Square D HJL36100U44XAABCSDYP 100A 3-Pole 600 V Circuit Breaker

Square D HJL36100U44XAABCSDYP is a robust 100 A, 3-pole, 600 V circuit breaker built to protect three-phase electrical systems in commercial and industrial environments. Designed to interrupt fault currents quickly and reliably, it helps keep motors, drives, and panelboards safe from damage due to overloads or short circuits.

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJL36100U44XAABCSDYP

What makes this 3-pole breaker stand out

Three-pole protection ensures all three phases trip together, reducing the risk of phase imbalance that can overstress motors and equipment. This is essential for reliable operation of 3-phase loads such as compressors, pumps, conveyors, and large HVAC systems.

Ideal use cases

• Three-phase feeders in commercial or industrial panelboards
• Main or branch protection for motor-driven equipment
• New installations or retrofits within Square D distribution systems that require consistent, coordinated protection

Why it matters for your electrical system

With a dedicated 100 A capacity and a 600 V rating, this circuit breaker provides scalable protection for mid-size three-phase circuits. It helps prevent damage from overloads and short circuits, supports safer maintenance by allowing quick isolation of a protected circuit, and contributes to overall electrical reliability in busy facilities.

Compatibility and installation tips

Design and engineering align with Square D panelboards and distribution gear, ensuring straightforward installation in compatible installations. For best results, confirm that the breaker matches your panel’s trip characteristics and space with the existing Square D lineup. When wiring the unit, follow standard safety practices: de-energize the system, verify voltage levels, and torque terminals to the manufacturer’s specifications.

Whether you're outfitting a new panel or upgrading an aging distribution system, the HJL36100U44XAABCSDYP 100 A 3-Pole 600 V circuit breaker delivers dependable three-phase protection with a clear, OEM-backed lineage from Square D.