Square D HLA36070SN 70A 3-Pole 600 V Circuit Breaker

Meet the Square D HLA36070SN 70A 3-Pole 600 V Circuit Breaker—a robust protection device built for demanding three-phase electrical systems. This part number, HLA36070SN, is designed to safeguard your panel and connected equipment against overloads and short circuits in industrial and commercial settings.

Key specifications

• Current rating: 70 A
• Poles: 3 (three-pole configuration for three-phase circuits)
• Voltage rating: 600 V

Why this 3-pole 600 V breaker stands out

Engineered for reliability in mid to large distribution panels, the HLA36070SN delivers consistent trip performance under typical three-phase loads. Its 3-pole design ensures balanced protection across all phases, reducing the risk of undervoltage or unbalanced loads that can damage equipment.

Ideal use cases

• Protect three-phase motors and compressors in HVAC, manufacturing, and facility automation
• Distribute power to three-phase equipment in data centers, workshops, and warehouses
• Serve as a main or branch protective device in Square D panels where a 70 A, 3-pole, 600 V rating is required

Installation and compatibility

Designed to integrate with Square D enclosures and distribution panels that accept HLA-series breakers, this unit simplifies panel upgrades and replacements. When installing, ensure the circuit is properly configured for three-phase service and that the panel denomination matches a 600 V rating. Replacing a worn breaker with the HLA36070SN restores reliable overcurrent protection and system integrity.

Practical insights

• Keep a spare HLA36070SN on hand for quick field replacements to minimize downtime
• Pair with corresponding protective devices and wiring appropriate for 600 V systems to maintain safety margins