Square D HDA36150U44X - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HDA36150U44X is a 150A, 3-pole plug-in molded case circuit breaker designed to protect branch circuits from overcurrent and short circuits in panelboards and load centers. It combines fast installation with precise protection, making it a reliable choice for demanding electrical spaces where downtime and faults matter.

• Fast plug-in connection enables quick installation and effortless replacement, reducing service time and enabling faster upgrades or diagnostics.
• Thermal-magnetic trip unit delivers stable, repeatable protection that responds to overloads and short circuits in a predictable, safe manner.
• Three-pole design supports three-phase circuits, ideal for commercial and light industrial electrical systems that drive motors, HVAC, and other equipment.
• OEM compatibility engineered to be compatible with matching OEM load centers and panelboards, ensuring a seamless fit within established electrical infrastructure.
• Versatile application suitable for residential, commercial, and light industrial environments where reliable branch circuit protection is essential.

The HDA36150U44X stands out for its combination of rugged plug-in mounting and precise thermal-magnetic protection, making it a practical choice for both new installations and panelboard upgrades. Its molded-case construction provides durable housing designed to withstand regular switching, vibrations, and typical load conditions in everyday electrical work. When you need dependable protection for three-phase feeder and branch circuits, this breaker delivers consistent performance and straightforward serviceability.

Technical specifications

• Manufacturer: Square D
• Part number: HDA36150U44X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150A
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Commercial electrical panels that require reliable three-phase protection for motors, conveyors, or HVAC equipment.
• Residential or light industrial panelboards where space-saving plug-in breakers simplify upgrades and replacements.
• Maintenance or retrofit projects needing quick, field-ready plug-in solutions that minimize downtime.

With the Square D HDA36150U44X, you’re selecting a robust, compatible, and reusable protection device that aligns with standard panelboard architectures while delivering dependable performance across an array of applications. For installers and facility managers, it’s a practical, long-term solution that supports efficient maintenance and solid electrical safety.