Square D HGA36150U43XAABCSK 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HGA36150U43XAABCSK, a high-capacity 150 A circuit breaker engineered for demanding three‑phase electrical systems. This 3‑pole device delivers dependable protection for feeders and branch circuits in commercial and light industrial environments, with a 600 V maximum rating that supports a wide range of equipment and applications.

Key specifications at a glance

• Current rating: 150 A
• Poles: 3 (three‑phase protection)
• Voltage rating: 600 V
• Part number: HGA36150U43XAABCSK
• Brand: Square D

Why this model stands out

The Square D HGA36150U43XAABCSK is purpose-built for reliable, balanced protection across all three phases. With a dedicated three-pole design, it ensures synchronized tripping and consistent fault isolation, helping to prevent damage to motors, transformers, and distribution panels in three‑phase networks. The durable construction and Square D heritage mean you’re selecting a component trusted in countless installations where uptime matters.

Ideal use cases

• Upgrading or replacing aging breakers in commercial electrical panels that service three‑phase equipment
• Feeding three‑phase motors, drives, HVAC systems, and other heavy loads from a central distribution panel
• Panel modernization projects where a robust, compatible 150 A, 3‑pole, 600 V solution is required

Compatibility and installation considerations

Designed to integrate with Square D panels and enclosures that accept HGA‑series breakers, the HGA36150U43XAABCSK should be verified against your panel’s labeling for correct part family and replacement compatibility. When selecting this breaker, ensure your system is a suitable match for a three‑phase, 150 A protection scheme and observe all local electrical codes during installation.

Performance and reliability in real-world environments

With its 3‑pole configuration and 600 V rating, this breaker is well-suited for distribution panels that handle industrial or commercial loads, providing clear fault isolation and predictable tripping behavior. The result is improved system safety, reduced risk of cascading faults, and a straightforward path to reliable operation across the life of the installation.