Siemens CFD63B175L - 175 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens CFD63B175L — a 175 A, 600 V, 3-pole bolt-on molded case circuit breaker designed for dependable branch circuit protection in panelboards and load centers. This device delivers reliable overcurrent and short-circuit protection in residential, commercial, and light industrial applications, and is engineered to integrate seamlessly with matching OEM Siemens load centers.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact and long-term reliability in varying installation environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance by combining thermal overload protection with instantaneous magnetic trips for short circuits.
• OEM-compatible design ensures compatibility with Siemens load centers and panelboards, simplifying upgrades or replacements without sacrificing performance.
• 3-pole configuration for balanced protection in 3-phase systems, ideal for equipment and circuits that require coordinated phase protection.
• 600 V rating supports a wide range of commercial and light industrial electrical distributions while maintaining safety margins.

Technical snapshot

• Manufacturer: Siemens
• Part Number: CFD63B175L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 175 A
• Voltage rating: 600 V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications and outcomes

The CFD63B175L is purpose-built for protection where reliability and precise trip performance matter. Use it in panelboards and load centers that serve residential feeders, light commercial equipment, and moderate industrial circuits. With its bolt-on mounting, you can achieve a solid, vibration-resistant connection that minimizes bus movement and maintains consistent electrical contact over time. The 3-pole design ensures comprehensive protection across all phases, reducing the risk of unbalanced loads and nuisance trips in sensitive systems.

Why choose this Siemens breaker over alternatives

What sets the CFD63B175L apart is the combination of bolt-on robustness, a thermally timed magnetic trip for accurate protection, and direct compatibility with Siemens OEM panelboards. This means fewer compatibility concerns during upgrades, smoother maintenance, and dependable protection tailored to Siemens’ trip characteristics. It’s a practical, purpose-driven choice for installers and facility managers who value consistent performance and streamlined panel integration.

Installation and best practices

Install the CFD63B175L in compatible Siemens panelboards or load centers using its bolt-on mounting for a secure connection. For optimal protection and reliability, follow standard installation guidelines and Siemens recommendations for mounting, alignment, and circuit protection alignment with your distribution system. If you’re upgrading from a lower amperage or different mounting style, verify panel compatibility and trip coordination with adjacent breakers to maintain cohesive protection across the panel.