Square D HLA36100 - 100 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HLA36100 is a 100 A, 600 V, 3-pole plug-in molded case circuit breaker designed to protect panelboards and load centers with precision and speed. Built for dependable branch circuit overcurrent and short-circuit protection, this unit integrates seamlessly into compatible Square D ecosystems, making new installations and upgrades straightforward and reliable.

Fast, hassle-free installation and replacement

Plug-in connection allows quick seating into compatible panelboards, reducing installation downtime and simplifying future replacements. When service needs arise, you can swap in the HLA36100 without complex rewiring or backbox adjustments, keeping downtime to a minimum and system protection intact.

Thermal-magnetic protection you can trust

The thermal-magnetic trip unit delivers stable, repeatable protection against both overloads and short circuits. The thermal element responds to gradual current rise, while the magnetic element provides immediate clearing for high-energy faults, helping protect downstream equipment and maintain panel reliability in demanding environments.

Designed for OEM compatibility and versatile applications

Engineered to work with matching OEM load centers and panelboards, the HLA36100 minimizes compatibility concerns during retrofits or new builds. Its three-pole design makes it ideal for 3-phase systems common in commercial and light industrial settings, while also serving appropriate applications in residential panels that support 3-phase configurations.

Where this breaker shines

• Commercial electrical rooms requiring robust 3-phase protection for feeders and distribution circuits
• Light industrial environments with motors and equipment up to 100 A
• Residential or mixed-use panelboards that utilize plug-in, molded case protection for easy upgrades
• Retrofit projects where OEM compatibility and fast replacement are critical to uptime

Specifications at a glance

Practical tips for use and long-term reliability

• Confirm panel compatibility: ensure your load center or panelboard supports the Square D HLA36100 plug-in format and 3-pole configuration.
• Plan for quick replacements: keep a spare HLA36100 on hand for scheduled maintenance or rapid fault isolation to minimize downtime.
• Coordinate protection: pair this 100 A breaker with upstream and downstream protective devices that match the system’s voltage and current profiles to maintain proper selectivity and safety margins.
• Routine inspection: during periodic maintenance, verify the plug-in connections are fully seated and that the trip indicator indicates normal operation after a test trip.