Square D LH36350 - 350 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Powerful, dependable, and ready for demanding electrical layouts, the Square D LH36350 350A, 600V, 3-Pole Plug-In Molded Case Circuit Breaker is engineered to protect your branch circuits in panelboards and load centers. Its fast plug-in connection means less downtime during installation or replacement, keeping your electrical distribution teams productive.

• Fast plug-in connection for quick installation and effortless future swaps, minimizing service interruptions.
• Thermal-magnetic trip unit delivers stable, repeatable overcurrent protection, responding to both sustained overloads and short-circuit events.
• 3-pole design ideal for three-phase systems, delivering synchronized protection across all phases.
• 350 A rating supports high-capacity branch circuits common in commercial and light industrial configurations.
• 600 V rating suitable for a wide range of commercial, industrial, and multi-volt applications.
• Plug-in molded case construction with OEM-compatible mounting ensures reliable fitment in matching Square D panels and panelboards.
• OEM panel compatibility—designed to work with matching Square D load centers, ensuring proper coordination and expected protection performance.

Technical snapshot

• Square D
• Part Number: LH36350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 350 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Plug-in
• Applications: Branch circuit overcurrent and short-circuit protection

Who should consider the LH36350?

This breaker is particularly well-suited for residential, commercial, and light industrial environments where large, three-phase loads—such as large HVAC equipment, pumps, motors, and distribution feeders—require reliable, modular protection. If you’re updating panelboards or stocking a service van with a capable, high-capacity MCCB that fits standard Square D systems, the LH36350 is a precise match.

Why this solution stands out

Unlike generic cutoff devices, the LH36350 is built to integrate seamlessly with Square D OEM load centers, preserving system coordination and protection performance. The fast plug-in design reduces installation time and simplifies future maintenance. The combination of a 350 A rating, 600 V capability, and a thermal-magnetic trip mechanism provides robust protection for demanding electrical layouts while keeping replacement and service straightforward for technicians.

Practical tips and best-use scenarios

• Use in panelboards where a high-current, three-phase branch circuit needs reliable protection with easy replacement paths.
• Pair with compatible Square D load centers to maintain proper trip coordination and panel labeling consistency.
• During installation, ensure the plug-in connection seats fully into the bus and verify torque and panel compatibility per manufacturer guidelines.
• For preventive maintenance, test the breaker’s trip function during routine inspections to confirm predictable performance under fault conditions.