Siemens | HLXD63B400 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

When you need dependable, high-capacity protection for a three-phase electrical system, the Siemens HLXD63B400 circuit breaker stands out. Designed for maintenance, retrofit, and replacement projects, this 400A, 3-pole unit provides solid overcurrent protection for demanding commercial and light industrial applications. Its bolt-on configuration supports secure installation in compatible panels, helping you minimize downtime during service or upgrades.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Mounting style: Bolt-On
• Part number: HLXD63B400

Why this Siemens HLXD63B400 stands out

• : Built to withstand the rigors of industrial environments while delivering reliable protection for three-phase feeders.
• Field-friendly installation: Bolt-on mounting simplifies substitution in compatible panels, enabling faster maintenance and reduced downtime.
• High-capacity protection: 400A rating supports heavy-load circuits common in commercial and light industrial setups, helping prevent expensive equipment damage.
• Clear compatibility reference: The HLXD63B400 part number is your best reference for matching current hardware and ratings with existing systems.

Ideal use cases

• Maintenance or retrofit projects where exact spec matching is critical
• Replacement for failing or outdated three-phase breakers in compatible Siemens panels
• Protection for large motor drives, feeders, and other high-demand circuits in commercial facilities

Installation and practical tips

• Always confirm fit and ratings before ordering to ensure seamless compatibility with your panel or enclosure.
• Keep the HLXD63B400 part number handy as the primary reference when verifying compatibility with your existing setup.
• Prepare the mounting hardware and panel space in advance to minimize service interruptions during replace-and-troubleshoot scenarios.

With the Siemens HLXD63B400 400A 3-Pole 600V bolt-on circuit breaker, you gain a trusted, high-capacity solution that supports reliable electrical protection while simplifying installation and future maintenance. If you’re looking to retrofit or replace a three-phase protection device in a compatible Siemens panel, this unit is crafted to deliver consistent performance and peace of mind.