Siemens HJX3G400 400A 3-Pole 600 V Circuit Breaker

Meet the Siemens HJX3G400 — a purpose-built circuit breaker engineered for demanding 3-phase power environments. With a robust 400 A current rating and a 3-pole configuration, this device is built to protect large feeders and motor circuits in industrial settings while fitting seamlessly into Siemens-based electrical systems. Part number HJX3G400 ensures precise identification for fast replacements and service.

• Current rating: 400 A — designed to handle substantial load demands without unnecessary interruptions.
• Poles: 3 — optimized for three-phase distribution common in industrial facilities.
• Voltage rating: 600 V — suitable for a wide range of commercial and industrial power networks.
• Model identity: HJX3G400 — clear, exact compatibility within Siemens’ ecosystem for easy stocking and field service.
• Brand reliability: Siemens engineering and build quality provide dependable protection and consistent performance in challenging environments.

This circuit breaker excels in protecting critical equipment and power distribution in factories, manufacturing lines, HVAC and large commercial installations. Use cases include safeguarding large motors, feeders, and control circuits where a 3-phase, 600 V protection device is warranted. Its Siemens provenance helps ensure compatibility with existing panels, breakers, and switchgear, reducing the complexity of upgrades or replacements.

Why choose the HJX3G400 for your electrical system?

• Clear, reliable overcurrent and short-circuit protection for demanding loads, helping to minimize downstream damage and downtime.
• Exact model identification (HJX3G400) supports faster procurement, maintenance planning, and service accuracy.
• Integration-friendly within Siemens-distribution architectures, aiding in cohesive system performance and simplified spare-part logistics.

Practical tips for installation and maintenance

• Before replacement or installation, confirm panel and enclosure compatibility to ensure an appropriate fit and safe operation.
• Keep spare units in a clean, dry environment and document the line-side and load-side connections to streamline future service.
• Incorporate routine inspection of connections and verification of trip functionality as part of your facility’s electrical safety program.

Specifications at a glance

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJX3G400