Square D HDA36100UA 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36100UA 100A 3-Pole 600 V Circuit Breaker — a rugged three‑pole protective device designed for reliable protection of 3‑phase electrical systems. With a 100 A current rating and a 600 V maximum, this breaker is built to safeguard feeders and motors in commercial and light industrial environments, helping prevent faults from escalating into outages.

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part/Model: HDA36100UA

Why this Square D solution stands out. The three‑pole configuration ensures simultaneous protection across all three hot conductors in a three‑phase circuit, which reduces imbalance risk and improves overall system safety. Designed to integrate with Square D panelboards and enclosures that accept HDA‑series breakers, it offers a straightforward, reliable replacement path for existing installations.

Ideal use cases:

• Protection for three‑phase motor loads and feeders up to 100 A in commercial or light industrial setups
• Replacement breaker in Square D panels where a 3‑pole, 600 V device is required
• Protection of 3‑phase distribution circuits in service entrances, machine rooms, and workshop environments

Practical notes:

• Ensure panel compatibility with HDA‑series breakers and verify labeling on your enclosure
• Follow the panel manufacturer’s installation guidelines for wiring and torque specifications
• Use this breaker for circuits operating at or below 600 V and within the 100 A capacity to maintain safe, reliable protection

For technicians and engineers who value dependable, brand‑trusted protection, the Square D HDA36100UA delivers a clear, purpose‑built solution for three‑phase systems. It’s the right choice when you need a precise, compatible 3‑pole, 600 V breaker that aligns with established Square D panels and electrical distributions.