Square D HDL36100U44X - 100 A, 3-Pole Circuit Breaker | AmpState

Square D HDL36100U44X is a 100 A, 3-pole molded case circuit breaker engineered to protect electrical systems from overcurrent and short circuits. Designed for dependable branch circuit protection in panelboards and load centers, this unit delivers reliable, trip-coordinated performance for three-phase or multiwire applications commonly found in residential, commercial, and light industrial settings.

Why this breaker stands out

• Compact molded case design maximizes panel space, making layouts cleaner and easier in dense panels or limited electrical spaces.
• Thermal-magnetic trip unit ensures stable, repeatable protection across varying loads and temperatures, reducing nuisance trips while maintaining quick response to faults.
• OEM panel compatibility is specifically designed to integrate with matching Square D load centers and panelboards, ensuring proper fit, mounting, and coordination.
• Three-pole, 100 A configuration provides common-trip protection for three conductors, ideal for 3-phase equipment or multiwire branch circuits in commercial or light industrial environments.
• Versatile applications well-suited for residential service upgrades, commercial feeders, and light industrial panel protections where reliable, long-term performance matters.

Use cases and practical scenarios

- Upgrading an aging panel to a modern thermal-magnetic breaker with precise trip characteristics.
- Supplying 3-phase equipment in small to mid-size commercial spaces where panel footprint is a priority.
- Replacing worn or failing breakers in Square D panels to restore dependable protection and improve electrical coordination.

Technical snapshot

• Manufacturer: Square D
• Part number: HDL36100U44X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the HDL36100U44X means selecting a breaker built to fit Square D panelboards and load centers with a trusted trip mechanism. It’s a durable, precise solution for delivering reliable protection, clean panel layouts, and peace of mind in everyday electrical systems.