Schneider ElectricLJA36600U44X
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Square D LJA36600U31X Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Square D
LJA36600U31X
Molded Case Circuit Breaker
Brand
Square D
SKU
LJA36600U31X
Quantity
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Square D LJA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LJA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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, Communication Module |
|---|---|
| Accessories | Micrologic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Quantity
Square D LJA36600U31X - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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, Communication Module |
|---|---|
| Accessories | Micrologic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
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Description
Designed for heavy-duty applications, the Square D LJA36600U31X is a 600A, 3-pole MCCB. Part of the PowerPacT L-Frame family, it provides a 65kAIC rating at 480VAC. This unit installs into Square D I-Line panelboards and switchboards. The plug-on mounting style allows for fast, reliable connections. Protection is managed by an advanced MicroLogic 3.3 electronic trip unit. It features adjustable Long-Time and Instantaneous (LI) settings for superior coordination.Specifications
| Brand | Square D |
|---|---|
| Series | LJA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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, Communication Module |
|---|---|
| Accessories | Micrologic 3.3 Trip Unit |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
7 answersWhat enclosures is the LJA36600U31X compatible with?
This circuit breaker is built exclusively for Square D I-Line panelboards and switchboards. It utilizes an I-Line plug-on line connection and cannot be installed in standard unit-mount or load center enclosures.
How much I-Line bus mounting space does this PowerPact L-frame breaker require?
The LJA36600U31X requires 6 inches of available vertical mounting space on the panelboard or switchboard I-Line bus stack.
What does the U31X suffix indicate on this circuit breaker?
The U31X suffix identifies the factory-installed trip unit as a MicroLogic 3.3. This standard electronic trip unit provides adjustable Long-Time and Instantaneous (LI) protection settings for precise system coordination.
Can this 3-pole breaker be used on a single-phase system?
Yes, but with specific voltage limits. Square D PowerPact L-frame breakers with MicroLogic trip units are listed for single-phase applications only on 240VAC circuits. For these setups, any two poles can be used.
Does this trip unit provide ground-fault protection?
No. The included MicroLogic 3.3 trip unit offers only Long-Time and Instantaneous (LI) protection. If your installation requires ground-fault protection for equipment (GFPE), a different breaker with a MicroLogic 6.3 (LSIG) trip unit is required.
Is the LJA36600U31X rated for 100% continuous operation?
No, this is a standard 80% rated circuit breaker. In accordance with National Electrical Code (NEC) requirements, continuous loads should not exceed 80% of its 600A nominal rating, which is 480A.
How does the line-side connection work for this model?
The line side features standard I-Line plug-on jaws that push directly onto the bus stack of the panelboard. The breaker is then secured to the mounting pan using the integrated mounting foot, requiring no additional line-side cabling or hardware.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 2 reviews.
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- JBJeffrey B.Verified BuyerRated 5 out of 5 stars7/20/26Purchased breaker - Great experience
We recently needed to purchase a specialty breaker for a large commercial project. Zach, our account manager sprung into action and really made this a white glove experience. From communication to speed I was impressed the entire process. Will definitely be using super breakers for our future breaker needs. Would 1500% recommend!
- KPKevin P.Rated 4 out of 5 stars11/1/21Easy to order
fast shipping good condition