Siemens | HJXD63M400L | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Siemens HJXD63M400L, a purpose-built circuit breaker engineered for demanding three-phase environments. With a 400A rating, 3-pole configuration, and a 600V maximum, this unit is designed to protect high-current equipment and power distribution systems with precise, reliable interrupting capability. It’s the go-to choice for maintenance, retrofit, and replacement tasks where exact specifications matter.

Why choose the Siemens HJXD63M400L

• : 400A nominal current handles strenuous three-phase loads common in industrial panels and service entrances.
• Three-pole design: Simultaneous disconnection of all three phases enhances safety and protects equipment from unbalanced loads.
• Industrial-grade voltage handling: Rated for up to 600V systems, making it suitable for a wide range of commercial and light-industrial applications.
• Precise compatibility reference: The part number HJXD63M400L is the best reference for ensuring you’re selecting the exact replacement or retrofit component.
• Reliable retrofit option: Specifically suited for upgrading or replacing existing breakers that require matching specs without overhauling the panel.

Ideal use cases

• Upgrading or restoring three-phase service panels in manufacturing, processing, or logistics facilities.
• Retrofit projects where existing hardware demands a 400A, 3-pole, 600V circuit breaker with compatible mounting and bus connections.
• Replacement of aging or failed breakers in industrial control rooms, ensuring continued protection for critical equipment.

Installation notes and compatibility tips

Before ordering, verify that the HJXD63M400L matches your panel’s fit and ratings. The exact part number is the most reliable reference for compatibility, so cross-check with your Siemens catalog or panel documentation to confirm mounting style, trip requirements, and wiring termination.

Specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Part number: HJXD63M400L

Designed to deliver dependable protection for three-phase systems, the Siemens HJXD63M400L is a practical, field-ready solution for professionals focused on reliability, safety, and seamless panel modernization. If your project calls for exacting specifications and a trusted brand, this 400A, 3-pole, 600V circuit breaker from Siemens stands up to the task.