Square D HLL36080SN 80A 3-Pole 600 V Circuit Breaker Potential Transformer

The Square D HLL36080SN is a rugged, reliable 80A three-pole circuit breaker designed to protect your critical electrical circuits at up to 600 V. Built for industrial and commercial environments, this part (HLL36080SN) delivers dependable overcurrent protection and clean integration with Square D switchgear and panels.

Key features and benefits

• Three-pole configuration provides balanced protection for 3-phase systems, simplifying wiring and coordination across phases.
• 80 A current rating delivers robust overload protection for feeders, motors, and distribution circuits while allowing normal operation without nuisance tripping.
• 600 V maximum voltage rating supports standard industrial and commercial power distribution in many regions.
• Part number HLL36080SN ensures precise replacement and easy ordering within Square D's product ecosystem.
• Potential transformer compatibility designed to support protection schemes that utilize potential transformer interfaces for accurate measurement and coordination.
• Brand trust Square D is a longtime standard in electrical protection, offering compatibility with related panels, breakers, and accessories.

Why this model matters in real-world deployments

• Industrial and commercial panel boards: Use in main distribution panels, subpanels, or switchgear where three-phase protection is essential.
• Motor and feeder protection: Protect motors, compressors, conveyors, and other heavy loads from overloads and short circuits.
• Maintenance-friendly selection: The clear part number and specifications simplify inventory management and spare parts planning.

Practical considerations and tips

• Verify compatibility with your existing Square D components and the panel's voltage and phase requirements before replacement.
• Confirm the protective device's interrupting rating matches the system's fault current levels to ensure coordinated protection.
• Store the original packaging and documentation for warranty and future servicing needs.