Square D HDA36110SN 110A 3-Pole 600 V Circuit Breaker

The Square D HDA36110SN is a rugged three-pole molded-case circuit breaker engineered to protect three-phase electrical systems up to 600 V. With a 110 A continuous rating, this device delivers dependable overcurrent protection for feeders, motors, and distribution circuits in demanding industrial environments.

Key specs at a glance

• Current rating: 110 A
• Poles: 3
• Voltage rating: 600 V
• Part Number: HDA36110SN
• Brand: Square D

Why this model stands out

The 3-pole design ensures simultaneous disconnection of all three phases, enhancing safety and reducing arc risk during fault conditions. The HDA36110SN is purpose-built for reliable protection of medium-sized three-phase feeders and motors, making it a smart choice for panelboards, motor control centers, and industrial distribution networks. Designed for straightforward replacement within compatible Square D installations, it simplifies maintenance and minimizes downtime when service parts are needed.

Ideal use cases

• Protect three-phase feeders in manufacturing lines, conveyors, and CNC machinery
• Guard motors and pumps in HVAC, process, and industrial automation systems
• Serve as a dependable main or branch breaker within square D panelboards and enclosures

Practical considerations and setup tips

• Ensure the installation is within equipment rated for 600 V and compatible with the Square D HDA36110SN
• Keep the part number handy for replacements or cross-reference in maintenance logs
• Inspect connections and mounting integrity periodically to maintain reliable trip performance
• Follow standard electrical safety practices when servicing or replacing breakers in live systems

For robust, dependable protection of 3-phase circuits up to 600 V, the Square D HDA36110SN 110 A 3-Pole Circuit Breaker provides precise, reliable interruption when faults occur, helping you safeguard equipment, improve safety, and maintain productive uptime.