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Federal Pacific NF631020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Federal Pacific
NF631020
Molded Case Circuit Breaker
Brand
Federal Pacific
SKU
NF631020
Quantity
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Federal Pacific NF631020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
A drop-in replacement for aging commercial and industrial systems, the Federal Pacific NF631020 is a 3-pole, 20-amp molded case circuit breaker. It features a fixed thermal-magnetic trip unit designed to protect against overloads and short circuits in demanding environments. This bolt-on MCCB installs into legacy Federal Pacific NF panelboards, eliminating the need for complex retrofits. Rated for 600VAC maximum, it delivers a solid 18kAIC interrupting capacity at 480VAC and 14kAIC at 600VAC.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NF631020-R |
| Series | NF |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NF Panelboards |
| Wire Gauge | 14-1/0 AWG |
| Max Wire | 1/0 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5.1, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the Federal Pacific NF631020 circuit breaker?
This molded case circuit breaker is engineered specifically for legacy Federal Pacific NF panelboards. Its bolt-on configuration aligns directly with the busbar spacing in these specific enclosures.
What wire sizes are compatible with the terminal lugs on the NF631020?
The factory lugs accept conductors ranging from 14 AWG to 1/0 AWG. Always verify the appropriate wire size and insulation rating based on the 20A load requirements and local electrical codes.
How does the interrupting rating of the NF631020 change across different system voltages?
While rated for a maximum of 600V AC, the interrupting capacity scales based on the system voltage. It provides 14kAIC at 600V, 18kAIC at 480V, and up to 25kAIC on 240V systems, allowing it to handle higher fault currents in lower-voltage applications.
How does the thermal-magnetic trip unit function in the NF631020?
The breaker uses a fixed LI (long-time and instantaneous) trip mechanism. The thermal component responds to sustained overloads by heating up and tripping the breaker, while the magnetic component provides immediate tripping during high-current short circuits.
Can I use a different frame type to replace the NF631020 in my panel?
No. You must use an NF frame breaker to ensure proper fitment and safe operation in a Federal Pacific NF panelboard. Other frame types will not align with the bolt-on bus connections or the deadfront cover.
Are the trip settings on the NF631020 adjustable?
No. This breaker features fixed thermal and fixed magnetic trip settings. The long-time and instantaneous protection parameters are factory set for a 20A load and cannot be modified in the field.
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