Square D HDA36150U44XAA 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36150U44XAA 150A 3-Pole 600 V Circuit Breaker—a purpose-built solution for reliable overcurrent protection in demanding 3-phase electrical systems. Designed to safeguard large feeders and three-phase equipment, this breaker delivers fast, predictable trip performance in environments up to 600 volts, helping prevent damage from overloads and faults.

Key specifications at a glance

• Part Number: HDA36150U44XAA
• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V

Why this breaker stands out

• Three-pole protection tailored for balanced safety across all phases in 3‑phase circuits, reducing the risk of phase-to-phase faults and equipment damage.
• High-capacity 150 A rating makes it suitable for main feeders or substantial branch circuits in commercial or light industrial panels.
• 600 V maximum rating expands compatibility with a wide range of industrial equipment, motors, and distribution feeders commonly found in warehouses, data centers, and manufacturing environments.
• Consistent Square D design language and compatibility across related components, helping you maintain a cohesive, easy-to-service electrical system.
• Durable construction built to withstand installation and service in active electrical rooms, panels, and enclosures.

Ideal use cases

• Protecting three-phase feeders that power large motors, compressors, or HVAC equipment in commercial or light industrial facilities.
• Serving as a main or subfeed protective device in 3‑phase distribution panels for data centers, factories, or processing lines.
• Replacing aging or failed breakers in Square D panel systems with a reliable, compatible 3-pole, 150 A solution.

Practical guidance for you

• Ensure panel and bus compatibility: this unit is designed to integrate with Square D panels and related components to maintain consistent protection and operability.
• Match the protection level to your load: use for circuits where three-phase protection and a 150 A capacity align with the demand and wiring configuration.
• Plan for maintenance and replacement: when faults occur or routine maintenance is due, having a like-for-like replacement part (HDA36150U44XAA) simplifies service and minimizes downtime.

For professionals seeking a dependable, industrial-grade solution that aligns with three-phase power distribution and higher voltage applications, the Square D HDA36150U44XAA 150A 3-Pole 600 V Circuit Breaker delivers clear, practical value. It’s a precise fit for protecting substantial three-phase loads while maintaining compatibility within your existing Square D infrastructure.