Square D HRA36150U31X - 150 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D HRA36150U31X, a 150 A, 600 V three-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built by a trusted name in electrical safety, this breaker combines fast, secure installation with dependable protection for everyday electrical systems.

Why this breaker stands out

• Fast plug-in connection — streamline installation and quick replacements, minimizing downtime during panel servicing or upgrades.
• Thermal-magnetic trip unit — provides stable, repeatable protection performance against overcurrents and short circuits, reducing nuisance trips and safeguarding your wiring.
• Three-pole, 150 A, 600 V design — ideal for three-phase systems and higher-demand circuits, delivering robust protection for commercial and light industrial applications.
• OEM-compatible — engineered to work with matching Square D OEM load centers and panelboards, ensuring consistent electrical performance and trouble-free integration.
• Versatile application — suited for residential, commercial, and light industrial environments where dependable branch circuit protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part number: HRA36150U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from this breaker

Electrical professionals tackling panel upgrades, replacements, or new installations will appreciate the quick, reliable plug-in design and solid protection performance. It’s a practical choice for contractors, facilities managers, and skilled technicians working with three-phase systems in offices, retail spaces, light manufacturing, and other commercial environments. With OEM compatibility and a robust thermal-magnetic trip mechanism, this breaker helps ensure wiring protection aligns with industry standards and panel specifications.

Practical tips for use

• Verify that your panelboard or load center is rated for 600 V and supports a 3-pole, 150 A plug-in breaker before installation.
• When replacing an existing breaker, ensure the form factor and trip characteristics match your system requirements to maintain protective coordination.
• Keep a spare HRA36150U31X on hand for rapid service or future panel upgrades to minimize downtime.
• Store and handle breakers per manufacturer guidelines to prevent damage to the thermal-magnetic trip unit and connection terminals.

Availability: This Square D HRA36150U31X 150 A, 600 V, 3-pole plug-in molded case circuit breaker is a dependable solution for safeguarding electrical infrastructure. Available from AmpState, it combines trusted engineering with practical, job-ready features that help you protect circuits, appliances, and data-center or business-critical equipment.