Siemens CFD63B100 - 100 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens CFD63B100—a 3-pole, 100A, 600V bolt-on molded case circuit breaker built to safeguard panelboards and load centers with dependable overcurrent and short-circuit protection. Designed for environments where reliability and secure mounting matter, this unit integrates seamlessly with Siemens OEM panels to deliver a clean, code-compliant installation.

• Bolt-on mounting for a rigid, vibration-resistant bus connection: engineered to stay securely connected in challenging environments, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit: provides stable, repeatable protection by responding to both sustained overloads and instantaneous short circuits, helping minimize nuisance trips while delivering fast fault clearance.
• 3-pole design: ideal for 3-phase systems, delivering coordinated protection across all conductors in commercial and light industrial applications.
• OEM compatibility: crafted to pair with matching Siemens load centers and panelboards for straightforward installation, simplified maintenance, and reliable replacement parts.
• Specifications that cover real-world needs: 100A current rating, 600V voltage rating, molded case construction, and bolt-on mounting—optimized for commercial distribution panels and industrial-capital environments.

The CFD63B100 is more than a spec sheet entry—it’s a practical solution for protecting electrical infrastructure. The combination of a secure bolt-on mount and a thermal-magnetic trip profile means fewer trips due to vibration or minor faults, and faster, decisive action when a genuine fault occurs. This translates to reduced wear on downstream components, safer operation of equipment, and greater confidence during routine maintenance and inspections.

Who benefits most

• Electrical contractors and installers seeking a reliable, OEM-compatible breaker for Siemens panelboards and load centers
• Facilities managers and maintenance teams responsible for commercial spaces, light industrial facilities, and multi-unit buildings
• Homeowners or building owners upgrading 3-phase or three-wire distribution where Siemens equipment is already in use

Use cases and scenario examples

• New installations in Siemens panelboards that require a robust, 3-pole protection device capable of handling 3-phase loads
• Replacement of older, less secure breakers in environments with vibration or frequent equipment cycling
• Outdoor or indoor commercial spaces where dependable short-circuit protection minimizes downtime and equipment damage

Installation and compatibility tips

• Confirm panelboard compatibility with Siemens OEM panels to ensure seamless fit and trip coordination
• Use the bolt-on mounting as designed to maximize mechanical stability in areas with vibration or heavy equipment
• Match the 100A rating to the corresponding branch circuits and verify that the 600V rating aligns with your system voltage and available fault current
• Schedule periodic inspections to verify secure mounting and consistent trip performance in operational panels

Technical snapshot

• Manufacturer: Siemens
• Part number: CFD63B100
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage rating: 100A
• Voltage rating: 600V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection