Square D LA363001021 Circuit Breaker, 300A, 3-Pole, 600V

Introducing the Square D LA363001021 circuit breaker—a rugged, industrial-grade protector designed for demanding electrical service, maintenance, and replacement projects. With a 300 A rating, a 3-pole configuration, and a 600 V operating profile, this unit delivers dependable three‑phase overcurrent protection where reliability matters most.

Key specifications and compatibility

• Part number: LA363001021
• Current rating: 300 A
• Poles: 3-pole
• Voltage: 600 V
• Manufacturer: Square D
• Ideal for: Industrial service, maintenance, and replacement projects

What makes it different

Built by Square D, the LA363001021 is part of the LA-series family—engineered for durable performance in factory and plant environments. Its three-pole design ensures balanced protection across all phases, helping to prevent uneven loading and reduce wear on downstream equipment. As a genuine Square D component, it integrates seamlessly with compatible enclosures and distribution panels, simplifying sourcing and ensuring consistent performance across your electrical system.

Ideal use scenarios

• Main protection for industrial feeders and distribution panels in manufacturing, processing, and automation facilities
• Reliable replacement for aging or worn-out breakers to minimize downtime
• Spare unit for field service fleets to accelerate on-site maintenance and repairs

Compatibility and installation tips

Always verify fit with the exact part number—LA363001021—and ensure your application requirements align with its ratings. Follow Square D installation guidelines for LA-series breakers, and apply proper safety procedures during handling and mounting. If you’re unsure about compatibility, our team can help confirm the part number against your panel model and system configuration.

Purchase with confidence

Choose the Square D LA363001021 for dependable, high-current, three-phase protection in industrial settings. Designed to endure demanding operations and to streamline maintenance planning, this breaker provides a reliable replacement path within Square D’s trusted infrastructure.