Square D HGA36100U31XAABCSJ 100A 3-Pole 600 V Circuit Breaker

Protect critical three‑phase systems with the Square D HGA36100U31XAABCSJ 100A 3‑Pole 600 V Circuit Breaker. Engineered for reliability in commercial and industrial environments, this unit delivers dependable interruption across all three live conductors in circuits rated up to 600 volts, helping keep equipment safe and downtime to a minimum. With a robust 100‑amp rating and a true three‑pole configuration, it ensures coordinated tripping of all phases when faults occur, reducing the risk of equipment damage and electrical hazards.

Key specifications

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HGA36100U31XAABCSJ
• Brand: Square D

Why this 3‑pole breaker stands out

• Three‑pole design protects all phases in three‑phase feeders, ensuring immediate, coordinated disconnection during faults to protect motors, transformers, and other critical loads.
• Square D lineage provides compatibility with a wide range of Square D panels and infrastructure, simplifying stocking, maintenance, and future upgrades.
• Built for demanding environments typical in commercial and light‑industrial installations, delivering steady performance under regular operation and fault conditions.

Ideal use cases

• Feeder protection for three‑phase motors and equipment in HVAC systems, manufacturing lines, and process equipment.
• Main or subfeed protection in distribution panels where a 100 A capacity aligns with load requirements.
• Panel upgrades or replacements in facilities that require reliable 600 V protection and coordinated phase tripping.

Installation and safety tips: Verify panel compatibility with the HGA series and ensure proper terminal connections and torque per manufacturer guidelines. Always follow local electrical codes and work with a licensed electrician to determine correct breaker sizing and placement for your specific load profile. Having a spare on hand can minimize downtime in critical systems.