Square D HDA36100U53X - 100 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HDA36100U53X — a robust 100 A, 600 V, 3-pole plug-in molded case circuit breaker engineered for reliable branch-circuit protection in panelboards and load centers.

Fast, tool-friendly installation: The plug-in design snaps into compatible Square D panelboards, enabling quick replacement and minimizing panel downtime. Its compact molded-case form factor fits standard electrical enclosures while preserving space for other breakers.

Stable protection you can count on: The thermal-magnetic trip unit delivers precise, repeatable protection across temperature variations and fault types. This means fewer nuisance trips and consistent performance when circuits are under load or shorted, safeguarding conductors and connected equipment.

OEM-matching compatibility: Built to work with matching Square D OEM load centers and panelboards, ensuring a secure fit and reliable electrical connection. Ideal for remodels, service upgrades, or new installations where panel compatibility matters.

Versatile for multiple environments: Suitable for residential, commercial, and light-industrial applications where a 3-pole, 100-amp breaker is needed to safeguard 3-phase or 3-wire circuits in 600 V systems.

What it does for your electrical system

• Prevents overloads and short circuits on branch circuits by interrupting excess current quickly and safely.
• Delivers coordinated protection with other breakers in the same panel, helping maintain electrical system stability during faults.
• Supports quick service and replacement workflows in maintenance and upgrade projects due to its plug-in design.

Technical snapshot

• Manufacturer: Square D
• Part Number: HDA36100U53X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 600 V
• Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for best results

• Ensure your panelboard or load center is designed for a plug-in, 3-pole 100 A device and compatible with the HDA36100U53X family.
• Verify that the surrounding circuits match the trip characteristics (thermal-magnetic) to maintain coordinated protection across your panel.
• When replacing an older breaker, power down the panel and ensure the hot bus stabs align with the breaker terminals for a secure snap-in connection.