Siemens | LXD63B300 | Circuit Breaker | 300A | 3-Pole | 600V

Meet the Siemens LXD63B300 circuit breaker—a sturdy, three-pole protection device engineered for demanding three‑phase electrical systems. Rated at 300A and designed for up to 600V, it’s a precise, reliable solution for maintenance, retrofit, or replacement projects where exact specifications matter.

• Exact fit for three‑phase panels: 3‑pole configuration delivers balanced protection across all phases, keeping your industrial or commercial systems safe and stable.
• High-capacity current handling: 300A rating ensures robust protection for heavy-duty circuits without nuisance tripping in normal operation.
• Broad voltage compatibility: Suitable for systems operating up to 600V, making it a versatile option for a wide range of panel designs.
• Direct reference part: The part number LXD63B300 is the clearest reference for compatibility, streamlining sourcing and reducing downtime.
• Maintenance, retrofit, and replacement friendly: Ideal when upgrading, refurbishing, or stocking a ready-to-install spare for critical infrastructure.

The LXD63B300 shines in environments where reliability is non‑negotiable—think industrial electrical rooms, data centers, manufacturing floors, and large commercial buildings. It acts as a first line of defense against overcurrent conditions, helping protect wiring, components, and operators from damage while supporting safe, predictable shutdowns when faults occur.

Compatibility and fit

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility. Use the LXD63B300 as a direct substitute only in panels and assemblies specified by your electrical documentation and labeling.

Specs at a glance

• Amperage: 300A
• Poles: 3‑Pole
• Voltage: 600V
• Part Number: LXD63B300