Siemens | HLXD63B300 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On

Introducing the Siemens HLXD63B300 Circuit Breaker — a robust 300A, 3-Pole, 600V bolt-on solution built to keep critical electrical systems protected and supplied with stable power.

Designed for maintenance, retrofit, and replacement projects, this Siemens circuit breaker aligns with exact specifications to ensure seamless compatibility in panels that support HLXD63B300 series devices.

Key specifications

• Amperage: 300A
• Poles: 3-Pole
• Voltage rating: 600V
• Mounting: Bolt-On
• Part reference: HLXD63B300

Why this matters: The 3-pole configuration provides reliable three-phase protection across the distribution path, helping prevent nuisance trips and ensuring coordinated protection with other Siemens devices in the same lineup. The bolt-on mounting offers a secure, lasting installation in compatible panels, simplifying maintenance and future upgrades.

Ideal use cases

• Maintenance and service replacement in commercial and industrial electrical systems that run on 600V.
• Retrofits where existing equipment requires HLXD63B300 specifications for compatibility.
• New or legacy installations within data centers, manufacturing floors, and large offices that require a robust 300A protection solution.

Compatibility and buying tips

Important: Always confirm fit and ratings before ordering. The HLXD63B300 part number is the best reference for compatibility with Siemens panels and bus configurations. If you’re replacing an existing breaker, verify the panel’s model and the device’s mounting style to ensure proper fit.

Quality you can count on

Siemens designs this breaker to deliver consistent protection, long service life, and predictable performance in demanding environments. By choosing a genuine HLXD63B300, you’re aligning with Siemens’ engineering standards and a product that’s built to work with the rest of your Siemens power distribution ecosystem.