Square D HRA36100U31XAABCSK 100A 3-Pole 600 V Circuit Breaker

Square D HRA36100U31XAABCSK is a rugged 100A, 3-pole, 600 V circuit breaker designed to protect feeders and equipment in demanding electrical systems. As part of Square D’s trusted protection lineup, this unit delivers precise, reliable interruption of fault currents in three-phase networks, helping keep downstream components safe and uptime high.

• 100 Amp rating, 3-pole configuration — ideal for three-phase feeders and motor circuits up to 600 V, providing coordinated protection across industrial and commercial installations.
• 600 V maximum operating voltage — engineered for distribution panels, MCCs, and other high-voltage environments where robust overcurrent protection matters.
• Exact part identification — HRA36100U31XAABCSK facilitates precise replacement, panel compatibility checks, and warranty alignment.
• Proven Square D reliability — designed for consistent trip characteristics and long service life, helping reduce nuisance trips and maintenance downtime.

Who this is for: electricians, facilities managers, and maintenance professionals responsible for three-phase power systems that operate at up to 600 V. If you need a dependable, code-compliant protective device for a 100 A circuit in a three-phase layout, this breaker is a straightforward, durable choice that supports safe power distribution and quick fault isolation.

Usage and installation insights:

• Ensure compatibility with your Square D panels and accessories in 600 V three-phase configurations to maintain proper protection coordination.
• Install according to manufacturer guidelines and panel manufacturer torque specs to secure reliable electrical contact and safe operation.
• Periodically inspect for signs of overheating, corrosion, or mechanical wear, and replace with the same part number to preserve trip performance and protective characteristics.

In summary, the Square D HRA36100U31XAABCSK 100A 3-Pole 600 V circuit breaker delivers durable three-phase protection for demanding electrical environments. With precise 100 A protection, reliable trip behavior, and trusted Square D engineering, it’s a well-suited solution for protecting circuits, motors, and distribution panels in commercial and industrial settings.