Square D HGA36100U43X - 100 A, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HGA36100U43X, a 100 A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built to integrate seamlessly with matching OEM Square D load centers, this device delivers fast, reliable protection where you need it most.

• Fast plug-in connection for quick installation and effortless replacement, minimizing service downtime during panel upgrades or breaker swaps.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across varying loads and conditions, helping to prevent nuisance trips while safeguarding circuits.
• 3-pole design ideal for three-phase systems and multi-pole protection within residential, commercial, and light industrial panels.
• 100 A rating suits main feeders and high-current branch circuits, delivering robust protection for demanding electrical loads.
• OEM-compatible ensures smooth integration with Square D panelboards and load centers, preserving warranty alignment and system coordination.

This plug-in molded case circuit breaker is purpose-built to shield your electrical system from overloads and short circuits, reducing the risk of equipment damage and downtime. Its durable construction stands up to the demands of everyday use in service panels, subpanels, and retrofit projects.

Ideal use scenarios

• Upgrading or replacing breakers in existing Square D panelboards and load centers.
• Providing reliable protection for high-current branch circuits in residential remodels, commercial suites, or light industrial installations.
• Replacing a failed 3-pole breaker in a three-phase distribution system with a compatible plug-in unit for quick restoration of service.

Technical at-a-glance

• Manufacturer: Square D
• Part Number: HGA36100U43X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re equipping a new panel or upgrading an aging system, the HGA36100U43X delivers precise protection, quick serviceability, and OEM compatibility that professionals rely on. Choose this 3-pole plug-in breaker for confident performance in residential, commercial, and light industrial environments.