Square D HDA36150U43XAABCSJ 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36150U43XAABCSJ 150A 3-Pole 600 V Circuit Breaker—engineered for dependable, three‑phase protection in demanding electrical environments. With its precise 150 A rating and 3‑pole design, this unit is built to safeguard feeders and equipment while keeping downtime to a minimum.

Key specifications at a glance

• Part Number: HDA36150U43XAABCSJ
• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V

Designed for three‑phase systems, this breaker provides robust protection for heavy loads common in commercial and light industrial applications. The 3‑pole configuration supports balanced phase protection, helping to prevent overloads and electrical faults across all phases of the circuit.

Why this Square D breaker stands out

• Brand lineage you can trust: Square D is known for durable, predictable protective devices that align with established electrical standards.
• Exact-fit reliability: The HDA36150U43XAABCSJ part number pinpoints a precise cross-reference for replacement and stocking, simplifying maintenance and reducing installation guesswork.
• High‑voltage capability: With a 600 V rating, it’s suitable for a wide range of commercial and industrial panel configurations.

Ideal use cases

• Upgrading or stocking spare breakers for 3‑phase panels in warehouses, manufacturing spaces, or data‑center environments.
• Replacing aging or worn breakers in Square D panels that accept HDA‑series devices to restore reliable protection.
• System expansions where additional feeder protection is required without altering existing panel infrastructure.

Practical installation and maintenance tips

• Verify panel model compatibility and bus configuration before installation to ensure a seamless fit.
• During maintenance, check terminal connections for tightness and signs of overheating, and document any trip history to identify emerging issues.
• Follow standard lockout/tagout procedures to ensure a safe replacement process.

For professionals seeking dependable three‑phase protection with clear part traceability, the Square D HDA36150U43XAABCSJ 150A 3‑Pole 600 V Circuit Breaker delivers consistent performance, straightforward replacement, and compatibility within the Square D ecosystem. It’s a precise, practical choice for safeguarding demanding power systems while helping keep operations running smoothly.