Square D HLA36100UD 100A 3-Pole 600 V Circuit Breaker

Protect your three-phase systems with confidence using the Square D HLA36100UD 100A 3-Pole 600 V Circuit Breaker. Crafted for demanding commercial and industrial environments, this device delivers reliable overcurrent protection for up to 100 amps across all three phases, keeping motors, pumps, and other critical equipment safer and more dependable.

Key specifications at a glance

• Part Number: HLA36100UD
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Brand/Series: Square D

Why this 3-Pole design matters

For 3-phase circuits, a 3-pole breaker protects every leg simultaneously. This ensures coordinated tripping during overloads or faults, preventing phase-to-phase damage and reducing the risk of equipment failure. In contrast to single- or two-pole solutions, a 3-pole breaker like the HLA36100UD provides comprehensive protection for all conductors in the circuit, which is essential for motors, compressors, and other heavy-load equipment.

Ideal applications

• Three-phase motor control circuits in manufacturing and processing facilities
• Commercial HVAC and large pumps wiring where reliable overload protection is critical
• Electrical service disconnects in medium-duty panels requiring up to 100 A protection

What sets it apart

This Square D breaker is purpose-built for 3-pole, 600 V service, delivering dependable interruption of fault current across all phases. Its design is suited for panels and enclosures that leverage Square D components, promoting cohesive system performance, easier maintenance, and consistent response under load. The 100 A rating makes it a precise fit for circuits that demand solid protection without unnecessary tripping, helping to minimize downtime and optimize electrical efficiency.

Practical tips for use

• Verify compatibility with your panel or enclosure before installation to ensure proper fit and mounting
• Confirm the circuit load does not exceed 100 A to prevent nuisance trips during peak operation
• Follow local electrical codes for proper wiring practices, torque, and safety during installation
• Use in applications where three-phase protection on all legs is required for safe motor starting and operation