Square D HDA36090SLYP 90A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36090SLYP 90A 3-Pole 600 V Circuit Breaker—the trusted choice for reliable overcurrent protection in three-phase electrical systems. Built to handle demanding commercial and industrial environments, this breaker delivers precise protection for your downstream equipment and wiring while fitting seamlessly into standard Square D panels.

• Current rating: 90 A
• Poles: 3
• Voltage rating: 600 V
• Brand: Square D
• Part number: HDA36090SLYP

Why this breaker stands out

• Three-pole design for coordinated protection—simultaneous disconnection of all three phases enhances safety and helps prevent damaging arc faults in 3-phase systems.
• Industry-standard reliability—Square D components are built for consistent performance, making maintenance and panel upgrades more straightforward.
• Clear, traceable specifications—the HDA36090SLYP is purpose-built to meet 90 A protection needs while supporting 600 V distribution environments.

Ideal use scenarios

• Three-phase feeders in commercial buildings and light industrial facilities requiring dependable overcurrent protection.
• Replacement or upgrade scenarios where a 90 A, 3-pole, 600 V breaker is specified for compatibility with existing Square D panels.
• New installations in systems operating at up to 600 V where precise, rapid trip protection minimizes downtime and equipment wear.

How it helps you manage electrical safety and uptime

By stopping fault currents before they cascade, this breaker protects transformers, motors, drives, and wiring from insulation damage and overheating. The 3-pole construction ensures that if a fault occurs, all phases are independently isolated, reducing the risk of partial energization and improving fault clearing performance. For facilities managers and electricians, using a proven Square D component simplifies maintenance planning and supports long-term reliability.

Designed with the exacting standards you expect from Square D, the HDA36090SLYP is a straightforward, dependable solution for protecting medium to high-demand three-phase circuits. Whether you’re outfitting a new panel or replacing an aging breaker, this 90 A, 3-pole, 600 V model delivers the right balance of protection, compatibility, and peace of mind.