Federal Pacific NJ621125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Unit Mount
Quantity
Federal Pacific NJ621125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for heavy-duty applications, the Federal Pacific NJ621125 is a 2-pole, 125A molded case circuit breaker. It serves industrial facilities relying on legacy 600VAC or 250VDC electrical systems. The unit-mount configuration installs into existing Federal Pacific panels and switchboards. As an exact N-Frame replacement, it ensures proper fitment and restores power without requiring complex upgrades. Featuring a 30 kAIC rating at 480VAC, it utilizes fixed thermal and adjustable magnetic trips.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NJ621125-R |
| Series | NJ |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC |
| Frame Type | NJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific Panels, Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
4 answersWhat equipment is compatible with the NJ621125 circuit breaker?
The NJ621125 is designed as a direct replacement for legacy Federal Pacific panels and switchboards that accept N-Frame unit-mount circuit breakers.
How does the adjustable magnetic trip function on the NJ621125 operate?
While the thermal element provides fixed overload protection, the adjustable magnetic trip allows the installer to fine-tune the instantaneous short-circuit response threshold to suit specific load requirements.
Is the Federal Pacific NJ621125 still being manufactured?
Federal Pacific Electric is no longer in business, so original production of the NJ621125 has ceased. These breakers are sourced as exact legacy replacements to maintain existing electrical systems without requiring a full panel upgrade.
What should be inspected when installing a replacement NJ621125 breaker?
When replacing legacy components like the NJ621125, always verify that the existing panel busbars and mounting hardware are in good condition and free of pitting or corrosion before bolting on the new unit.
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