Square D HLA36150U31XAABCSJ 150A 3-Pole Circuit Breaker

Introducing the Square D HLA36150U31XAABCSJ 150A 3-Pole Circuit Breaker — a genuine Square D part designed to deliver dependable three-phase protection for demanding electrical panels. With a 150 A current rating and a 3-pole configuration, this breaker is built to guard large feeders, motors, and equipment in commercial, industrial, or heavy-residential settings. The part number HLA36150U31XAABCSJ is your assurance of direct compatibility with Square D panelboards that accept this model, ensuring reliable fit and consistent protection across your electrical system.

Key specifications

• Current rating: 150 A
• Poles: 3 (three-pole configuration for 3-phase circuits)
• Part number: HLA36150U31XAABCSJ
• Brand: Square D
• Type: 3-pole circuit breaker for three-phase protection

Why this breaker stands out

This 150A, three-pole Square D breaker is purpose-built for reliable overcurrent protection in systems that demand coordinated performance across all three phases. It’s designed to integrate seamlessly with compatible Square D panels, helping you maintain a clean, code-compliant protection scheme. The three-pole configuration provides synchronized switching across all phases, which is essential for protecting 3-phase equipment like motors, pumps, compressors, and HVAC systems from overloads and short circuits.

Ideal use cases

• Protect large 3-phase feeders in commercial or light-industrial panelboards
• Safeguard three-phase motors and equipment (pumps, conveyors, air handling units)
• Serve as a main or sub-feed protective device in compatible Square D installations
• Replacement for aging or worn breakers in panels that accept this exact model

Installation and safety considerations

• Ensure panel compatibility: this unit is designed for Square D panels that accept the HLA36150U31XAABCSJ
• Power-down procedures: shut off main power and discharge any stored energy before replacing or installing the breaker
• Wiring and torque: follow manufacturer specifications for conductor sizing and terminal torque to guarantee secure connections
• labeling and documentation: clearly label the protective device to simplify future maintenance and inspections

Whether you’re upgrading a legacy panel, replacing a failed unit, or configuring a new installation for reliable 3-phase protection, the Square D HLA36150U31XAABCSJ 150A 3-Pole Circuit Breaker brings precise current protection and coordinated phase control to your system. Its authentic Square D design and exact part number provide confidence that you’re selecting a component that’s built to perform with your existing protection strategy.