Siemens CFD63B110L - 110 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens CFD63B110L—a 3-pole, bolt-on molded case circuit breaker designed to deliver unwavering protection for your electrical distribution. With a 110 A rating and a 600 V maximum, this device is purpose-built for reliable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters. It’s the smart choice when you need sturdy, room-to-room protection that you can count on in real-world conditions.

Why the CFD63B110L stands out

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection, reducing the risk of loosening under heavy loads or harsh environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits, helping minimize nuisance trips while ensuring fast fault clearance.
• OEM-compatible design is tailored to work with matching Siemens load centers and panelboards, ensuring consistent trip characteristics and streamlined installation.
• Versatile for multiple settings—suitable for residential, commercial, and light industrial applications, making it a practical upgrade or replacement option across varied projects.

Technical snapshot

• Manufacturer: Siemens
• Part number: CFD63B110L
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage rating: 110 A
• Voltage rating: 600 V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or expanding panelboards in commercial spaces where a reliable 3-phase protection is needed.
• Installing or refreshing loadcenters in light industrial environments with motor-driven equipment.
• Residential/commercial service panels requiring a robust, OEM-supported 3-pole solution for balanced protection.
• Retrofits or replacements in Siemens-based electrical systems to maintain coordinated protection characteristics.

Practical considerations and tips

Choose the CFD63B110L when you need a dependable, OEM-aligned breaker that minimizes downtime and simplifies maintenance. Its bolt-on design makes for a solid, vibration-resistant connection, which is especially beneficial in installations subject to vibration or variable loads. The thermal-magnetic trip unit provides reliable protection across a range of operating conditions, helping to prevent damage from overloads and quickly interrupt faults to protect wiring and connected equipment. When planning your installation, pair this breaker with Siemens panelboards or load centers designed for compatible trip curves to ensure optimal performance and system coordination.

Why choose Siemens for circuit protection

Siemens brings decades of electrical engineering expertise to every breaker, delivering precise protection, durable construction, and compatibility across a wide ecosystem of panelboards and accessories. The CFD63B110L is a purpose-built component within that ecosystem, offering predictable behavior, straightforward installation, and long-term reliability for demanding electrical environments.