Square D HJL36100M73AABC 73A 3-Pole 600 V Circuit Breaker

Introducing the Square D HJL36100M73AABC 73A 3-Pole 600 V Circuit Breaker—the precise, reliable overcurrent protection your three-phase electrical system requires. With a 73 A current rating and three poles, this breaker is built to safeguard feeders and equipment in commercial and light industrial panels operating up to 600 volts.

Specifications at a glance

• Part Number: HJL36100M73AABC
• Brand: Square D
• Current Rating: 73 A
• Poles: 3
• Voltage Rating: 600 V

What makes this breaker stand out

Designed to pair with Square D panels and distribution equipment, the HJL36100M73AABC delivers consistent, coordinated protection for three-phase circuits. Its 3-pole configuration ensures balanced interruption across all phases, reducing the risk of unbalanced faults that can stress motors and feeders. The 600 V rating makes it suitable for a range of commercial and industrial applications where reliable trip performance is essential.

Ideal use cases

• Three-phase feeder protection for commercial building power distribution
• Motor circuit protection in manufacturing or processing facilities
• Branch circuit protection for large equipment operating near the 600 V class

Why choose this Square D breaker over alternatives

This device isn’t a generic fit. It’s a purpose-built component in the Square D family, designed to deliver predictable trip behavior and compatibility with Square D panels and accessories. The 73 A rating targets medium-duty circuits, providing precise protection without unnecessarily interrupting service. By selecting a genuine Square D part, you align with established reliability, simplified panel maintenance, and easier replacement or upgrades within the same system architecture.

Compatibility and installation tips

• Ensure your panel or distribution board is designed to accept Square D 3-pole breakers of this rating and type.
• Verify the voltage requirements of the circuit and confirm the 600 V category matches your installation.
• When replacing an existing breaker, confirm the trip characteristics and mounting type align with the HJL36100M73AABC for a secure fit.
• Consult a qualified electrician to verify proper sizing, wiring, and compliance with local electrical codes.

In short, the Square D HJL36100M73AABC 73A 3-Pole 600 V Circuit Breaker is a purpose-built solution for protecting three-phase systems up to 600 volts. With its specific current rating, three-pole design, and brand-accurate compatibility, it’s a practical, reliable choice for maintaining safe, uninterrupted power in demanding commercial and industrial environments.