Siemens FXD63B125 125A 3P Circuit Breaker, Bolt-On | AmpState

The Siemens FXD63B125 is a dependable 125 A, 3-pole bolt-on circuit breaker designed for everyday electrical work. Perfect for protecting circuit paths in panelboards, load centers, and broader electrical distribution systems, it’s an ideal choice for seamless replacements and robust spare stock that keeps your BOM aligned to the original part number.

Key specifications at a glance

• Manufacturer: Siemens
• Part number: FXD63B125
• Type: Circuit Breaker
• Amperage: 125 A
• Poles: 3
• Mounting: Bolt-On
• Applications: Panelboards, load centers, and electrical distribution systems

Why this matters for your project

• Secure, durable installation: Bolt-On mounting provides a solid, vibration-resistant connection ideal for demanding electrical environments.
• Exact fit for replacement projects: With the FXD63B125, you can align replacements with original equipment and maintain consistent protection across your distribution panels.
• Smart spare strategy: Keep a ready-to-use 125 A, 3-pole unit on hand to minimize downtime and keep BOMs aligned with the original Siemens part number.
• Versatile protection: Suitable for protecting circuits in various distribution setups, helping you maintain safe, reliable power delivery.

Who benefits most

• Electricians undertaking panelboard or load-center upgrades and replacements
• Facilities maintenance teams needing reliable spares to reduce downtime
• Electrical contractors sourcing compatible parts for Siemens-based installations

Buy with confidence

AmpState offers the FXD63B125 for customers who value compatibility and quick access to genuine Siemens parts. If you’re unsure about fit, we’re ready to help—send us a message to confirm compatibility and ensure you’re selecting the exact part for your panel model.