Square D HDA36150U31XAABCSH 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36150U31XAABCSH — a rugged 150 A, 3-pole circuit breaker engineered for reliable 3‑phase protection in demanding 600 V electrical systems. Built by Square D, this unit delivers dependable overcurrent protection for feeders, motors, and control circuits in industrial and commercial environments. With its robust construction and proven performance, it’s designed to integrate smoothly into compatible Square D panels and switchgear, helping facilities keep downtime to a minimum while maintaining safe operation.

Key specifications

• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36150U31XAABCSH
• Brand: Square D

What makes this breaker stand out

• The three poles trip together, ensuring balanced disconnection across all phases during a fault and minimizing phase-related damage.
• Suited for sizeable feeders and motor loads, providing robust protection for mid-to-large industrial circuits.
• Ideal for distribution and equipment in 600 V systems often found in manufacturing, processing, and commercial facilities.
• Square D’s legacy of durable protection translates into consistent performance and easier maintenance in plant environments.
• Panel compatibility: Specifically designed to integrate with Square D enclosures and distribution gear, helping streamline installation and service planning.

Ideal use cases

• Protect three‑phase feeders supplying motors, pumps, conveyors, or HVAC equipment in manufacturing floors.
• Distribute power to 3‑phase machinery and control panels within industrial facilities and large commercial complexes that operate at up to 600 V.
• Serve as a dependable main or feeder protection device in appropriately rated Square D panelboards and switchgear.

Installation and care

Ensure the panel and mounting hardware are compatible with the HDA36150U31XAABCSH and 600 V applications. Follow electrical codes and manufacturer guidelines during installation, and verify proper seating of the breaker in the rail or enclosure. After installation, perform standard functional checks and periodic inspections to confirm the trip mechanism remains clean and unobstructed. Regular labeling and documentation of the breaker’s position and rating help maintain clear, safe operation over time.

For facilities needing reliable 3‑phase overcurrent protection at 150 A and 600 V, the Square D HDA36150U31XAABCSH delivers a durable, purpose‑built solution that supports steady performance, simpler maintenance, and cohesive integration with existing Square D equipment.