Square D | LDA36400CU33X | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Square D LDA36400CU33X Circuit Breaker — a robust, industrial-grade overcurrent protection device designed to safeguard large electrical systems. With a 400A rating, 3 poles, and a 600V operating envelope, this breaker is built to handle demanding environments where reliability matters most.

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Part number: LDA36400CU33X
• Brand: Square D

This model is specifically suited for maintenance, retrofit, and replacement projects where exact specifications must be matched. The part number is the best reference for compatibility, ensuring you select a unit that fits your panel and protection requirements without guesswork.

Why choose the LDA36400CU33X for your electrical system?

• Reliable overcurrent protection for large distribution panels and service equipment, helping prevent damage from overloads and short circuits.
• Long-term durability in demanding environments, backed by Square D’s emphasis on safety and consistent performance.
• Clear identification and traceability through the exact part number, simplifying ordering and maintenance records.

Ideal use cases

• Retrofits: upgrade or replace aging protection devices in existing Square D installations that require a 400A, 3-pole, 600V breaker.
• Maintenance: quickly restore critical circuits in industrial or commercial panels to minimize downtime.
• Replacement: swap-in for compatible Square D panels that specify the LDA series or matching specifications.

Practical guidance for a smooth purchase

Before ordering, verify compatibility with your panel by checking fit and ratings. Remember: the part number LDA36400CU33X is your most reliable reference for ensuring a proper match to your equipment and protection scheme.