Square D LLA36600U33X Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Quantity
Square D LLA36600U33X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the PowerPacT L-Frame series, this 600A breaker provides advanced LSI coordination via its integrated MicroLogic 3.3S trip unit. It mounts into standard I-Line panelboards and switchboards, serving as a modern replacement for legacy LC36600 and LI36600 models. With a robust 100kA interrupting rating at 480VAC, it ensures reliable current-limiting performance for demanding commercial and industrial electrical distribution systems.Specifications
| Brand | Square D |
|---|---|
| Part Number | LLA36600U33X |
| Series | LLA |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Amperage Range | 240-600A |
|---|
| Frame Type | LLA |
|---|---|
| Terminal Type | Lugs |
| For Use With | I-Line Panelboards, 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 | 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, Communication Module |
|---|---|
| Accessories | MicroLogic 3.3S Trip Unit, Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, True RMS Sensing, 80% Rated |
Product FAQs
8 answersWhat panelboards are compatible with the LLA36600U33X breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. The "A" in the LLA prefix indicates it features an I-Line style plug-in connection on the line side.
How do I decode the LLA prefix on this circuit breaker?
The first "L" indicates the PowerPacT L-Frame. The second "L" denotes the interrupting rating tier (125kA at 240VAC, 100kA at 480VAC, 50kA at 600VAC). The "A" specifies an I-Line plug-in connection.
What trip unit is included with the LLA36600U33X?
The "U33X" suffix indicates this breaker is equipped with a Micrologic 3.3S electronic trip unit. This solid-state trip unit provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) protection for advanced system coordination.
What wire sizes do the load-side lugs on the LLA36600U33X accept?
The standard mechanical lugs on this 600A breaker accept two 2/0 AWG to 500 kcmil aluminum or copper (Al/Cu) conductors per phase.
How is the LLA36600U33X installed in an electrical panel?
It features an I-Line plug-in connection on the line side that mounts directly onto the panelboard bus, while the load side uses traditional mechanical lugs for wire termination.
Can the LLA36600U33X replace older Square D 600A breakers?
Yes, PowerPacT L-Frame breakers like the LLA36600U33X serve as modern replacements for legacy Square D LC and LI frame breakers, such as the LC36600 and LI36600, in I-Line panels. Always verify physical space and busbar requirements before upgrading.
Is the LLA36600U33X rated for 80% or 100% continuous current?
The LLA36600U33X is a standard-rated breaker, meaning it is rated for 80% continuous current. It is not designed to carry its full 600A rating continuously for more than three hours.
Does the LLA36600U33X include ground fault protection?
No, the integrated Micrologic 3.3S trip unit provides LSI (Long-Time, Short-Time, Instantaneous) protection only. If your application requires equipment ground fault protection, you will need a breaker with an LSIG trip unit, such as a Micrologic 6.3.
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