Square D LLL36600U31X Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
Square D LLL36600U31X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Providing high-capacity circuit protection, the Square D LLL36600U31X is a 3-pole, 600A molded case circuit breaker. It belongs to the PowerPact L-Frame family and features a MicroLogic 3.3 electronic trip unit for adjustable long-time and instantaneous (LI) functions. Designed for unit-mount applications, this breaker installs into Square D switchboards, industrial control panels, and enclosures. It delivers a 100kAIC rating at 480V, true RMS sensing, and current-limiting capabilities.Specifications
| Brand | Square D |
|---|---|
| Part Number | LLL36600U31X |
| Series | LLL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 20kA @ 250VDC |
| Amperage Range | 200-600A |
|---|
| Frame Type | LLL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels, Enclosures |
| Wire Gauge | (2) 2/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | MicroLogic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Visual Trip Indicator, 80% Rated, Mercury Free, RoHS Compliant, PVC Free |
Product FAQs
8 answersWhat does the U31X suffix indicate on the LLL36600U31X?
The U31X suffix indicates that this breaker is equipped with a Micrologic 3.3 electronic trip unit, which provides adjustable long-time and instantaneous (LI) protection.
Can the LLL36600U31X be mounted on an I-Line panelboard?
No, the LLL36600U31X is a unit-mount, feed-thru circuit breaker designed for individual enclosures, switchboards, or control panels. It does not have the plug-on jaw connections required for I-Line panelboards.
How does the L in LLL36600U31X affect its short-circuit rating?
The second L in the catalog number designates the interrupting tier. In the PowerPacT L-frame series, the L-tier provides a high interrupting capacity of 100kA at 480VAC, making it suitable for systems with substantial available fault current.
Is the trip unit on the LLL36600U31X adjustable?
Yes, the Micrologic 3.3 electronic trip unit features adjustable dial settings for both long-time pickup and instantaneous trip thresholds, allowing for precise coordination with other protective devices in your system.
Does the LLL36600U31X provide ground fault protection?
No, the Micrologic 3.3 (LI) trip unit included with this breaker only provides long-time and instantaneous overcurrent protection. It does not include integral equipment ground fault protection.
What is the difference between the LLL36600U31X and the LGL36600U31X?
The difference lies in the interrupting rating. The LLL36600U31X features an L interrupting tier rated for 100kA at 480VAC, while the LGL36600U31X has a G interrupting tier rated for 35kA at 480VAC. Both share the same 600A frame and Micrologic 3.3 trip unit.
What is the difference between the LLL36600U31X and the LJL36600U31X?
The LLL36600U31X has an L interrupting tier rated for 100kA at 480VAC, whereas the LJL36600U31X features a J interrupting tier rated for 65kA at 480VAC.
What applications are suitable for the LLL36600U31X breaker?
This 600A unit-mount breaker is commonly used as a main or feeder breaker in Square D switchboards, motor control centers, and industrial control panels where a solid-state electronic trip is required.
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