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Square D NX361000 Molded Case Circuit Breaker
- 1000A
- 3 Pole
- I-Line
Square D
NX361000
Molded Case Circuit Breaker
Brand
Square D
SKU
NX361000
Quantity
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Square D NX361000 - 1000A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial power distribution, the Square D NX361000 is a 3-pole, 1000A molded case circuit breaker featuring a Micrologic Series B solid-state trip unit. It mounts into Square D I-Line panelboards and switchboards. While often replaced by the PowerPacT PLA34100U33A in new builds, this NX frame is ideal for maintaining existing infrastructure. Rated 100 kAIC at 480V, it delivers robust fault clearing. Adjustable LSI settings allow engineers to fine-tune the protection curve.Specifications
| Brand | Square D |
|---|---|
| Part Number | NX361000 |
| Series | NX |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC |
| Frame Type | NX |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (4) 3/0 AWG - 600 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 3/0 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, Bell Alarm, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Solid State Trip Unit, Micrologic Series B, Non-Interchangeable Trip, True RMS Sensing |
Product FAQs
5 answersWhat type of panels are compatible with the NX361000?
This breaker features an I-Line style plug-in connection and is exclusively compatible with Square D I-Line panelboards and switchboards. It will not fit standard NQ, NF, or QO load centers.
What are the wire size requirements for the NX361000 lugs?
The terminal lugs accommodate four conductors per phase, accepting wire sizes from 3/0 AWG up to 600 kcmil. The lugs are rated for both aluminum and copper (Al/Cu) wire.
How does the LSI trip unit function on this breaker?
The electronic trip unit features adjustable Long-Time, Short-Time, and Instantaneous (LSI) settings. This allows engineers and panel builders to fine-tune the protection curve for precise selective coordination with other breakers in the electrical system.
Is the Square D NX frame still manufactured, or is there a direct replacement?
The NX frame is a legacy molded case circuit breaker. While it is still widely used to maintain existing infrastructure, new installations typically use the Square D PowerPact P-frame series (such as the PLA34100U33A) as the modern equivalent for 1000A I-Line applications.
Does the NX361000 require a separate mounting bracket for installation?
No. It utilizes a self-contained I-Line style plug-in connection that mounts directly onto the busbar of an I-Line panelboard or switchboard without requiring additional mounting hardware.
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