Square D HDA36110 - 110 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HDA36110, a rugged 110 A, 600 V, 3-pole plug-in molded case circuit breaker designed to protect your critical electrical circuits in panelboards and load centers.

Engineered for fast, reliable service life, this unit uses a fast plug-in connection that minimizes downtime during installation or replacement, keeping your electrical system up and running with minimal disruption.

Its thermal-magnetic trip unit delivers stable, repeatable protection by responding quickly to overcurrent and short-circuit events, helping prevent damage to wiring and connected equipment while allowing for coordinated tripping with adjacent devices in the same panelboard.

Built to fit with matching OEM load centers and panelboards, the HDA36110 ensures a snug, code-consistent fit that technicians trust in new builds and retrofit projects alike.

Key specifications

• Amperage rating: 110 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Type: Thermal-magnetic molded case circuit breaker
• Manufacturer: Square D
• Part number: HDA36110
• Application: Branch circuit overcurrent and short-circuit protection

Who is this for? Electrical professionals and facility managers who need dependable protection for large or multi-circuit installations in residential, commercial, and light industrial settings. Whether you're upgrading a panelboard, expanding a service, or replacing a failed breaker, the HDA36110 provides a robust, reliable solution for demanding environments.

Use cases in practice: - Retrofit and replacement in existing panelboards where 3-pole, 600 V service is required - Protection of three-phase feeders in light industrial equipment - New-construction panelboards that require compatible, OEM-mated plug-in breakers

Why choose this over generic breakers? The combination of a fast plug-in connection, a thermal-magnetic trip unit, and OEM compatibility reduces installation downtime, improves protection coordination, and simplifies future servicing. This is not a generic off-brand breaker; it’s designed to fit and perform with Square D load centers and panelboards, delivering predictable protection and long-term reliability.

Practical tips: - Verify that your panelboard requires a 3-pole 600 V device and 110 A rating before installation - Pair with matching Square D OEM load centers to ensure alignment of trip curves and mechanical fit - Schedule periodic visual inspections to confirm connectors remain clean and free of corrosion or damage, and test tripping behavior during routine maintenance checks