Square D HDA36100U43XAABCSDYP 100A 3-Pole 600 V Circuit Breaker

Power your three-phase electrical system with the Square D HDA36100U43XAABCSDYP 100A 3-Pole 600 V Circuit Breaker. Engineered for demanding commercial and industrial environments, this breaker delivers reliable overcurrent protection while maintaining seamless compatibility with Square D panels and enclosures.

Key specifications

• Current rating: 100 A
• Pole configuration: 3-Pole (three-phase protection)
• Voltage rating: 600 V
• Part number: HDA36100U43XAABCSDYP
• Brand lineage: Square D circuit protection, designed for use within Square D electrical systems

Why this model stands out

• Three-pole design ensures coordinated disconnection across all phases, enhancing safety in 3-phase networks.
• Accurate 100 A protection makes it suitable for feeders, main circuits, and motor loads without overiting or undersizing protection.
• 600 V compatibility expands its applicability to a range of commercial and industrial distribution applications.
• Engineered to align with Square D installation standards, reducing fitment uncertainties and simplifying panel integration.

Ideal use scenarios

• Main or branch circuit protection in 3-phase commercial/industrial panels
• Motor control centers, compressors, and heavy equipment feeders up to 100 A
• Upgrading or replacing a like-for-like Square D breaker in existing Square D ecosystems

Installation and compatibility

• Designed for use in compatible Square D panels and enclosures—verify panel compatibility before installation.
• Install by a qualified electrician following standard electrical practices and the manufacturer’s guidelines for 3-pole, 600 V circuits.
• Ensure proper seating, secure mounting, and correct wiring in accordance with current electrical codes.

Practical tips & insights

• Keep a reference to the exact part number (HDA36100U43XAABCSDYP) when planning replacements or stocking spare breakers to ensure correct fit and performance.
• For systems transitioning from lower voltage or different configurations, confirm compatibility with your panel’s bus arrangement and conductors to avoid misfits.
• Regularly inspect breakers in service for signs of wear, arcing, or overheating; replace any unit that shows abnormalities to maintain system safety.