Square D HRA36150U43X - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

Discover reliable protection with the Square D HRA36150U43X—a 150 A, 3-pole plug-in molded-case circuit breaker designed for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built by Square D and offered by AmpState, this unit combines fast installation with precise protection, making it a practical choice for residential, commercial, and light industrial electrical systems.

• Fast plug-in connection: streamline installation and replacement, reducing labor time and panel downtime.
• Thermal-magnetic trip unit: delivers stable, repeatable protection by reacting to overloads thermally and to short circuits magnetically for immediate interruption.
• 3-pole design: suited for three-phase circuits and multi-wire applications often found in commercial and light industrial settings.
• Plug-in molded-case construction: simplifies maintenance and upgrades within compatible OEM panels and load centers.
• OEM-compatible: engineered to fit matching Square D OEM load centers and panelboards, ensuring proper fit, performance, and safety.
• High-current protection: 150 A rating provides robust protection for downstream equipment and branch circuits within supported panels.

Why this breaker matters in your electrical system

When you need dependable protection without complicating service work, the HRA36150U43X delivers. Its thermal-magnetic mechanism balances nuisance trips with fast magnetic action on faults, helping protect wiring, devices, and connected loads from damage. The plug-in format minimizes panel disruption during upgrades or servicing, while the 3-pole configuration handles the dynamics of three-phase installations common in commercial spaces.

Key specifications for quick reference

• Manufacturer: Square D
• Part Number: HRA36150U43X
• 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

Ideal use cases

• Upgrading or replacing breakers in existing Square D panelboards and load centers where a 150 A, 3-pole unit is required.
• Providing reliable protection for commercial light industrial equipment, machinery feeders, and three-phase circuits in small to mid-size installations.
• Planning panel upgrades or maintenance projects that demand a fast, secure plug-in solution with coordinated trip behavior.

In short, the HRA36150U43X is a practical, purpose-built solution for safeguarding electrical systems with performance you can trust. Whether you’re wiring a new panel, replacing an aging breaker, or integrating with OEM equipment, this plug-in breaker delivers predictable protection and straightforward service—exactly what you need for peace of mind on every job.