Square D HGA36090SR 90A 3-Pole 600 V Circuit Breaker

The Square D HGA36090SR is a 90A, 3-Pole, 600 V circuit breaker designed to deliver dependable overcurrent protection for three-phase power in demanding industrial and commercial settings. Built to integrate seamlessly with Square D distribution systems, this device helps protect wiring, motors, and equipment while supporting clean, safe shutdowns when faults occur.

Key advantages at a glance

• 90 A current rating provides precise protection for medium-load, three-phase circuits without sacrificing available capacity.
• Three-pole design ensures coordinated disconnection of all phases, preserving system balance and safety during fault conditions.
• 600 V maximum voltage capability makes it suitable for industrial distribution networks that operate at higher voltages, delivering reliable performance across a range of facility needs.
• Square D reliability leveraging proven engineering from a trusted brand in electrical protection, helping panels stay protected and maintain uptime.

Who should consider the HGA36090SR?

• Electrical professionals and panel builders designing or upgrading three-phase distribution in manufacturing facilities, data centers, and large commercial buildings.
• Maintenance teams performing replacements in existing Square D installations to ensure consistent trip characteristics and compatibility.
• Engineers specifying protection for motors, pumps, conveyors, HVAC equipment, and other three-phase loads up to 90 A.

Why this part matters in your system

• Reliable protection helps prevent wiring damage and equipment failures by interrupting fault currents before they cause harm.
• Common trip behavior across all three phases simplifies diagnostics and restores operations quickly after a trip.
• Using the exact part number, HGA36090SR, ensures compatibility with matching Square D panels and accessories, reducing retrofit hassles.

Practical guidance and use cases

• Install as the main protection device in a 3-phase distribution panel or as a key protective element in a controlled equipment rack.
• Ideal for retrofits where existing protection is 90 A or where three-phase service requires a robust 600 V protection strategy.
• Pair with correctly sized conductors and protective enclosures to maximize performance and safety in busy electrical rooms.

Maintenance and care tips

• Follow manufacturer guidelines for replacement intervals and ensure panel labeling matches the device specifications.
• Store spare units in a dry, secure location to prevent corrosion or contamination before installation.
• When replacing an old device, verify that the replacement part maintains compatible trip characteristics and mounting alignment with your existing Square D components.