Siemens | HLXD63B300L | Circuit Breaker | 300A | 3-Pole | 600V

Siemens HLXD63B300L circuit breaker is built for demanding 3-phase electrical systems, delivering reliable protection with a 300A capacity across 3 poles and a 600V rating. This unit is ideal for maintenance, retrofit, and replacement projects where exact specs matter.

Key specifications at a glance

• Amperage: 300A
• Poles: 3-Pole
• Voltage: 600V
• Part number reference: HLXD63B300L

Why choose this Siemens circuit breaker? It’s designed to integrate with existing Siemens panels and systems that require the HLXD63B300L family part. It provides consistent, predictable tripping behavior and dependable interruption capability for multi‑phase circuits, reducing the risk of cascading faults in industrial and commercial environments.

Practical use cases

• Maintenance: Replace worn or failed breakers with an exact HLXD63B300L to restore original protection curves and panel compatibility.
• Retrofit: Upgrades for older installations that demand 300A protection on a 3‑phase, 600V circuit while maintaining system integrity.
• Replacement: Keep a ready spare for critical service panels that require quick, spec‑accurate substitutions.

Buying guidance and installation notes

• Always confirm fit and ratings before ordering. The HLXD63B300L part number is the best reference for compatibility.
• Designed for use in 600V systems; align with your panel's stated voltage and amperage requirements.
• Ensure alignment with your panel’s mounting and bus configuration to avoid fit issues during installation.

With Siemens’ reputation for durability and long-term availability of replacement parts, the HLXD63B300L is a dependable choice for keeping your electrical infrastructure safeguarded, compliant, and ready for future workloads.