Square D HJA36150U31XAABCSD 150A 3-Pole 600 V Circuit Breaker

Square D HJA36150U31XAABCSD is a robust 150 Amp, 3-Pole circuit breaker engineered for demanding three-phase power systems up to 600 V. Built to protect your critical equipment from overloads and faults, this unit integrates smoothly with Square D panelboards and enclosures, delivering dependable protection where it matters most.

Ideal for industrial and commercial environments, this 150A circuit breaker defends three-phase feeders, motors, pumps, and large electrical loads. With a 3-pole design, it interrupts all three phases simultaneously, ensuring balanced protection across your distribution network and helping prevent faults from propagating through the system.

Key specifications

• Part Number: HJA36150U31XAABCSD
• Current Rating: 150 A
• Poles: 3
• Voltage Rating: 600 V

Why it stands out

• Three-phase protection: Perfect for three-wire, 3-phase systems common in manufacturing, data centers, and large facilities.
• Reliable Square D engineering: Designed for seamless compatibility with Square D panels and bus stabs, reducing installation guesswork and ensuring a secure fit.
• Predictable, dependable protection: Engineered to respond to overloads and faults in a controlled manner, helping minimize downtime and damage to downstream equipment.
• Rugged durability for industrial environments: Built to withstand the temperature and vibration common in busy facilities, delivering durable performance over time.

Common use cases include protecting large motors and compressors, three-phase power feeders for manufacturing lines, HVAC distribution, and critical infrastructure in warehouses and data centers. If you’re stocking spares or upgrading an existing Square D system, this HJA36150U31XAABCSD model provides a reliable, drop-in fit with similar form factor and mounting pattern for a smooth replacement process.

Tip: Always verify panel compatibility and trip characteristics with your installation manual and the applicable electrical codes. For new installations, plan for future load growth by selecting a breaker with ample headroom above continuous load ratings.

In short, the Square D HJA36150U31XAABCSD 150A 3-Pole 600V Circuit Breaker combines proven reliability, genuine three-phase protection, and seamless integration into Square D electrical systems—making it a solid choice for safeguarding your most critical equipment.