Square D LLA36600U53X - 600 A, 3-Pole Plug-In Circuit Breaker | AmpState

Experience dependable branch circuit protection with the Square D LLA36600U53X – a 600 A, 3-pole plug-in molded case circuit breaker built to guard panelboards and loadcenters from overcurrent and short circuits. Available from AmpState, this unit combines fast installation with durable performance for demanding electrical environments.

• Fast plug-in connection for quick installation and effortless replacement, reducing service time and downtime.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying loads and ambient conditions, helping to prevent nuisance trips.
• OEM-compatible design matched to Square D load centers and panelboards to ensure proper fit, trip characteristics, and reliable operation.
• 3-pole configuration suitable for 3-phase circuits, with a robust 600 A rating for main feeders and large branch circuits.
• Rugged molded-case construction designed for residential, commercial, and light industrial applications where lasting protection matters.

The Square D LLA36600U53X is purpose-built for protecting distribution paths from overcurrent and short circuits. Whether you're upgrading an existing panel or provisioning a new installation, its plug-in design minimizes wiring complexity and simplifies maintenance, while the thermal-magnetic mechanism preserves protection accuracy across voltage fluctuations and fault conditions.

Technical snapshot

• Manufacturer: Square D
• Part Number: LLA36600U53X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 600 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for facilities that demand reliable, high-capacity protection in panelboards and loadcenters, the LLA36600U53X supports commercial spaces, light industrial facilities, and residential-adjacent electrical rooms. By pairing precise thermal-magnetic protection with a fast, field-friendly plug-in design, this breaker helps maintain uninterrupted service while simplifying upgrades and replacements. Choose this model when you need a proven 3-phase, 600 A solution that integrates smoothly with matching Square D equipment and your existing electrical infrastructure.