Square D HLA36150U43X - 150 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HLA36150U43X is a 150A, 3-pole plug-in molded case circuit breaker engineered to deliver dependable branch circuit protection in panelboards and load centers. With a fast plug-in connection, this unit minimizes install time and simplifies replacement, helping to reduce downtime during upgrades or service calls.

Key advantages you’ll notice

• Rapid plug-in connection for straightforward installation and quick replacement in compatible OEM panelboards and load centers.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding appropriately to both overloads and short circuits, helping protect wiring and devices without nuisance trips.
• 3-pole design ensures balanced protection across three-phase circuits where applicable, supporting more complex electrical layouts.
• Rugged molded-case construction built for reliable performance in residential, commercial, and light industrial environments.
• OEM compatibility designed to work with matching Square D load centers and panelboards for a cohesive, dependable protection system.

Technical specifications at a glance

• Manufacturer: Square D
• Part number: HLA36150U43X
• 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 cases and practical applications

Designed for circuit protection in panelboards and load centers, the HLA36150U43X is well suited for residential service upgrades, commercial electrical rooms, and light industrial installations where robust, reliable overcurrent protection is essential. If you’re upgrading a service panel, adding distribution capability, or replacing a failed breaker, this 150A, 3-pole unit offers a straightforward, compatible solution that aligns with Square D OEM panels.

Installation and compatibility notes

To ensure optimal performance, pair this plug-in breaker with matching OEM load centers and panelboards from Square D. The plug-in design is intended to streamline installation and replacement, reducing field labor time. Always follow local electrical codes and manufacturer guidelines when integrating new protection devices into an electrical system.

Available from AmpState, the Square D HLA36150U43X delivers reliable, three-phase protection with a focus on durability and easy maintenance—an ideal choice for electricians and facility managers seeking a trusted, long-term solution for branch circuit safety.