System, Common Trip, 1 Inch per Pole |
Product FAQs
6 answersWhich panelboards accept the NA3P50 circuit breaker?
This breaker is designed exclusively for legacy Federal Pacific Electric (FPE) Stab-lok load centers and panelboards. It utilizes the proprietary Stab-lok mounting design and will not fit standard plug-on panels from other manufacturers.
Are there known safety hazards associated with Federal Pacific Stab-lok breakers?
Yes. Independent testing and the Consumer Product Safety Commission have documented that original FPE Stab-lok breakers have a high failure rate when tripping under overload or short-circuit conditions. Many industry professionals recommend replacing the entire panel to mitigate fire risks.
Is there a modern replacement available for the NA3P50?
Yes. Connecticut Electric manufactures new aftermarket replacement breakers for the Stab-lok series. The direct cross-reference for the NA3P50 is the UBIF350N, which is built to modern safety standards.
Does the NA3P50 require an adapter kit for installation?
No. It features the authentic Stab-lok mounting style and acts as a direct drop-in replacement for existing Federal Pacific distribution equipment without requiring aftermarket modifications.
Can the NA3P50 be used in systems requiring a higher interrupting capacity than 10kAIC?
No. This breaker is strictly rated for a maximum of 10kA at 240VAC. If the available fault current at the panel exceeds 10,000 amps, a different panel or upstream current limiting protection is required by code.
How should the wiring connections be secured on the NA3P50?
The load side lugs must be tightened to the manufacturer specified torque. Loose connections are a documented fire hazard in aging Stab-lok panels, often exacerbated by differing expansion rates of metal components over time.
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 4.9 out of 5 based on 28 reviews.
Search
Rating
28 reviews
- JMJimmy M.Verified BuyerReviewingFederal Pacific NA230 - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26NA230-30
Breaker arrived well packaged and sealed. Installed easily and working great for the customer.
- JEJames E.Verified BuyerReviewingFederal Pacific NA250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/23/26Satisfactory
Fast shipping and exactly as expected
- EDErik D.Verified BuyerReviewingFederal Pacific NA250 - 50A 2 Pole Miniature Circuit BreakerI do not recommend this productRated 1 out of 5 stars7/21/26Result of FP
Breakers were wrong size and could not be useful....lost monies.
- JLJeff L.Verified BuyerReviewingFederal Pacific NA20 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/22/26Hard to find breaker
Fit perfectly. Great service
- PPPaul P. J.Verified BuyerReviewingFederal Pacific NA20 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/27/25perfect ...
all is great in the universe the FP 20A Breaker worked perfect.