Square D HLA36125 - 125 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HLA36125 is a 125A, 600V, 3-pole plug-in molded case circuit breaker designed to shield your panelboards and load centers from overcurrent and short-circuit events with precision and ease. Built for dependable, field-ready protection, this unit blends fast installation with reliable, repeatable trip performance that you can trust under demanding electrical loads.

What makes the HLA36125 stand out

• Fast plug-in installation— designed for quick insertion and effortless replacement in compatible panelboards, minimizing downtime during upgrades or servicing.
• Thermal-magnetic trip unit— provides stable, repeatable protection by combining current-based thermal sensing with instantaneous magnetic response for swift short-circuit action.
• OEM-compatible design— engineered to pair seamlessly with matching Square D OEM load centers and panelboards, ensuring reliable fit and coordinated protection across the system.
• Industry-ready performance— ideal for residential, commercial, and light industrial applications where dependable 3-pole, 125A protection is required in 600V systems.

Technical snapshot

• Manufacturer: Square D
• Part Number: HLA36125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases and benefits

Whether you’re upgrading an aging panel or constructing a new installation, the HLA36125 delivers clear advantages:

• Panelboard and load center upgrades— swap in quickly to restore or improve protection without invasive rewiring.
• 3-phase systems— accurate 3-pole protection for balanced or moderately unbalanced loads commonly found in commercial equipment rooms and light industrial spaces.
• Routine service and maintenance— the plug-in design simplifies testing, replacement, and inventory management for service teams.
• Code-compliant protection— engineered to meet electrical code expectations for branch-circuit protection in mid- to high-amenity installations.

Installation & compatibility tips

• Confirm the breakout and bus assignment in your panelboard matches a 3-pole, plug-in configuration before installation.
• Pair this breaker with the corresponding Square D OEM load center or panelboard to ensure coordinated trip characteristics and warranty integrity.
• Use proper torque on lugs and verify secure seating in the plug-in interface to maintain reliable electrical contact and safe operation.
• Store and handle breakers in a clean, dry environment to preserve mechanism integrity and trip accuracy over time.

For professionals seeking durable, field-proven branch circuit protection in 600V, the Square D HLA36125 delivers concise performance, straightforward installation, and seamless integration with compatible panel systems—making it a dependable choice for reliable electrical protection in homes, offices, and small industrial facilities. Available through AmpState for quick access to trusted Square D components.