Square D LDA36250U31X 250A 3-Pole 600 V Circuit Breaker

Meet the Square D LDA36250U31X, a purpose-built circuit breaker designed for demanding three-phase electrical systems. With a 250 A rating across 3 poles and a 600 V capacity, this unit delivers reliable protection for high-current loads while keeping your distribution panel compact and organized. Perfect for commercial and light-industrial applications, it’s the trusted choice when safeguarding motors, feeders, and critical equipment in active power environments.

Key specifications at a glance

• Part Number: LDA36250U31X
• Current Rating: 250 A
• Poles: 3
• Voltage Rating: 600 V

What makes this model stand out

• High-capacity three-phase protection: Designed to reliably guard three-phase circuits up to 600 V, making it ideal for three-phase feeders and key equipment in larger electrical rooms.
• Robust, field-proven design: Built to withstand the rigors of active distribution environments, reducing nuisance trips and improving panel uptime.
• Direct compatibility with Square D ecosystems: Engineered to integrate seamlessly with Square D panels and enclosures that support LDA-series breakers, ensuring straightforward installation and consistent performance.
• Clear identification and maintenance ease: Part number specificity (LDA36250U31X) helps with accurate replacements, quick inspections, and streamlined asset management.

Ideal use cases

• Three-phase motor feeders for conveyors, pumps, fans, and processing equipment in manufacturing facilities
• Main distribution or branch protection in commercial electrical rooms with high-current demands
• Feeder protection for heavy machinery, HVAC systems, and power distribution units within industrial settings

How this breaker solves common problems

In busy electrical environments, protecting expensive motors and sensitive equipment from overloads and short circuits is critical. The LDA36250U31X provides dependable, high-current protection for 3-phase circuits, helping prevent costly downtime and equipment damage. By choosing a breaker designed for 600 V operation, you gain a robust line-side protection option that aligns with higher-voltage distribution schemes often found in larger facilities.

Installation and compatibility tips

Before installation, verify panel compatibility with LDA-series breakers and ensure wiring is sized for 250 A and 600 V service. Follow standard electrical best practices: disconnect power, use appropriate torque on lugs, and route conductors to minimize heat buildup. For ongoing reliability, keep a record of this part number (LDA36250U31X) for future replacements or panel upgrades.

Whether you’re updating an aging panel, setting up a new commercial distribution node, or protecting a heavy-load feeder, the Square D LDA36250U31X delivers the 250 A, 3-pole, 600 V protection you need with a design that fits neatly into contemporary Square D electrical ecosystems.