Square D HDA36150U31XAABC 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36150U31XAABC, a purpose-built circuit breaker designed to protect three-phase electrical installations. With a 150 A current rating, 3 poles, and a 600 V maximum voltage, this device provides reliable, coordinated protection for demanding industrial and commercial systems. Part number HDA36150U31XAABC identifies the exact model, ensuring easy ordering and replacement in maintenance workflows.

Key specifications

• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36150U31XAABC
• Brand: Square D

Why this 3-pole, 600 V breaker matters

In three-phase systems, a 3-pole breaker interrupts all phases simultaneously, helping prevent phase imbalance and protecting both conductors and connected equipment. The 600 V rating expands your capability to protect higher-voltage equipment and feeders commonly found in industrial or large commercial setups.

Ideal use cases

• Protection for three-phase motor circuits and feeders in manufacturing lines
• Distribution panels and service feeders in commercial facilities
• HVAC equipment power circuits and large pumps or compressors
• Retrofits or replacements in existing Square D installations

How it fits into your electrical protection strategy

Choosing the right 150 A three-pole breaker ensures quick, reliable disconnection during overloads or short circuits, helping to minimize downtime and equipment damage. This model integrates into Square D ecosystems, reducing compatibility concerns when pairing with other Square D components and standard distribution panels.

Practical tips

• Verify the panel's compatibility with HDA36150U31XAABC before replacement or installation.
• Ensure conductors and enclosure spaces are sized for 150 A protection and three-pole configuration.