Square D NXL361200 Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Square D NXL361200 - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for robust power distribution, the Square D NXL361200 is a 1200A, 3-pole molded case circuit breaker. It features a Micrologic Series B solid-state trip unit with adjustable LSI protection. This unit mount breaker includes lugs for standard Square D switchboards. When replacing with the newer PLL34120U31A, note that the 600V interrupting capacity decreases from 65kA to 25kA. Delivering 100kAIC at 480V and true RMS sensing, it ensures reliable performance for complex systems.Specifications
| Brand | Square D |
|---|---|
| Series | NXL |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC |
| Frame Type | NXL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Enclosures |
| 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, Undervoltage Release, Alarm Switch, Rating Plugs |
|---|---|
| Accessories | Line and Load Lugs Included |
| 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, Micrologic Series B, Non-Interchangeable Trip |
Product FAQs
8 answersWhat type of trip unit is installed in the Square D NXL361200?
The NXL361200 features a solid-state Micrologic electronic trip unit. It provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) trip functions for precise overcurrent protection and system coordination.
What wire sizes are compatible with the standard lugs on the NXL361200?
The factory lugs accept four conductors per phase, accommodating either aluminum or copper wire ranging from 3/0 AWG to 600 kcmil.
How is the NXL361200 circuit breaker mounted?
This is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the mounting pan or framework inside Square D switchboards and enclosures, rather than plugging into a busbar system.
What is the modern replacement for the legacy NXL361200 circuit breaker?
The N-frame is a legacy series. For modern upgrades or new installations requiring a 1200A Square D breaker, the PowerPact P-frame series is the current replacement family.
Does the NXL361200 require a rating plug?
Yes, the Micrologic trip unit on this breaker requires an interchangeable rating plug to establish the maximum continuous current. It typically uses the ARP100 rating plug for 1200A operation.
Can the NXL361200 be used on a 240VAC system?
Yes, while it has a maximum voltage rating of 600VAC, it is fully compatible with 240VAC systems, where it provides a higher interrupting rating of 125kAIC.
What auxiliary switches are compatible with the NXL361200?
This breaker accepts standard N-frame internal accessories. For example, the Square D NA11212 auxiliary switch is compatible with the NXL frame for remote status indication.
What does the NXL frame designation indicate?
The NXL designation indicates a Square D N-frame molded case circuit breaker with an extra-high interrupting capacity, specifically rated to handle up to 100kAIC at 480VAC.
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