Square D HDA36100U43XAA 100A 3-Pole 600 V Circuit Breaker

Square D HDA36100U43XAA is a 100-amp, 3-pole circuit breaker designed for three-phase electrical systems up to 600 volts. This exact part number is purpose-built to fit compatible Square D panels, delivering reliable overcurrent protection where it’s needed most.

• Exact compatibility: part number HDA36100U43XAA ensures you’re selecting a genuine Square D replacement that matches mounting, terminals, and protective characteristics for three-phase installations.
• Three-pole protection for 3-phase systems up to 600 V AC: safeguards feeders, motors, and distribution circuits from overloads and short circuits.
• 100 A continuous rating: well-suited for mid-to-large load centers and feeder protection without compromising performance.
• Structured for straightforward installation: compact 3-pole design simplifies wiring in panelboards and switchgear, supporting durable, long-term operation in demanding environments.

Ideal use cases include manufacturing lines, HVAC and process cooling systems, pump stations, and data-center infrastructure where stable, predictable protection is essential. If you’re upgrading a panel that relies on Square D protection schemes, the HDA36100U43XAA ensures proper coordination and reliable circuit interruption without introducing compatibility concerns.

Why choose this model for your project? It provides a precise, genuine replacement within the Square D HDA family, preserving the original form factor, trip behavior, and electrical interface. By selecting the exact part, you minimize downtime, avoid mounting misfits, and maintain consistent protection across your 3-phase distribution network.

Compatibility and installation notes: verify that your panel accepts HDA-series breakers and that this 100 A, 3-pole, 600 V device matches the specifications required by your system. Keep the part number handy for ordering and refer to standard electrical safety practices during installation and maintenance.