Square D HDA36100UDYP 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36100UDYP — a purpose-built three-pole circuit breaker engineered to protect three-phase electrical systems with precision. With a 100 A current rating and a maximum voltage rating of 600 V, this unit is designed for reliability in demanding industrial and commercial environments. The part number HDA36100UDYP ensures you’re selecting an exact replacement or upgrade for compatible Square D panels and distribution gear.

Key Benefits

• Three-pole protection delivers synchronized shutoff across all phases, reducing the risk of unbalanced loads and accidental equipment damage.
• 100 A current rating strikes a practical balance for feeding medium-sized motors, transformers, and distribution circuits without excessive nuisance tripping.
• 600 V maximum rating safeguards equipment in controlled environments where higher voltage levels may be present, while staying within safe operating limits for many industrial applications.
• Precisely matched part with the HDA36100UDYP designation for dependable fit and reliable performance in Square D systems.
• Durable construction built to endure the rigors of daily operation in commercial facilities and manufacturing floors.

Why this model stands out

In three-phase installations, misaligned protection can lead to early motor wear or unexpected outages. The HDA36100UDYP delivers coordinated tripping across all three poles, helping to safeguard motors, pumps, compressors, and other critical equipment. Its robust design and compatibility with Square D panels mean you can count on seamless replacement, straightforward maintenance, and consistent behavior over time.

Ideal use cases

• Protection for three-phase feeders feeding motors, pumps, and HVAC equipment
• Distribution protection in light to medium-duty industrial panels
• Replacement or upgrade in existing Square D electrical systems requiring exact part compatibility
• Emergency shutdown and safe power interruption for shared electrical rooms

Technical details at a glance

• 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36100UDYP

Installation and best practices

Install in accordance with local electrical codes and the panel manufacturer’s guidelines. Verify that the circuit breaker’s voltage and current ratings align with your system requirements, and ensure proper seating in the panel to maintain reliable contact and trip performance. When replacing an older unit, make sure the form factor and mounting footprint match to avoid compatibility issues and ensure a clean, secure fit.