Square D HDA36100UJ 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36100UJ, a purpose-built circuit breaker engineered for demanding 3-phase electrical systems. Rated at 100 A and 600 V, this 3-pole device delivers synchronized protection across all phases, helping prevent overload-induced damage and minimize downtime in industrial environments.

Key specifications

• Part Number: HDA36100UJ
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V

Ideal applications

• Three-phase distribution panels in industrial facilities and large commercial systems
• Motor and equipment feeders up to 600 V
• Primary service disconnects where reliable phase protection is required

Why this matters

The 3-pole design ensures simultaneous interruption of all conductors in a three-phase circuit, reducing the risk of unbalanced voltages and equipment damage during faults. With a 100 A rating, it provides robust protection for high-demand feeders while allowing precise protection coordination with other protective devices in the panel. Built to perform in real-world electrical environments, this Square D breaker supports quick replacement and straightforward integration into compatible Square D or standard 3-pole 600 V installations.

Practical tips for use

• Verify your panel's compatibility with HDA36100UJ before installation to ensure proper fit and terminal configuration.
• When wiring, follow all local electrical codes and use appropriate torque for terminations to maintain secure connections.
• Pair with appropriate upstream protection to achieve selective coordination and minimize component downtime.