Square D HGL36100U43X - 100 A, 3-Pole Circuit Breaker | AmpState

Meet the Square D HGL36100U43X, a 100 A, 3-pole molded case circuit breaker designed to safeguard branch circuits in panelboards and load centers with precision and reliability.

Engineered with a thermal-magnetic trip unit, this breaker delivers stable, repeatable protection against overloads and short circuits, adapting to fluctuating electrical loads without nuisance trips.

• Space-efficient design — compact molded-case construction frees up precious panel space, making it ideal for crowded panels or when upgrading to higher protection in compact enclosures.
• Three-pole protection — protects three-phase circuits or three conductors in multi-wire systems, providing coordinated protection for 3-phase equipment.
• OEM-ready compatibility — designed to fit and function with matching Square D OEM load centers and panelboards for reliable, predictable performance.
• Versatile application — suited for residential, commercial, and light industrial environments where dependable overcurrent and short-circuit protection is essential.

Key specifications

• Manufacturer: Square D
• Part Number: HGL36100U43X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

• Replacing a worn-out breaker in an existing loadcenter that requires 100 A, 3-pole protection.
• Feeding a 3-phase subpanel in a small commercial space or workshop.
• Upgrading panel protection during electrical system modernization where panel space is at a premium.

Why AmpState chose this model for you: with its compact form, robust thermal-magnetic protection, and guaranteed compatibility with Square D panelboards, the HGL36100U43X offers a dependable, long-term solution for critical protection needs. Whether you're an electrician, building manager, or DIY homeowner tackling a panel upgrade, this breaker inserts smoothly, maintains coordination with downstream devices, and helps prevent costly outages.