Square D HGL36150U31X - 150 A, 3-Pole Circuit Breaker | AmpState

Meet the Square D HGL36150U31X — a 150 A, 3-pole molded-case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built for real-world demands, this unit combines a compact footprint with a thermal-magnetic trip mechanism that provides stable, repeatable protection across varying electrical conditions.

Why this breaker stands out

• Space-efficient design: The molded-case construction minimizes panel footprint, helping you maximize available space in crowded panels without sacrificing protection.
• Thermal-magnetic trip for predictable protection: The trip unit balances instantaneous response to short circuits with time-delayed protection for overloads, promoting safer, more consistent circuit behavior.
• OEM-compatible for seamless replacements: Specifically designed to work with matching Square D OEM load centers and panelboards, simplifying upgrades and service work.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications where dependable branch-circuit protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part number: HGL36150U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading or replacing breakers in residential panelboards where 3-pole protection is required for subpanels or shared equipment circuits.
• Providing dependable protection for commercial lighting and receptacle circuits in small-to-midsize facilities.
• Light industrial applications where robust fault protection and quick isolation of faults are critical for uptime and safety.

How it benefits you

Choosing the Square D HGL36150U31X means prioritizing safety, reliability, and panel space efficiency. The unit’s thermal-magnetic trip delivers consistent performance from first start-up through peak demand, helping prevent nuisance trips while still shutting down fast during serious faults. Its compatibility with OEM load centers reduces installation complexity, making it an attractive option for contractors and property managers who value straightforward maintenance and long-term compatibility.

What you gain with this protection solution

• Clear, predictable protection for branch circuits in varied environments
• Simplified replacement and service with OEM-compatible design
• Efficient use of panel space without compromising safety or performance