Square D HDL36150U43X - 150 A, 3-Pole Circuit Breaker | AmpState

Meet the Square D HDL36150U43X—a 150 A, 3-pole molded case circuit breaker engineered for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers.

Overview

The HDL36150U43X combines a compact molded-case design with a thermal-magnetic trip unit, delivering stable, repeatable protection across real-world load conditions. Built to fit neatly into compatible Square D panelboards and load centers, it helps maximize usable space without sacrificing safety or performance.

Key Features

• 150 A, 3-pole configuration provides robust protection for demanding branch circuits and multi-wire applications.
• Compact molded-case design optimizes panel space, making it ideal for crowded panels in residential, commercial, and light industrial settings.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits, reducing nuisance trips while maintaining quick fault interruption.
• OEM-compatible designed for seamless integration with matching Square D load centers and panelboards, ensuring proper fit and coordinated protection characteristics.

Ideal Applications

• Residential panels where a reliable 150 A protection point is needed for feeder or sub-feed circuits.
• Commercial distribution boards and light industrial panels where space efficiency and dependable protection matter most.
• Retrofits and upgrades within Square D systems, delivering consistent trip curves and panel compatibility.

Technical Details

• Manufacturer: Square D
• Part Number: HDL36150U43X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Compatibility & Installation Guidance

Designed for straightforward integration into matching OEM Square D panelboards and load centers. When replacing an older breaker or expanding a system, the HDL36150U43X preserves trip characteristics and coordination within the protection scheme, helping maintain safety margins and reliability across the panel.

Practical Tips

• Verify that your panel is compatible with HDL36150U43X and that the bus arrangement matches the 3-pole configuration.
• Follow the panel manufacturer's torque and wiring recommendations to ensure secure terminations.
• Keep a small inventory of compatible breakers for future expansions or replacements, especially in commercial or light industrial installations.

Choose the HDL36150U43X for dependable 150 A protection that fits cleanly into Square D systems, delivering reliable performance where it matters most.