Square D HJA36100U44XAABC 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HJA36100U44XAABC—a genuine, high-reliability circuit breaker designed to protect three-phase electrical systems. With a 100 A current rating and 3 poles, this unit provides solid, coordinated protection for your industrial or commercial panels, keeping your equipment safer from overloads and short circuits while maintaining steady operation.

Specifications at a glance

• Part Number: HJA36100U44XAABC
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V

Why this 3-pole, 600 V breaker is a smart choice

• Reliable three-phase protection: Designed to safeguard three-phase circuits, ideal for motor feeders, conveyors, HVAC gear, and other industrial loads where balanced protection matters.
• Clear compatibility within Square D ecosystems: Built to align with Square D panels and distribution systems, helping streamline panel upgrades and replacements.
• Strong, scalable protection: A 100 A rating provides robust protection for branch circuits and feeders that power mid-size industrial equipment, reducing the risk of damage from overloads.
• Max 600 V operation: Suitable for many commercial and light industrial power distribution scenarios that require higher voltage protection, enabling safer, more versatile installations.

Use cases and ideal applications

• Upgrading or replacing aging protection on three-phase motor circuits in manufacturing lines or packaging equipment.
• Protecting feeders to large HVAC units in commercial buildings or data centers where stable power distribution is essential.
• Installing in new or retrofit panels that require a genuine Square D component with a 3-pole, 600 V configuration.

Practical guidance for installation and operation

Ensure the system matches the breaker’s 100 A current rating and 600 V maximum. Verify panel compatibility and follow local electrical codes during installation. For ongoing reliability, perform routine inspections of terminal connections and ensure a proper torque as per the manufacturer guidelines.

Choose the Square D HJA36100U44XAABC when you need trustworthy, three-phase protection with a clear path to compatibility in Square D panel environments. It’s a precise, purpose-built solution for keeping industrial and commercial power flows safe, stable, and resilient.