LXL36300G - 300 Amp Circuit Breaker

LXL36300G - 300 Amp Circuit Breaker

The LXL36300G Molded Case Circuit Breaker by Schneider Electric / Square D is engineered to protect large electrical systems where reliability and safety are vital. With a 300 A continuous rating and support for voltages up to 600 V AC, it delivers dependable overcurrent protection in industrial, commercial, and mission-critical installations. It’s designed to respond quickly to overloads and short circuits, helping you safeguard your equipment, reduce downtime, and maintain operational continuity.

Key Features and Benefits

• High Capacity Protection: Rated at 300 amps and capable of operating at up to 600 V AC, this breaker is suited for circuits with heavy loads.
• Strong Fault Clearing Ability: Supports an interrupting (AIC) rating of up to 65 kA at 480 V, enabling the breaker to handle high fault currents safely.
• Three-Pole Configuration: Provides balanced protection across three phases, ideal for three-phase power systems.
• Feed-Thru Design: Allows downstream circuits to draw power from the breaker without additional junctions.
• Thermal-Magnetic Trip Unit: Combines overload (thermal) protection and instantaneous (magnetic) trip action for precise response under diverse fault conditions.
• Wide Operating Temperature Range: Reliable performance from –25 °C to 70 °C (–13 °F to 158 °F), so it holds up even under challenging ambient conditions.
• Solid Build Quality: Designed for industrial use where durability, stable performance, and long life are expected.

Technical Specifications

• Current Rating: 300 A
  
• Voltage Rating: Up to 600 V AC
  
• Poles: 3
  
• Interrupting Capacity: 65 kA at 480 V (consult datasheet for other voltages)
  
• Frame Type: L-Frame (feed-thru capable)
  
• Trip Technology: Thermal-Magnetic (LSIG type)
  
• Operating Temperature: –25 °C to 70 °C
  
• Mounting Type: Unit-mount (direct mounting capability)
  
• Lug Tightening Torque: ~275 lbf·in (≈31 Nm) recommended
  
• Weight: ~13.15 kg (≈29 lb)
  

Material Compliance and Certifications

• Environmental and Safety Standards: This breaker aligns with modern environmental and safety standards. It is built with compliance in mind for Schneider Electric’s Green Premium® program.
• California Proposition 65: The product includes the mandatory California Proposition 65 warning: it may expose users to DINP and DIDP, chemicals known to cause cancer or reproductive harm. Always follow applicable regulations and guidelines in your jurisdiction when installing or disposing of the unit.

Where It Works Best

• The LXL36300G is ideal for demanding industrial or commercial power distribution systems — for main service panels, subpanels, large motor feeder protection, or power center applications. It fits best in three-phase installations where upstream control and strong fault tolerance are required. Its feed-through design makes it especially useful in setups where downstream panels or loads draw power from the same breaker. If your system requires robust protection for high-current distribution lines, this unit is an excellent choice.