Square D HDA36100SR 100A 3-Pole 600 V Circuit Breaker

The Square D HDA36100SR is a robust three‑pole circuit breaker designed to protect large, 3‑phase electrical systems. Rated for 100 A and up to 600 V, this unit delivers reliable overcurrent protection for feeders and branch circuits in industrial and commercial panel environments. Built to endure demanding installation conditions, it helps keep equipment, wiring, and operators safe by interrupting fault currents efficiently when needed.

Key specifications

• Part Number: HDA36100SR
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Configuration: 3‑pole circuit breaker for 3‑phase protection
• Brand: Square D (Schneider Electric)

Why this matters

• Precise 3‑phase protection: The 3‑pole design ensures synchronized interruption across all phases, reducing the risk of imbalanced loads and equipment damage.
• Clear compatibility within Square D ecosystems: Designed to work with Square D panels and enclosures that accept HDA series breakers, delivering a seamless fit in existing safety and distribution setups.
• 600 V readiness: Suitable for many industrial and commercial applications that operate at higher voltage levels, helping you protect a wide range of motors, drives, and feeders.

Best-use scenarios

• Protection for 3‑phase feeders feeding motors, transformers, or large equipment in manufacturing and processing facilities.
• Replacement or upgrade in compatible Square D panelboards where a 100 A, 3‑pole unit is required.
• New installations in industrial electrical distribution systems that demand reliable, scalable overcurrent protection up to 600 V.

Installation & compatibility

Ensure your panel or enclosure is designed to accommodate HDA series breakers and supports a 3‑pole, 100 A, 600 V configuration. Follow standard electrical installation practices, verify correct alignment with bus connections, and confirm secure mounting to maintain reliable operation. This breaker is intended for use in appropriate Square D systems as part of a balanced, code-compliant electrical distribution solution.

Care and maintenance

Periodically inspect the breaker for signs of wear, corrosion, or loose connections. Maintain clean, dry conditions in the panel, and test operation in accordance with maintenance schedules for your electrical system. If your application experiences frequent trips or abnormal operation, consult a qualified electrician to verify system loading, wiring integrity, and panel compatibility.