Square D HJA36100U44XAABCSH 100A 3-Pole 600 V Circuit Breaker

The Square D HJA36100U44XAABCSH is a rugged three-pole circuit breaker engineered to safeguard your three‑phase power distribution. With a 100 A rating and a 600 V maximum, it delivers reliable overcurrent protection for feeders and motors in demanding industrial environments.

Key specifications at a glance

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36100U44XAABCSH

Why this 3‑pole breaker stands out

• Three‑phase protection: guarantees simultaneous disconnection of all three conductors during a fault, reducing risk to equipment and personnel.
• Specific compatibility: part number HJA36100U44XAABCSH ensures precise replacement in compatible Square D installations, helping maintenance teams avoid mismatches.
• Robust industrial suitability: designed to support standard industrial feeders and motor circuits that operate at up to 600 V, delivering dependable protection for intermediate and high‑load applications.

Ideal use cases

• Feeder protection for three‑phase motors in manufacturing lines, conveyors, and pumps
• Main or distribution protection within panelboards and switchgear in industrial facilities
• Electrical installations in data centers, HVAC systems, and large mechanical rooms where reliable 3‑phase protection is essential

Practical benefits and what it means for you

Installing this 100 A, 3‑pole 600 V circuit breaker helps prevent costly downtime by quickly isolating faults, protecting conductors and equipment, and enabling safer maintenance. Its three‑phase design minimizes unbalanced faults across phases, which can extend the life of motors and sensitive loads.

Careful sourcing and maintenance tips

• Keep part number HJA36100U44XAABCSH on hand when stocking spare breakers to ensure exact compatibility with your Square D protection scheme.
• During replacement, verify that the replacement device matches the existing system’s voltage and current ratings to maintain proper protection coordination.
• Regularly inspect for signs of wear or overheating and replace promptly to maintain system reliability.