Siemens HLXD63M400 400A 3-Pole 600 V Circuit Breaker

Siemens HLXD63M400 is a robust circuit breaker designed for demanding three-phase power distribution. With a 400 A rating and a 600 V maximum voltage, this device delivers reliable overcurrent protection for large electrical feeders and equipment in industrial environments.

What makes the HLXD63M400 stand out

• Three-pole protection (3P) ensures synchronized interruption across all phases, reducing the risk of unbalanced loads and partial faults.
• High current capability with a 400 A rating, suitable for main feeders and large distribution circuits.
• 600 V electrical rating designed for common industrial power distribution environments and equipment.
• Part Number HLXD63M400 provides a precise, compatible replacement option in Siemens systems and panels.

Ideal use cases

Use this Siemens circuit breaker as the main protection device in three-phase distribution panels, motor control centers, or large equipment feeds where a single 400 A breaker governs multiple downstream circuits. It’s well-suited for facilities like manufacturing lines, warehouses, and processing plants where reliable, centralized protection matters.

Benefits you can count on

• Reliable overload and short-circuit protection for high-current three-phase loads, helping prevent equipment damage and downtime.
• Seamless integration with Siemens electrical systems and replacement parts, reducing installation complexity and maintenance time.
• Durable construction designed for frequent operation in demanding environments.

Installation and compatibility tips

When selecting a replacement or upgrading distribution protection, the HLXD63M400 aligns with Siemens’ ecosystem, simplifying panel upgrades and serviceability. Verify system voltage and current requirements match your application to ensure optimal protection and performance.