Square D HLL36100 - 100 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Square D HLL36100 is a 100 A, 600 V, 3-pole molded case circuit breaker engineered for dependable branch circuit protection and short-circuit interruption in panelboards and load centers. Built to integrate smoothly into Square D OEM ecosystems, it delivers reliable performance where space and safety matter most—from residential upgrades to light commercial and industrial applications.

• Compact molded-case design maximizes panel space, making installation and panel organization cleaner and easier, even in tight electrical rooms or crowded distribution panels.
• Thermal-magnetic trip unit provides stable, repeatable protection by precisely responding to overloads and short circuits across varying temperatures and load conditions.
• 600 V rated suitable for a wide range of commercial and industrial power distribution setups, giving you a flexible, future-ready protection solution.
• 3-pole configuration ideal for three-phase circuits, enabling coordinated protection in modern panelboards and load centers.
• OEM-compatible designed to pair with matching OEM load centers and panelboards for straightforward installation and consistent trip coordination.
• 100 A protection provides robust protection for feeder and branch circuits, helping prevent damage to downstream equipment and reducing downtime.

Why this breaker matters for your system

When electrical systems face overloads or short circuits, a fast, predictable response minimizes equipment damage and fire risk. The HLL36100’s thermal-magnetic mechanism delivers a reliable trip curve tailored for real-world operation, ensuring your critical circuits stay protected without nuisance trips during normal startup surges.

Who benefits most

Ideal for homeowners upgrading service panels, small-to-mid sized businesses configuring three-phase distribution, and installers seeking a dependable, space-efficient protection device that works seamlessly within Square D’s panelboard and load center lineup.

Practical use cases

• Upgrading an aging panel to support new three-phase equipment while maintaining robust overcurrent protection.
• Adding a protective device in new commercial or light industrial installations that require 600 V, 3-pole protection.
• Replacing a failing breaker in a panelboard where compact form factor and reliable trip performance are essential.

Key specifications at a glance

• Amperage rating: 100 A
• Voltage rating: 600 V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Applications: Branch circuit overcurrent and short-circuit protection
• Manufacturer/part: Square D, HLL36100