Schneider Electric / Merlin Gerin NSJ400N Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Schneider Electric / Merlin Gerin NSJ400N - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty applications, this 3-pole, 400A electronic trip MCCB from Schneider Electric ensures maximum system reliability. It is designed for demanding commercial and industrial environments. The unit-mount configuration fits into Square D switchboards and motor control centers. For facility upgrades, note that this frame is replaced by the LGL36400U31X series.Specifications
| Brand | Schneider Electric / Merlin Gerin |
|---|---|
| Part Number | NSJ400N-R |
| Series | NSJ |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 160-400A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers |
| Wire Gauge | 2 AWG - 600 kcmil (Cu), 2 AWG - 500 kcmil (Al) |
| Max Wire | 600 kcmil |
| Min Wire | 2 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5.1, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL, UL Marine |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
4 answersWhat is the modern replacement for the Merlin Gerin NSJ400N?
For facility upgrades, the NSJ400N frame has been replaced by the Square D PowerPact LGL36400U31X series circuit breaker.
What equipment is the NSJ400N unit-mount breaker compatible with?
This unit-mount configuration is engineered specifically for installation in Square D switchboards and motor control centers.
How does the LSI electronic trip unit function on this breaker?
The microprocessor-based LSI trip unit allows you to customize the Long-Time, Short-Time, and Instantaneous settings. This adjustability helps optimize selective coordination and system protection for commercial or industrial loads.
What lug kit and wire gauge are compatible with the NSJ400N breaker?
The standard 400A mechanical lug kit for the NSJ400N is Schneider Electric part number 32508. These lugs accept copper conductors from 2 AWG to 600 kcmil, and aluminum conductors from 2 AWG to 500 kcmil.
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