Square D HDA36090UP 90A 3-Pole 600 V Circuit Breaker

Square D HDA36090UP—a robust 90 A, 3-pole circuit breaker designed for 600 V systems. Built to protect 3-phase power distribution, this unit helps keep industrial equipment and electrical networks safe from overloads and short circuits while supporting reliable, continuous operation in demanding environments.

• Part number: HDA36090UP
• Current rating: 90 A
• Poles: 3
• Voltage rating: 600 V

Why this 3-pole design matters

• Protects all three phases in a 3-phase system, ensuring balanced interruption and coordinated shutdown of power to connected equipment.
• Ideal for protecting motors, conveyors, pumps, and other heavy-load hardware that rely on stable 3-phase power.
• Reduces the risk of phase-to-phase faults cascading into wider electrical issues by providing a single, comprehensive protective device.

Who this is for

• Manufacturing facilities and industrial plants with 3-phase distribution networks up to 600 V.
• Maintenance teams seeking a reliable, straightforward solution to protect high-current loads without introducing unnecessary complexity.
• Electrical contractors specifying durable, field-proven protection for new installs or panel upgrades.

Practical benefits and use cases

• Safeguards critical motors and equipment against overheating, wiring damage, and fault-induced downtime.
• Supports smoother maintenance cycles by providing clear, well-defined protection thresholds at 90 A.
• Versatile for service entrances, switchgear, and distribution panels where three-phase protection is essential.

Tips for installation and compatibility

• Confirm your system operates at a 3-phase configuration and requires protection up to 90 A within a 600 V maximum rating.
• Ensure the breaker fits compatible Square D enclosures designed for HDA-series devices and follows appropriate torque specifications for terminations.
• Plan tripping coordination with upstream and downstream protective devices to minimize unnecessary outages while maintaining safety.

With the Square D HDA36090UP 90A 3-Pole 600V Circuit Breaker, you get precise, phase-coherent protection for demanding 3-phase applications. This device is built to help you maintain safe operation, reduce unscheduled downtime, and simplify your protective-relay strategy in industrial electrical systems.