Siemens CFD63B110 - 110 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens CFD63B110 is a 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. With a 110A rating and a 600V capacity, it’s built to safely interrupt overcurrent and short-circuit conditions, helping keep electrical systems reliable in everyday use and demanding environments alike.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection for consistent electrical contact and long-term reliability in panels subject to motion or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance by automatically adjusting to varying current conditions while reliably tripping on true overcurrent or short circuits.
• OEM-compatible design is matched for Siemens load centers and panelboards, ensuring clean fit, predictable behavior, and simplified maintenance or replacements.
• Versatile applications suitable for residential, commercial, and light industrial installations, making it a practical choice for a wide range of panel configurations.
• Solid electrical protection for branch circuits, reducing the risk of damage to wiring, devices, and downstream equipment by interrupting fault currents quickly and safely.

Technical specifications

• Manufacturer: Siemens
• Part Number: CFD63B110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Residential panelboards upgrading or expanding circuits where a reliable 110A, 3-pole solution is required.
• Commercial electrical rooms needing robust protection for feeder circuits and lighting or receptacle branches.
• Light industrial installations where vibration or mechanical movement is present, benefiting from the secure bolt-on mounting.
• Retrofits or replacements in OEM Siemens load centers to maintain compatibility and consistent protection curves.

Why this breaker stands out

The CFD63B110 merges a rugged mechanical interface with precise protective performance. The bolt-on design reduces the risk of loose connections in environments with vibration, while the thermal-magnetic trip unit ensures the breaker responds quickly and predictably to electrical faults. Its seamless compatibility with Siemens OEM load centers means fewer patchwork solutions and more reliable protection across your electrical distribution system. For engineers and electricians, this breaker offers a straightforward path to compliant, dependable protection in a variety of panel configurations.

Practical tips for optimal performance

• Verify panelboard compatibility with Siemens OEM equipment to maintain consistent trip characteristics and warranty coverage.
• Match the circuit amperage to wire sizing and downstream load requirements to avoid nuisance trips while preserving protection.
• Plan for future expansion by selecting a breaker with an appropriate margin above current loading, while respecting panel rating limits.