Square D HDA36100U33X - 100 A, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HDA36100U33X — a 100 A, 3-pole plug-in molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to simplify installations and drive uptime, this unit is a practical, reliable choice for a wide range of electrical setups from homes to light commercial sites.

• Fast plug-in connection — streamline installation and replacements with a quick-connect design that minimizes field labor and downtime.
• Thermal-magnetic trip unit — delivers stable, repeatable protection by combining temperature-based overload sensing with magnetic trip action for short-circuit events.
• 3-pole design — ensures simultaneous disconnection of all three conductors, ideal for three-phase systems and multi-pole circuits that require coordinated protection.
• OEM panel compatibility — purpose-built to fit and coordinate with matching Square D OEM load centers and panelboards for reliable electrical performance.
• Versatile applications — well-suited for residential service upgrades, light commercial power distribution, and protection of equipment like motors and HVAC circuits.

Use cases span protecting main feeders in service panels, branch circuits for HVAC equipment, pumps, lighting, and small machinery — where a robust 3-pole solution ensures safe, dependable operation across peak and off-peak loads. The 100 A rating provides strong feeder protection, while the plug-in format supports rapid service changes without extensive panelwork.

Technical specifications

• Manufacturer: Square D
• Part number: HDA36100U33X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Designed to deliver reliable protection when it matters most, the HDA36100U33X combines quick installation with precise, coordinated trip response. Pair it with compatible Square D panelboards to ensure optimal system protection and easy future upgrades.