Square D HJA36110 - 110 A, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D HJA36110, a 110 A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed for fast installation and seamless replacements, this unit delivers reliable protection across residential, commercial, and light industrial applications.

• Fast plug-in connection — reduce downtime during installation or service calls with a straightforward, tool-friendly plug-in mount.
• Thermal-magnetic trip unit — combines a precise thermal element with a rapid magnetic trip for stable, repeatable protection under varying loads.
• 3-pole design, 110 A rating — ideal for multi-phase circuits, ensuring balanced protection across all phases in the panel.
• Plug-in mounting — engineered to integrate smoothly with matching OEM load centers and panelboards for clean, reliable retrofits or new builds.
• Versatile applications — trusted choice for residential panels, commercial electrical rooms, and light industrial installations that demand dependable circuit protection.

Why the HJA36110 stands up to real-world use

This plug-in molded case circuit breaker is built to deliver predictable performance when you need it most. The thermal-magnetic trip mechanism responds to overloads with a controlled, non-nysterious trip curve while the magnetic element handles short circuits with speed, helping protect wiring, components, and equipment from damage. In practice, that means fewer unexpected trips, easier troubleshooting, and greater system uptime.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJA36110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading or maintaining panelboards and load centers where downtime must be minimized.
• New installations in offices, retail environments, or light manufacturing facilities requiring robust, predictable protection.
• Residential subpanels and multi-wire branch circuits that need coordinated, multi-pole protection.