Siemens | HJXD63B400L | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

For reliable, high-current protection in demanding electrical installations, the Siemens HJXD63B400L circuit breaker delivers a precise, field-ready solution. This 400A, 3-pole, 600V bolt-on breaker is engineered for maintenance, retrofit, and replacement projects where exact compatibility matters.

Designed for robust three‑phase protection

• Amperage: 400A, providing strong overcurrent protection for high-demand circuits.
• Poles: 3-Pole configuration ensures coordinated protection across all three phases.
• Voltage rating: 600V, suitable for a wide range of industrial and commercial distributions.
• Mounting: Bolt-On design for secure, field-ready installation in compatible panels.
• Compatibility reference: Part number HJXD63B400L guarantees precise matching with Siemens panels and systems.
• Application: Specifically suited for maintenance, retrofit, and replacement where a Siemens match is required.

Compatibility and installation notes: Confirm fit and ratings before ordering. The part number HJXD63B400L is your best reference to ensure seamless compatibility with your panel and distribution setup.

Use cases and ideal customers

• Retrofit projects to add capacity or replace aging breakers in Siemens-equipped panels.
• Maintenance scenarios where a direct, exact-match replacement is essential.
• Three-phase feeder protection or main-disconnect applications in industrial and commercial environments.
• Panel builders and electrical contractors assembling or upgrading distributed power systems in manufacturing facilities and service rooms.

Why this Siemens breaker stands out

The HJXD63B400L combines Siemens’ proven reliability with a bolt-on mounting approach that simplifies installation and maintenance in compatible panels. By using the exact part number, you ensure consistent trip characteristics and system coordination across all three phases, reducing downtime and risk during replacement or retrofit projects.