Square D HDA36110SD 110A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36110SD, a robust circuit breaker built for demanding three-phase power systems. With a 110 A rating and a 3-pole design, it delivers reliable overcurrent protection for distribution networks while guarding critical equipment in industrial and commercial environments. This particular model is engineered to handle up to 600 V, making it a trusted choice for challenging electrical applications.

Specifications at a glance

• Current rating: 110 A
• Pole configuration: 3-pole (three-phase)
• Voltage rating: up to 600 V
• Part number: HDA36110SD

Why this model stands out

The HDA36110SD is designed to align with Square D panels and switchgear, ensuring compatibility and streamlined maintenance across your electrical infrastructure. Its three-pole configuration provides balanced protection across all three phases, helping prevent phase-to-phase faults and protecting motors, transformers, and feeders from overloads. In facilities where uptime matters, this breaker offers predictable trip behavior and dependable performance under fault conditions.

Ideal use cases

• Protect three-phase motor circuits in manufacturing lines, ensuring quick isolation of faults to minimize downtime.
• Distribute power in data centers, laboratories, workshops, and other spaces with substantial electrical loads requiring solid, phase-balanced protection.
• Serve as a reliable replacement part for existing Square D installations, enabling quick procurement and continuity in maintenance programs.

What to expect in practice

• Clear, consistent protection for three-phase systems operating up to 600 V, helping safeguard electrical components and wiring from overload damage.
• A practical, standardized component within a Square D ecosystem, simplifying inventory management for facilities that standardize on the brand.

Installation and care tips

• Verify that the breaker’s specifications match the panel’s ratings and the circuit’s requirements before installation.
• Follow all applicable electrical codes and the panel manufacturer’s guidelines to ensure safe, proper seating and torque during installation.
• Keep spare HDA36110SD units on hand for quick replacements to reduce downtime during routine maintenance or fault isolation.