Square D LCL36300 - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D LCL36300 - 300 A, 600 V, 3-Pole Circuit Breaker from AmpState. This molded case breaker is engineered to deliver dependable branch circuit overcurrent and short-circuit protection inside panelboards and loadcenters, making it a robust choice for demanding electrical distributions.

Overview

Designed around a compact molded case, the LCL36300 maximizes panel space while delivering precise protection. Its thermal-magnetic trip unit provides stable, repeatable response to both sustained overloads and rapid transient faults, helping to prevent nuisance tripping while safeguarding wiring and equipment.

Key Benefits

• Compact molded case design minimizes footprint inside panelboards and loadcenters, freeing space for additional circuits.
• Thermal-magnetic trip unit combines thermal overload sensing with magnetic instantaneous trip for reliable protection against overcurrent and short circuits.
• 3-pole configuration ensures coordinated protection across all three phases, which is essential for balanced loads and safe operation of 3-phase equipment.
• 300 A rating with a 600 V insulating capacity, tailored for higher-current branch circuits in commercial and light industrial settings.
• Direct compatibility with matching OEM loadcenters and panelboards, enabling smooth replacements and straightforward upgrades.
• Versatility across environments suitable for residential, commercial, and light industrial applications where reliable circuit protection is critical.

Technical Details

• Manufacturer: Square D
• Part Number: LCL36300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 300 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Applications & Compatibility

The Square D LCL36300 is purpose-built for protection where space is at a premium and reliability matters. It fits seamlessly into OEM loadcenters and panelboards designed for molded case breakers, making it an excellent upgrade or replacement option for existing 3-pole installations. Its 600 V rating broadens its suitability across commercial panels and certain industrial environments, while the 300 A capacity accommodates larger branch circuits without compromising protection accuracy.

Use Cases and Practical Scenarios

• Upgrading residential or light commercial panels that require a high-current, three-phase protective device for large feeders or equipment racks.
• Replacing aging or incompatible breakers in compatible Square D panelboards to maintain coordinated protection and labeling consistency.
• Distribution panels in small to mid-size facilities where space efficiency and reliable trip performance are critical for uptime.

Tips for Selection and Installation

• Confirm the panelboard or loadcenter's compatibility with thermal-magnetic molded case breakers and the specific LCL series.
• Verify that the 3-pole configuration matches the existing wiring scheme and that a coordinated protection strategy is in place for all phases.
• When replacing an old device, check the mounting and terminal torque requirements per Square D guidelines to ensure a secure connection.
• Plan for future expansion by selecting a breaker that aligns with your expected load growth while keeping a margin above current demand.

With the Square D LCL36300, you’re choosing a trusted, purpose-built solution for reliable overcurrent and short-circuit protection. Its compact form, precise thermal-magnetic trip, and compatibility with OEM loadcenters position it as a practical, long-term upgrade for diverse electrical installations. Available from AmpState for projects that demand dependable, field-proven performance.