Siemens | HHLXD63B400 | Circuit Breaker | 3-Pole | Bolt-On

Engineered by Siemens, the HHLXD63B400 Circuit Breaker is a robust 3-Pole bolt-on unit designed for dependable protection of three-phase power systems. It excels in maintenance, retrofit, and replacement projects where alignment with existing specs matters most.

Precise compatibility and installation you can trust

With the part number HHLXD63B400 as your primary reference, this breaker fits compatible Siemens panels and configurations that require a 3-Pole bolt-on device. Before you order, confirm the exact fit and ratings for your panel to ensure proper protection and electrical performance.

Why this 3-Pole Bolt-On design stands out

• Secure bolt-on mounting for a solid mechanical connection, reducing vibration and loosening in challenging environments.
• Three-pole configuration provides balanced protection across all three phases in typical 3-phase systems.
• Designed to streamline maintenance and replacements, letting technicians swap in the exact Siemens unit quickly without reconfiguring downstream wiring.
• Trusted Siemens build quality ensures consistent performance, reliability, and predictable trip behavior when protection is needed.

Ideal use scenarios

• Retrofit older panels to modern protection standards in manufacturing lines, HVAC installations, or commercial power distribution.
• Replace failed or aging breakers in existing Siemens installations that require a 3-pole bolt-on solution.
• Pair with motor control centers or panel boards where three-phase protection is essential for motors, drives, and power circuits.

Practical guidance for deployment

To maximize safety and performance, follow standard electrical practices: disconnect power before handling, verify the breaker’s ratings align with your system’s voltage and current requirements, and install per Siemens installation guidelines. The 3-Pole bolt-on configuration provides straightforward alignment within compatible panels and supports secure, durable operation over time.

Siemens reliability you can count on — the HHLXD63B400 is a purpose-built solution for professionals who need dependable circuit protection that aligns with existing equipment, minimizes downtime, and simplifies replacement tasks.