Square D HDA36100UO 100A 3-Pole 600 V Circuit Breaker

Square D HDA36100UO is a 100A, 3-pole, 600V circuit breaker crafted for reliable three‑phase protection in commercial and industrial electrical systems. It serves as a robust line of defense, automatically interrupting current during overloads or short circuits to shield wiring, motors, and downstream equipment from damage and unexpected downtime.

Built to integrate with standard Square D panel enclosures, this HDA-series breaker (part number HDA36100UO) offers a compact, sturdy solution for demanding environments where dependable power isolation is essential.

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36100UO
• Configuration: Three-phase protection for 3‑pole circuits

Who benefits from this circuit breaker? electrical contractors, facilities maintenance teams, and systems integrators working with 3‑phase electrical distributions in manufacturing floors, data centers, large HVAC installations, and commercial power panels. It’s particularly well-suited for protecting three‑phase motors, fans, pumps, and other equipment that demand balanced phase protection at higher voltages.

Why choose this Square D model over other options? its 3‑pole design provides synchronized protection across all three phases, reducing the risk of unbalanced loads and phase-to-phase faults. The 600V rating makes it appropriate for higher‑voltage distributions common in industrial settings, while the 100A current rating aligns with mid‑sized branch circuits and motor feeders. The result is targeted protection with straightforward replacement in compatible panels, streamlined maintenance, and fewer components to manage in complex electrical rooms.

Practical usage tips:

• Verify that the installation matches the panel’s rating and that the 600 V rating aligns with your system’s minimum/maximum voltage.
• Ensure the load requires 3‑phase protection and designed current does not exceed 100 A for reliable overcurrent protection.
• Coordinate with compatible Square D enclosures and follow standard safety practices during replacement or installation.
• Keep the part number HDA36100UO handy for future maintenance or replacement to ensure consistent protection characteristics.

In environments where dependable, straightforward three‑phase protection is non-negotiable, the Square D HDA36100UO delivers precise, balanced interrupting capability at 600 V in a compact 3‑pole package—making it a practical, durable choice for industrial electrical systems.