Square D HJL36100U44XAABCSJ 100A 3-Pole 600 V Circuit Breaker

Engineered by Square D, the HJL36100U44XAABCSJ circuit breaker is a rugged, high-capacity protection device designed for commercial and industrial electrical systems. With a 100 A current rating, 3 poles, and a 600 V maximum voltage, this breaker provides robust protection for three-phase feeders and motor circuits.

Designed for three-phase protection

As a 3-pole device, it interrupts all phases of a three-phase circuit, ensuring balanced shutdown and minimizing phase-to-phase faults. This is essential for protecting motors, transformers, conveyors, and other heavy loads in manufacturing facilities, data centers, and large commercial installations.

Key specifications

• Part Number: HJL36100U44XAABCSJ
• Current Rating: 100 A
• Poles: 3
• Voltage Rating: 600 V

Why this matters

Reliability in power protection hinges on precise interruption and durable construction. This Square D circuit breaker is built to handle routine peaks and sudden faults, helping prevent wiring damage, equipment failures, and downtime. The 3-pole configuration makes it a natural fit for balanced three-phase systems, reducing nuisance trips and ensuring predictable, repeatable performance.

Ideal use cases

• Three-phase feeders in commercial or industrial electrical panels
• Protection for motor circuits, HVAC compressors, conveyors, and pumps
• Panelboard upgrades or replacements where a robust 100 A, 3-pole, 600 V device is needed

Installation and compatibility

For safe, reliable operation, replace like-for-like with the exact part number to maintain panel labeling and protective coordination. This device is designed for use in Square D compatible panels and enclosures that accommodate a 3-pole, 100 A, 600 V circuit breaker. A qualified electrician should perform installation, verify bus bar alignment, and confirm proper terminal torque according to the panel manufacturer’s specifications.

Practical tips

• Keep a spare HJL36100U44XAABCSJ on hand for rapid replacement in critical service panels
• Coordinate with overload and short-circuit protection to ensure selectivity and rapid fault isolation
• Label circuits clearly to reflect the 3-pole, 100 A protection and improve future maintenance

Choose the Square D HJL36100U44XAABCSJ for dependable protection of essential electrical infrastructure, delivering safety, reliability, and uptime in demanding environments.