Square D HDA36100SD 100A 3-Pole 600 V Circuit Breaker

The Square D HDA36100SD is a purpose-built three-pole circuit breaker designed to guard your 3‑phase electrical systems. With a 100 A rating and a maximum 600 V capacity, this device delivers coordinated protection across all three phases, helping prevent phase-to-phase faults and ensuring a safe, reliable shutdown when conditions exceed safe limits.

Key advantages of the Square D HDA36100SD

• Three-pole, 100 A protection: ensures balanced, simultaneous disconnection for 3‑phase circuits up to 600 V, reducing the risk of uneven loading and equipment damage.
• Compact, panel-ready design: engineered to integrate smoothly into Square D enclosures and distribution panels, supporting clean, organized electrical installations.
• Thermal-magnetic trip mechanism: provides reliable overload and short-circuit protection with predictable, fast response to faults.
• Direct compatibility with Square D systems: part number HDA36100SD sits within the Square D HDA family, simplifying sourcing, replacement, and service for maintained systems.

Ideal uses and scenarios

• Protection for 3‑phase equipment such as motors, conveyors, pumps, and HVAC components operating on up to 600 V.
• Upgrades or replacements in commercial or light industrial facilities where dependable phase protection is critical for uptime and safety.
• Use in new installations that require a dedicated, reliable 3‑pole breaker to manage 3‑phase feeders and distribution circuits.

Practical benefits and outcomes

• Clear, unified trip behavior across all phases reduces the chance of lingering faults that could escalate into equipment damage or extended downtime.
• Durable construction designed for steady performance in busy electrical environments, helping to extend service life and reduce maintenance cycles.
• Brand‑trusted compatibility with existing Square D components streamlines installation, stocking, and future part replacements.

For installers and facility managers seeking dependable 3‑phase protection that fits neatly into established Square D ecosystems, the HDA36100SD delivers precise, predictable performance. It’s the practical choice when safeguarding 3‑phase circuits up to 600 V with a clear, straightforward upgrade path from your current protective devices.