Square D HGL36150U44XAABCSK 150A 3-Pole 600 V Circuit Breaker

Square D HGL36150U44XAABCSK is a rugged, high-capacity circuit breaker designed to protect large, three‑phase electrical systems. With a 150 A current rating and a 3-pole configuration, this device is built to safely interrupt power in demanding environments while supporting up to 600 V systems.

Ideal for industrial and commercial electrical installations, this 150 A, 3-pole breaker provides reliable protection for feeders and critical equipment in three-phase circuits. Its robust design and precise timing help prevent damage from overloads and short circuits, helping keep motors, processing lines, and HVAC systems running smoothly.

• Current rating: 150 A
• Pole configuration: 3-pole (three-phase)
• Voltage rating: 600 V
• Part number: HGL36150U44XAABCSK
• Brand line: Square D

Why this 3-pole, 150 A breaker stands out

Compared to smaller or lower-current devices, this unit is purpose-built for heavier loads and larger distributed circuits. Its three-pole design is specifically suited for three-phase systems, providing synchronized protection across all phases and reducing the risk of imbalanced faults. Built by Square D, it is crafted to fit standard Square D panels and enclosures, ensuring a clean, reliable installation without compatibility guesswork.

Practical applications and scenarios

• Protection for 3-phase motors and feeders in manufacturing lines, processing equipment, and conveyor systems
• Main or branch circuit protection in commercial and light industrial distribution panels
• HVAC equipment and large mechanical systems that operate at up to 600 V
• Upgrade or replacement in existing Square D installations to maintain consistent protection across the system

Tips for installation and optimal use

• Verify the breaker is fully compatible with your Square D panel and enclosure before installation.
• Ensure conductor sizing and wiring practices meet local electrical codes and panel specifications for 150 A, 3-phase service.
• Handle mounting and connection with care to preserve the integrity of the trip mechanism and ensure reliable operation.