Square D LH36125 - 125 A, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D LH36125 — a 125A, 3-pole plug-in molded case circuit breaker designed for dependable branch circuit protection in panelboards and load centers. Built for residential, commercial, and light industrial environments, this unit blends a fast plug-in connection with precise thermal-magnetic protection to keep electrical systems safe and running smoothly.

Why the LH36125 stands out

• Fast plug-in connection for quick installation and easy replacement in compatible Square D panels, minimizing downtime during upgrades or maintenance.
• Thermal-magnetic trip unit delivers stable, repeatable protection across temperature changes and fault conditions, helping prevent nuisance trips and equipment damage.
• 125A, 3-pole configuration ideal for 3-phase circuits and higher-current branch circuits in commercial or light industrial installations.
• Guaranteed compatibility with matching OEM load centers and panelboards, ensuring proper fit, electrical continuity, and reliable performance.
• Specifically designed for branch circuit overcurrent and short-circuit protection, interrupting fault currents quickly to safeguard wiring and connected equipment.

Technical snapshot

• Manufacturer: Square D
• Part Number: LH36125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Replacements in existing Square D panelboards/load centers that accept LH-series plug-in breakers, restoring reliable protection with minimal downtime.
• 3‑phase electrical installations in small to mid-size commercial spaces or light industrial facilities requiring robust protection for feeders and motors.
• New or retrofit projects where OEM compatibility and a precise 125A, 3-pole solution ensure consistent electrical performance.

With the Square D LH36125, you get a proven, plug-in protection solution that integrates seamlessly with your panel ecosystem. Its combination of a fast installation path, reliable thermal-magnetic protection, and OEM-compatible design helps you maintain safe, compliant electrical systems across diverse applications.