Siemens CFD63B225 - 225 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Engineered for dependable branch circuit protection, the Siemens CFD63B225 is a 225A, 600V, 3-pole bolt-on molded case circuit breaker designed to secure panelboards and load centers against overcurrent and short-circuit events. Built to withstand the rigors of commercial and industrial environments, it delivers consistent protection where reliability matters most.

Key features that set the CFD63B225 apart

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays solid through equipment start-ups and harsh conditions.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding quickly to short circuits while minimizing nuisance trips from normal temperature fluctuations.
• OEM compatibility designed for seamless integration with matching Siemens OEM load centers and panelboards (and other approved panel assemblies), ensuring reliable fit and streamlined upgrades.
• Versatile protection suitable for residential, commercial, and light industrial electrical distributions that require robust, current-rated circuit protection.

Technical snapshot

• Amperage Rating: 225 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Part Number: CFD63B225

Ideal applications and use cases

The CFD63B225 is purpose-built for protecting branch circuits in panelboards and load centers where high-current, three-phase protection is essential. It’s an excellent choice for upgrading feeders in commercial spaces, safeguarding HVAC equipment, lighting and power distribution, and other heavy-load circuits in light industrial settings. Because it’s designed to be compatible with Siemens and matched OEM panel systems, it simplifies installs and retrofits, helping you achieve compliant, dependable protection without compatibility concerns.

Why this matters for your electrical system

Choosing a 225A, 600V, 3-pole bolt-on breaker with a thermal-magnetic trip unit means you’re prioritizing both protection precision and system durability. The thermal aspect handles standard loading safely, while the magnetic action delivers immediate interruption during short-circuit events—reducing damage to wiring, components, and downstream equipment. The bolt-on design also supports a solid, bus-level connection that resists vibration and arcing risks over time, contributing to longer service life in demanding environments.

Installation and best practices

Ensure the CFD63B225 is installed in a compatible Siemens or OEM-rated panelboard, following all local electrical codes and the manufacturer’s installation guidelines. Verify alignment with your three-phase distribution plan and confirm that the surrounding panel environment can accommodate a 225 A, 3-pole bolt-on device. Regular inspection of mounting security and clearances will help maintain reliable protection for years to come.