Square D LH36175 - 175 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D LH36175 is a 175 A, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and load centers. With a fast plug-in connection, it makes installation and replacements quick and straightforward, minimizing downtime on critical electrical runs. Its thermal-magnetic trip unit provides stable, repeatable protection against overloads and short circuits, helping maintain consistent performance under varying load conditions.

Key advantages that set this breaker apart

• Rapid plug-in connection: Simplifies installation and future service, reducing labor time and interruptions.
• Thermal-magnetic protection: Combines overload protection (thermal) with short-circuit protection (magnetic) for reliable, coordinated tripping across all poles.
• High-current capability: 175 A rating supports substantial branch circuits and feeder protection in larger panels.
• Three-pole design: Ideal for 3-phase systems and multi-wire feeder applications common in commercial and light industrial environments.
• OEM-compatible: Designed to be compatible with matching Square D OEM load centers and panelboards for seamless integration and predictable performance.
• Versatile application: Suitable for residential, commercial, and light industrial electrical systems requiring dependable protection and easy maintenance.

Technical snapshot

• Manufacturer: Square D
• Part number: LH36175
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 175 A
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Use the LH36175 when upgrading or maintaining panelboards and load centers that require robust, high-capacity protection for large branch circuits or feeders. It’s well-suited for commercial environments with three-phase power needs and for residential projects that demand a reliable, easy-to-replace protection device in main distribution panels. Its plug-in design makes routine replacements faster and safer, so downtime is minimized during maintenance or panel upgrades.

Practical considerations and tips

• Pair this 175 A, 3-pole plug-in breaker with the corresponding Square D load centers to ensure optimal mechanical fit and electrical coordination.
• When replacing an existing breaker, verify that the panelboard supports plug-in MCCBs of this rating and pole count to maintain system protection coordination.
• Use in applications where quick swap-out capability reduces service interruption, such as facilities with regular maintenance windows or critical equipment feeds.