Square D HJA36100U31X - 100 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HJA36100U31X — a 100 A, 600 V, 3-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built by Square D, this plug-in breaker is engineered for quick installations and straightforward replacements in residential, commercial, and light industrial electrical environments.

• Fast plug-in connection — enables rapid installation or replacement, minimizing downtime when upgrading panelboards or performing maintenance.
• Thermal-magnetic trip unit — provides stable, repeatable protection by combining overload sensing with instantaneous short-circuit interruption, helping to prevent nuisance trips and gear damage.
• 3-pole design, 100 A, 600 V — suitable for three-phase configurations and higher-voltage applications, delivering comprehensive protection across multiple conductors.
• OEM-compatible — designed to work with matching Square D load centers and panelboards, ensuring proper fit, coordination, and performance without adapters.
• Versatile application — ideal for residential service equipment, commercial electrical panels, and light industrial distribution where dependable branch-circuit protection is essential.

Technical specifications

• Manufacturer: Square D
• Part Number: HJA36100U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why choose this breaker for your panel setup? It combines a fast, tool-efficient plug-in installation with a protective mechanism you can rely on in demanding environments. The thermal-magnetic trip unit delivers predictable response to overloads and short circuits, helping to safeguard wiring, equipment, and occupants. With its 600 V rating and 3-pole design, it’s well-suited for modern panelboards and load centers that require robust, multi-conductor protection.

If you’re upgrading existing equipment or equipping a new installation, the Square D HJA36100U31X 100 A, 600 V, 3-pole plug-in molded case circuit breaker from AmpState offers precise protection, easy replacement, and OEM compatibility—so you can count on consistent performance day after day.