Federal Pacific 4340 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Plug-On
Quantity
Federal Pacific 4340 - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Rated for 40 amps across three poles, this thermal-magnetic molded case circuit breaker handles demanding commercial loads. It utilizes a proven NF-S frame design to deliver consistent trip functions. This unit serves as an exact replacement for the discontinued NF631040. It installs into Federal Pacific NF panelboards, utilizing a plug-on mounting style that requires no special adapters. Capable of interrupting 14kA at 600VAC, it provides robust fault protection for legacy systems.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | 4340-R |
| Series | 43 |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Federal Pacific NF 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5.1, NEMA AB 1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | NF-S Frame |
Product FAQs
6 answersWhich panelboards accept the Federal Pacific 4340 circuit breaker?
This breaker is designed exclusively for Federal Pacific NF panelboards. It features a plug-on mounting style that installs directly into the chassis without requiring special adapters.
What discontinued Federal Pacific breaker does the 4340 replace?
The 4340 is an exact replacement for the discontinued Federal Pacific NF631040. Both utilize the NF-S frame design and share identical physical dimensions and plug-on mounting configurations.
What wire sizes are supported by the terminal lugs on the 4340?
The factory-installed lugs accommodate wire gauges from 14 AWG up to 2 AWG. Ensure proper torque specifications are followed during installation for secure connections.
How does the interrupting capacity scale across different voltages for the 4340?
The AIC rating scales based on the system voltage. It provides 18kA at 240VAC and 480VAC, drops to 14kA at 600VAC, and is rated for 10kA in 250VDC applications.
Are the trip settings adjustable on the Federal Pacific 4340?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory-set and cannot be adjusted in the field.
Is the 4340 part of the Federal Pacific Stab-Lok residential line?
No. The 4340 is an NF-S frame molded case circuit breaker engineered for commercial and industrial NF panelboards. It does not use the Stab-Lok connection design.
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