Square D HDA36150U44XAABC 150A 3-Pole 600 V Circuit Breaker

The Square D HDA36150U44XAABC is a high-capacity circuit breaker designed for demanding three-phase electrical systems. With a 150 A current rating, 3-pole configuration, and a 600 V maximum rating, this unit delivers robust protection for heavy feeders, motors, and downstream equipment in commercial and industrial panels.

Key specifications

• Part Number: HDA36150U44XAABC
• Brand: Square D
• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V

Why this Square D circuit breaker stands out

• Reliable three-phase protection tailored for commercial and light industrial panels that run on higher voltages
• Precise interruption capability to safeguard feeders, motors, and other critical equipment from overloads and short circuits
• Seamless compatibility with Square D distribution panels, helping maintain system integrity and simplified maintenance

Ideal applications and use cases

• Main or feeder protection in three-phase electrical systems up to 600 V
• Replacement or upgrade for existing Square D installations requiring a 150 A, 3-pole solution
• Protection for motor control centers and large 3-phase equipment in commercial spaces and light industrial facilities

Installation and safety tips

• Verify panel compatibility: ensure the enclosure accepts HDA-series 3-pole breakers with a 600 V rating
• Follow standard lockout/tagout procedures during replacement or maintenance
• Consult the panel’s documentation for torque specifications and mounting guidelines to ensure secure operation