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Federal Pacific NEJ231125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Federal Pacific
NEJ231125
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NEJ231125
Quantity
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Federal Pacific NEJ231125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Restoring power in aging commercial facilities requires exact-fit components like this 125-amp, three-pole molded case breaker. Designed specifically for 240VAC applications, it delivers essential long-time and instantaneous trip functions for industrial loads. Mounting securely into classic Federal Pacific panelboards, this N-frame unit eliminates the need for retrofitting. It serves as an exact substitute for UBINEJ231125 hardware. Featuring a 10kAIC rating and non-interchangeable trip.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NEJ231125-R |
| Series | NEJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs |
|---|---|
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards accept the NEJ231125 circuit breaker?
This N-frame breaker is designed to bolt directly into classic Federal Pacific panelboards. Depending on the specific panel type, such as CDP or NDP series, you may need dedicated twin mounting hardware kits like the NEJ1K or NDPNEJ to secure the breaker to the bus.
Is there a direct aftermarket replacement for the Federal Pacific NEJ231125?
Yes, the UBINEJ231125 manufactured by Connecticut Electric serves as an exact-fit aftermarket substitute. It matches the physical dimensions and electrical specifications of the original Federal Pacific N-frame breaker without requiring panel modifications.
What wire sizes are accepted by the load side lugs on this breaker?
The included load side lugs accept aluminum or copper conductors ranging from 4 AWG up to 300 kcmil. Electricians must ensure proper torque specifications are followed during installation to maintain a secure, code-compliant connection.
What type of trip unit is installed in the NEJ231125?
It features a non-interchangeable, fixed thermal-magnetic trip unit. This provides standard long-time thermal protection against overloads and instantaneous magnetic protection against short circuits, designated by the LI trip function code.
Does this breaker plug in or bolt on to the busbar?
The NEJ231125 is a bolt-on molded case circuit breaker. It requires mechanical fastening to the panelboard bus, providing a secure and vibration-resistant connection suitable for commercial and industrial applications.
Can this 3-pole breaker be used on 480V systems?
No. The NEJ231125 has a maximum voltage rating of 240V AC. It is strictly intended for 208Y/120V or 240V three-phase systems and must not be installed on 480V or 600V distribution networks.
What safety inspections are recommended when installing this breaker in legacy panels?
When integrating components into aging Federal Pacific infrastructure, licensed electricians should thoroughly inspect the existing panel busbars for signs of pitting, corrosion, or thermal damage before bolting on the replacement breaker to ensure safe operation.
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