Square D HDA36100U31X - 100 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Designed to deliver dependable branch circuit protection in panelboards and load centers, the Square D HDA36100U31X is a 100 A, 600 V, 3-pole plug-in molded case circuit breaker built for fast, reliable service in residential, commercial, and light industrial settings. Its plug-in design simplifies installations and replacements, keeping downtime to a minimum while maintaining robust protection across your electrical system.

• Fast plug-in connection for quick installation and straightforward replacement, reducing both labor time and service interruptions.
• Thermal-magnetic trip unit provides stable, repeatable overcurrent and short-circuit protection, adapting to varying loads and preventing nuisance trips in normal operation.
• 3-pole configuration ideal for 3-phase systems, supporting balanced protection in commercial panels and light industrial machinery.
• OEM-compatible designed to pair with matching Square D load centers and panelboards, ensuring seamless integration with existing equipment.
• Rugged molded case construction built to withstand the rigors of everyday electrical environments while delivering reliable performance over time.
• Versatile applications suitable for residential, commercial, and light industrial applications requiring solid branch circuit overcurrent and short-circuit protection.

What makes this breaker stand out

Beyond basic specs, the HDA36100U31X emphasizes practical reliability. The thermal-magnetic trip unit combines predictable thermal response with magnetic instantaneous protection, so you get consistent performance under a range of fault conditions. The plug-in mounting simplifies servicing in crowded panels, and its 3-pole design supports modern three-phase layouts without compromising simplicity or safety. When paired with the right OEM panel, you gain a cohesive protection strategy across your electrical distribution system.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: HDA36100U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and practical considerations

Whether you're wiring a commercial office building, a light industrial outlet, or upgrading a residential panel, this breaker provides reliable protection for critical circuits. Use it in conjunction with compatible Square D panelboards to maintain a unified protection scheme. When installing, ensure compatibility with your OEM load center, follow manufacturer torque specifications for terminations, and verify proper alignment for a secure plug-in connection. If a trip occurs, inspect the connected load and conductors for overloads or short circuits, then reset or replace the breaker as needed to restore safe operation.

Who benefits most

• Electrical contractors performing panel upgrades or replacements on commercial or light industrial sites
• Facilities managers maintaining consistent, code-compliant protection across multiple panels
• Homebuilders and electricians wiring 3-phase or multi-circuit residential/commercial installations

Choose the Square D HDA36100U31X for a trusted, OEM-compatible plug-in solution that combines quick installation with dependable thermal-magnetic protection. It’s the practical, high-performance choice for safeguarding your electrical distribution—now available from AmpState.