Siemens FXD63B080 - 80 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens FXD63B080 is a rugged 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. At 80 amps and 600V, it’s built to handle the demanding demands of modern electrical systems while providing precise protection against overloads and short circuits.

Overview of capabilities

Designed for reliability in residential, commercial, and light industrial environments, the FXD63B080 combines a secure bolt-on mounting with a thermal-magnetic trip unit. This pairing delivers stable, repeatable protection performance across a range of operating conditions, reducing nuisance trips and maintaining power continuity where it matters most.

Key differentiators that matter in the field

• Bolt-on mounting provides a rigid, vibration-resistant connection to the bus bars, helping maintain electrical integrity even in environments with vibration or movement.
• Thermal-magnetic trip unit offers coordinated protection for both sustained overloads and instantaneous short circuits, helping to quickly isolate faults without compromising system stability.
• OEM-panel compatibility is designed to work seamlessly with matching Siemens OEM load centers and panelboards, simplifying upgrades, replacements, and service work.
• Versatile application suitable for residential, commercial, and light industrial electrical distributions, making it a practical choice for diverse projects and upgrades.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: FXD63B080
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading or expanding panelboards in residential installations that require reliable 3-pole protection for 240V or multi-wire circuits.
• Replacing a failing breaker in commercial electrical panels where stable protection and OEM compatibility are critical.
• Installing in light industrial distribution where vibration resistance and robust mounting help maintain long-term performance.

Installation, maintenance, and practical tips

• Ensure the bolt-on mounting is securely fastened to deliver a solid bus connection and minimize movement that could affect contact integrity.
• Verify compatibility with the existing Siemens OEM load centers and panelboards to preserve correct phasing, trip characteristics, and electrical coordination.
• Use only in suitable panelboard configurations and follow Siemens installation instructions to maintain warranty and performance expectations.
• Routinely inspect for signs of wear, overheating, or corrosion at the mounting points, and replace the unit if any degradation is observed.

Why choose the Siemens FXD63B080

• Reliable, industry-standard protection that pairs a bolt-on, vibration-resistant connection with a thermal-magnetic trip for predictable, fast fault isolation.
• Designed for compatibility with Siemens OEM load centers and panelboards, simplifying upgrades and maintenance without sacrificing performance.
• A practical choice across residential, commercial, and light industrial projects that demand durable, code-compliant overcurrent and short-circuit protection.