Square D HDA36100U43X - 100 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HDA36100U43X is a robust 100A, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for quick installs and reliable performance, this unit combines fast plug-in connections with a precision thermal-magnetic trip system to guard your electrical system against common fault conditions.

Why this Square D breaker stands out

• Fast plug-in connection for swift installation and easy field replacements, reducing downtime during maintenance or upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short-circuit events, helping to prevent wiring damage and equipment failure.
• 3-pole configuration ideal for 3-phase panelboards and load centers, ensuring balanced protection across all phases.
• 100A rating provides ample protection for common branch circuits in residential, commercial, and light industrial settings.
• Plug-in molded case design engineered for compatibility with matching OEM load centers and panelboards, streamlining replacements and retrofits.

Who this is for

Professionals upgrading or maintaining electrical distribution systems in homes, offices, retail spaces, and lightweight industrial facilities will appreciate the reliability and ease of use this breaker provides. If you’re updating a panelboard or adding protection for critical circuits, the HDA36100U43X offers a proven solution with OEM compatibility for peace of mind.

Technical and usage details

• Manufacturer: Square D
• Part Number: HDA36100U43X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical installation tips

• Inspect the panelboard or load center for compatible unit footprints before swapping in the HDA36100U43X to ensure a secure plug-in fit.
• Use the plug-in connection to minimize service interruptions during replacement and ensure a tight, reliable electrical connection.
• Pair with matching Square D OEM components to maintain system integrity and warranty alignment in residential or light commercial projects.