Siemens FXD63S250 A - 250 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens FXD63S250A — a rugged 250 A, 600 V, 3-Pole bolt-on molded case circuit breaker designed to deliver reliable overcurrent and short-circuit protection in panelboards and load centers. Built for demanding environments, this breaker helps keep electrical systems safe and service-ready with precise protection that you can count on.

Why this breaker stands out

• Bolt-on mounting: A secure, rigid connection that resists vibration and panel movement, maintaining a dependable bus connection in cabinets subjected to door cycling or vibration.
• Thermal-magnetic trip unit: Combines thermal (overload) and magnetic (short-circuit) protection for stable, repeatable performance and fast fault interruption when it matters most.
• OEM system compatibility: Designed to work with matching Siemens loadcenters and panelboards, ensuring consistent fit, coordination, and protection across your electrical distribution.
• Three-pole configuration: Ideal for three-phase circuits, providing coordinated protection across all phases in commercial, light industrial, and select residential apps.
• Heavy-duty 600 V rating: Suitable for a wide range of panels and feeders, delivering reliable performance in both standard and demanding installations.

Where and how you’ll use it

Perfect for main distribution applications in panelboards and load centers where a robust 250 A, 3-pole breaker is required. It serves as a dependable line-side protection device in commercial spaces, mechanical rooms, and light industrial facilities, helping to prevent costly outages by interrupting fault currents before wiring or equipment overheats.

Technical snapshot

• Manufacturer: Siemens
• Part number: FXD63S250A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 250 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical considerations and tips

When upgrading or installing, ensure you’re pairing this FXD63S250A with compatible Siemens panelboards to maintain proper coordination and protection curves. The bolt-on design simplifies retrofit or replacement in established enclosures, helping reduce installation time and ensuring a stable, long-lasting connection in environments where vibration or panel movement is a factor.

Who should consider this breaker

Electrical professionals and facilities managers who need a reliable, high-capacity 3-pole solution for main or branch protection in panelboards and load centers. It’s well-suited for commercial spaces, light industrial applications, and robust residential service panels that require a 250 A rating with solid thermal-magnetic protection.