Square D LI36300 - 300 A, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D LI36300—a robust 300 A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to endure the demands of residential, commercial, and light industrial environments, this breaker balances fast installation with reliable protection when it matters most.

• Fast plug-in connection enables quick installation and effortless replacement in existing panelboards, reducing downtime during upgrades or service calls.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overcurrent and short circuits, helping to prevent nuisance trips and ensuring predictable system performance.
• 3-pole configuration suits 3-phase systems and common-trip setups, making it ideal for larger branch circuits and service equipment.
• 300 A rating provides strong protection for high-current feeders and main lines where reliability is essential.
• OEM-compatible design is purpose-built to pair with matching Square D load centers and panelboards, ensuring proper fit, coordination, and long-term reliability.
• Versatile applications ready for a range of installations in residential, commercial, and light industrial settings requiring solid overcurrent and short-circuit protection.

Technical specifications

• Manufacturer: Square D
• Part number: LI36300
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 300 A
• Poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Square D LI36300 means prioritizing reliable protection, straightforward maintenance, and seamless compatibility with your panelboard ecosystem. Its plug-in design simplifies upgrades and service, while the thermal-magnetic trip unit provides dependable, consistent protection for critical electrical processes in homes and small to mid-size facilities. For technicians and facility managers, this breaker offers a practical, long-term solution for high‑current, high‑demand circuits in panelboards and load centers.