Square D HDA36090 - 90 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D HDA36090 — a 90A, 600V, 3-pole plug-in molded case circuit breaker built to protect your panelboards and load centers with precision and speed. This device delivers dependable branch circuit overcurrent and short-circuit protection, helping your electrical system stay safe and up and running.

• Fast plug-in connection for quick installation and easy replacement, reducing downtime during panel servicing or upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection against both overloads and short circuits, minimizing nuisance trips while maintaining safety.
• OEM-compatible design ensures reliable operation with matching Square D load centers and panelboards for a seamless protection system.
• Suitable for residential, commercial, and light industrial applications, adaptable to a variety of panel configurations and load profiles.

Technical specifications

• Manufacturer: Square D
• Part number: HDA36090
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 90 A
• Voltage rating: 600 V
• Poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why choose this 3-pole plug-in MCCB

When your electrical system requires reliable three-phase protection in a compact, plug-in form factor, the HDA36090 delivers. The 90A rating suits feeders and branch circuits in medium-duty panels, while the 600V rating accommodates a wide range of commercial and light industrial electrical loads. The plug-in design not only speeds up installation but also simplifies maintenance and future upgrades, keeping downtime to a minimum.

Ideal use cases

Install this breaker in service panels or distribution panels within homes, small offices, retail spaces, and light industrial environments that rely on efficient, code-compliant protection for 3-phase circuits. It’s a practical choice whenever you need durable, consistent protection for motor loads, lighting systems, and general branch circuits without sacrificing speed of replacement or reliability.

Installation and compatibility tips

• Pair with matching OEM Square D panelboards to ensure optimal plug-in fit and reliable trip performance.
• Follow standard electrical practices for panel assembly to ensure secure seating and proper operation of the thermal-magnetic trip unit.
• Use as part of a cohesive protection strategy with other Square D devices to maintain system safety and code compliance.