Square D HRA36100U33X 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HRA36100U33X, a purpose-built 3-pole circuit breaker engineered for reliable overcurrent protection in 600-volt systems. Designed for commercial and light-industrial environments, this unit provides consistent, dependable interruption across all three phases, safeguarding motors, feeders, and distribution circuits from faults that can drive downtime and equipment damage.

Key specifications

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HRA36100U33X
• Brand lineage: Square D (Schneider Electric) performance you can trust in critical power environments

Why this 3-pole design matters

• Three-phase protection: Ensures synchronized interruption across all phases, reducing the risk of imbalanced loads and protecting multi-phase equipment from damaging fault conditions.
• High-voltage capability: With a 600 V rating, it’s suited for tray wiring, panel feeders, and other applications where higher voltage distribution is involved.
• Dedicated replacement fit: The HRA36100U33X designation aligns with established Square D panels and configurations, simplifying maintenance and minimizing compatibility concerns during upgrades or replacements.

Ideal applications and use cases

• Protection for 3-phase motors, pumps, and conveyors in manufacturing or processing facilities
• Feeder protection in commercial electrical panels and distribution boards
• HVAC and building systems where reliable high-amp, three-phase interruption is critical
• Upgrades or replacements in existing Square D installations to maintain consistent system protection

What makes it stand out

• Focused, high-capacity protection: A dedicated 100 A rating provides robust fault protection for mid-to-large three-phase circuits without stepping down performance.
• Durable, panel-ready design: Built to integrate smoothly into Square D panels, helping maintain electrical system integrity and ease of maintenance.
• Clear traceability: The exact part number HRA36100U33X ensures you’re selecting the precise device for your panel configuration, reducing guesswork during procurement.

Practical tips for installation and care

Before installation, verify that the circuit breaker matches your panel’s specifications and that the surrounding environment meets the operating conditions for a 3-pole, 600 V device. Follow proper safety procedures and refer to the panel manufacturer’s installation guidelines for torque and mounting details. When replacing a unit, confirm the new breaker’s trip characteristics align with your system’s protection requirements to maintain coordinated protection across the circuit.

Durability and reliability in everyday operation

By delivering dependable overcurrent protection for three-phase circuits, the Square D HRA36100U33X helps minimize unplanned outages, protects valuable equipment, and provides peace of mind in environments where high-voltage distribution and continuous operation are the norm. For facilities using Square D panels and 600 V distribution, this 100 A, 3-pole breaker is a purpose-built choice that aligns with your existing infrastructure and maintenance workflows.