Square D HDA36090UO 90A 3-Pole 600 V Circuit Breaker

Introducing the Square D HDA36090UO 90A 3-Pole 600 V Circuit Breaker — a purpose-built protection device designed for reliable three-phase power systems. With a 90-amp current rating and a 600-volt maximum, this breaker secures your distribution network against overloads and faults, helping keep downtime to a minimum and equipment protected.

Built for industrial and commercial environments, this 3-pole breaker delivers synchronized disconnection across all conductors, ensuring safe power shutdown and reducing arc-flash risk in maintenance and fault scenarios. Its OEM-grade construction guarantees compatibility with Square D panels and compatible protection schemes, allowing for straightforward replacement and consistent performance within existing electrical setups.

• Current rating: 90 A
• Poles: 3 (three-pole)
• Voltage rating: 600 V
• Part number: HDA36090UO
• Brand: Square D
• Configuration: Three-phase protection for up to 600 V systems

Key benefits and how it helps you:

• Three-phase protection with coordinated trip behavior: By interrupting all three conductors together, it prevents unsynchronized faults that can damage equipment and compromise safety.
• Optimized for motors and equipment with medium loads: A 90 A rating provides a balanced protection level for motors, pumps, conveyors, and other three-phase loads without unnecessary nuisance trips.
• OEM reliability and sourcing ease: As a Square D part, it aligns with existing panels and upstream protection devices, simplifying ordering and ensuring predictable interchangeability.

Use cases and practical applications:

• Three-phase distributions in manufacturing facilities, warehouses, and processing plants that operate at up to 600 V.
• Main or branch protection within panelboards and distribution panels for reliable shutdown during faults and maintenance.
• Motor feeders and HVAC circuits where consistent protection and quick disconnection are essential for safety and reliability.

Installation and maintenance notes:

• Install by qualified personnel in accordance with local electrical codes and the equipment manuals.
• Inspect for signs of wear, overheating, or physical damage during routine maintenance and replace if needed.
• Store and handle in a clean, dry environment to preserve electrical contacts and mechanical integrity.