Square D HRA36150U44X - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

Square D HRA36150U44X is a 150 A, 3-Pole Plug-In Molded Case Circuit Breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Built for fast, trouble-free installation, its plug-in connection enables quick replacement when service is needed—minimizing downtime and keeping electrical systems online. The integrated thermal-magnetic trip unit provides stable, repeatable protection: the thermal element handles sustained overcurrents, while the magnetic element responds rapidly to short circuits, helping to prevent damage to wiring and equipment.

Key compatibility and installation notes:

• Compatible with matching OEM Square D load centers and panelboards for seamless integration.
• Plug-in mounting simplifies service and reduces the need for extensive wiring changes during upgrades.
• 3-pole design supports 3-phase systems, ideal for larger residential subpanels, commercial distribution, and light industrial feeders.

Ideal applications:

• Residential panelboards and main distribution panels requiring robust 150 A protection on three phases.
• Commercial electrical rooms and light industrial facilities with higher current demand for reliable protection against overloads and short circuits.
• Retrofits and panel upgrades where minimizing downtime is a priority, thanks to rapid plug-in installation.

Technical snapshot:

• Manufacturer: Square D
• Part Number: HRA36150U44X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

With the Square D HRA36150U44X in your panel, you gain a dependable, industry-standard protection solution that integrates smoothly with existing Square D load centers and panelboards. It’s a practical choice for professionals who value precise protection, fast serviceability, and compatibility across residential, commercial, and light industrial environments.