Square D HDA36100U43XAABCSHYP 100A 3-Pole Circuit Breaker

Square D HDA36100U43XAABCSHYP is a 100 A, three-pole circuit breaker designed to protect three-phase electrical systems in compatible Square D panels and distribution boards. Built for dependable interruption in the event of overloads or faults, this unit helps keep motors, feeders, and critical equipment safeguarded while minimizing downtime.

Key advantages of this 3-pole solution

• Three-pole protection provides balanced interruption for all phases in 3‑phase circuits, preventing phase imbalance and equipment damage.
• 100 amp rating makes it ideal for protecting large feeders, motor drives, and other high‑current loads common in commercial and light industrial settings.
• Part of the HDA family—engineered for compatibility with Square D distribution panels, ensuring a reliable fit and predictable performance.
• Streamlined replacement supports straightforward upgrades or replacements in existing installations, reducing panel downtime during maintenance.

Typical use cases

• Protecting three-phase motors, compressors, pumps, conveyors, and HVAC gear in commercial facilities or light industrial environments.
• Upgrading or stocking spare breakers for service panels that service busy production lines or data center peripheral equipment.
• New installations where a robust, 3-pole, 100 A protection device is needed to safeguard critical 3-phase circuits.

Compatibility and installation tips

• Designed for use in Square D panels and enclosures that accept HDA-series breakers with a 3-pole, 100 A configuration.
• Before installation, verify the panel’s listed compatibility and ensure conductor sizing matches circuit protection requirements for 100 A protection.
• Follow standard electrical safety practices: disconnect power, secure all terminations to manufacturer torque specs, and clearly label the protected circuit.
• Consider keeping a compatible spare on hand to minimize downtime during routine maintenance or panel servicing.

Why choose this Square D breaker

For professionals who demand precise, dependable protection for 3‑phase systems, the HDA36100U43XAABCSHYP delivers a trustworthy solution from a brand with a long history of electrical protection expertise. Its 3-pole, 100 A design is purpose-built for robust circuit protection in commercial and light industrial applications, helping you prevent equipment damage, reduce fault-related downtime, and maintain safe, compliant electrical distribution.