Square D LLA36600U44X Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Quantity
Square D LLA36600U44X - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Rated for 100kA at 480VAC, this PowerPacT L-Frame breaker features a MicroLogic 6.3A trip unit for precise LSIG coordination and current monitoring. Designed for seamless integration into I-Line panelboards, it effectively replaces older LC36600 and LI36600 units. The inclusion of adjustable ground-fault protection and true RMS sensing makes it ideal for complex industrial applications requiring strict power management and safety compliance.Specifications
| Brand | Square D |
|---|---|
| Part Number | LLA36600U44X |
| 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 | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Trip Unit Model | Ammeter |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Communication Module |
|---|---|
| Accessories | MicroLogic 6.3A 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 type of panelboards are compatible with the LLA36600U44X?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a specialized plug-in jaw connection on the line side that mounts directly to the I-Line bus assembly.
Can I install this breaker in a standard NQ or NF panelboard?
No. The LLA36600U44X requires an I-Line bussing system. It will not fit in standard QO, NQ, or NF series panelboards.
What does the 'U44X' in the catalog number indicate?
The 'U44X' suffix designates that the breaker is equipped with a Micrologic 6.3 A electronic trip unit configured for LSIG protection, which includes Long-time, Short-time, Instantaneous, and Ground-fault functions.
What does the 'A' in the Micrologic 6.3 A trip unit signify?
The 'A' indicates that the trip unit includes an integrated ammeter. This allows for real-time current monitoring and measurement directly at the breaker face.
How are the line and load connections configured on this breaker?
The line side utilizes a plug-in I-Line connection for direct mounting to the panel bus, while the load side is equipped with mechanical lugs for terminating your load wires.
Can the trip settings be adjusted on the LLA36600U44X?
Yes. The electronic Micrologic trip unit allows for precise adjustments of the pickup and delay settings for the long-time, short-time, instantaneous, and ground-fault parameters to coordinate with your specific system requirements.
Does the LSIG trip unit provide personnel ground-fault protection?
No. The ground-fault function in the Micrologic 6.3 A trip unit provides equipment ground-fault protection (GFPE) to prevent equipment damage. It does not provide Class A personnel protection (GFCI).
Is an external neutral current transformer required for this breaker?
If you are utilizing the ground-fault protection feature on a 3-phase, 4-wire system, an external neutral current transformer (NCT) is required to accurately monitor the neutral current and prevent nuisance tripping.
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