Square D HGA36100U43XAABCSD 100A 600 V Circuit Breaker

Meet the Square D HGA36100U43XAABCSD—a purpose-built circuit breaker designed for reliable overcurrent protection in demanding electrical systems. With a 100 A current rating and a 600 V maximum voltage rating, this unit is engineered to safeguard feeders and branch circuits in commercial and light industrial panels, helping you maintain safety, uptime, and performance.

Key specifications at a glance

• Current rating: 100 A
• Voltage rating: 600 V
• Part number: HGA36100U43XAABCSD
• Brand and lineage: Square D

Why this breaker stands out

• Trusted protection from a proven brand. Square D is recognized for consistent performance, designed to interrupt fault currents reliably and protect wiring insulation from damage.
• Precise suitability for 100 A circuits. This unit is purpose-built for applications that demand a solid 100 A protection point, ensuring appropriate coordination with upstream and downstream devices.
• 600 V capability for robust electrical environments. Ideal for equipment rooms, service panels, and distribution boards where higher voltage levels are standard.
• Clear part identification for quick replacement. The exact part number HGA36100U43XAABCSD simplifies ordering, stocking, and cross-reference in maintenance workflows.

Ideal use cases

• Upgrading or replacing a legacy circuit breaker in commercial panels to restore reliable overcurrent protection.
• Feeder circuit protection for small-to-mid-sized industrial equipment and machinery.
• Panel refurbishments or retrofits where a 100 A, 600 V solution is required to meet system design specs.

Practical tips for installation and compatibility

Before installing, verify that the Square D HGA36100U43XAABCSD is compatible with your panel model and listing. Follow all manufacturer guidelines and local electrical codes, and have a licensed electrician perform replacement to ensure proper torque, secure terminations, and safe operation. Keep the exact part number handy during service—this helps ensure you’re retaining the intended performance characteristics and protection level for your system.