Square D HDA36110SL 110A 3-Pole 600 V Circuit Breaker

Square D HDA36110SL 110A 3-Pole 600 V Circuit Breaker delivers dependable protection for three-phase electrical systems in industrial, commercial, and large equipment environments. This 110-amp breaker from Square D is designed to interrupt fault currents cleanly and protect downstream devices, reducing downtime and equipment damage.

Key specifications

• Brand: Square D
• Part number: HDA36110SL
• Current rating: 110 A
• Poles: 3
• Voltage rating: 600 V

What makes this circuit breaker stand out

In three-phase power systems, a 3-pole breaker like the HDA36110SL provides synchronized interruption across all phases, helping prevent unbalanced currents and protecting equipment from partial faults. Its robust construction is built for the rigors of demanding environments—installation in panelboards, switchgear, and motor control centers where reliable protection matters most. Because it’s a Square D part, you benefit from alignment with standard Square D panels and accessories, ensuring consistent fit and performance with minimal compatibility concerns.

Ideal use cases

• Motor starter and distribution circuits for manufacturing lines
• Three-phase feeders in commercial and industrial electrical panels
• HVAC equipment distributions and large powered appliances
• Power distribution for data centers and critical systems needing reliable three-phase protection

Why choose this over generic breakers

Choosing a breaker within the Square D family helps ensure predictable trip characteristics, mechanical compatibility, and easier maintenance across your installations. The HDA36110SL is purpose-built to handle 3-phase loads up to 110 A at a 600 V rating, reducing the risk of nuisance trips or compatibility issues in Square D panel ecosystems.

Practical notes for installation and safety

• Install only in properly rated enclosures or panels designed for 3-pole devices
• Verify system voltage and load requirements match the 600 V rating and 110 A current rating
• Follow local electrical codes and NFPA 70 for safe installation
• Consult a licensed electrician if you are replacing an existing device to ensure correct trip characteristics and mounting compatibility