Siemens FXD63B225L is a rugged 225A, 600V, 3-pole bolt-on molded-case circuit breaker crafted to reliably guard your electrical distribution. Designed for steady branch circuit overcurrent and short-circuit protection, it plugs into panelboards and load centers that require durable, exacting protection. Key advantages that set this breaker apart
- Secure bolt-on mounting for a rigid, vibration-resistant bus connection - The bolt-on design anchors the breaker firmly to the bus, reducing movement and ensuring consistent contact even in installations with vibration or ambient motion.
- Thermal-magnetic trip unit delivering stable, repeatable protection - Combines thermal overload sensing with magnetic short-circuit interruption for fast, consistent fault clearance across a range of fault conditions.
- Three-pole configuration for balanced three-phase protection - Ideal for three-phase panels and commercial or light-industrial installations where synchronized protection across all phases matters.
- 600V rating for broader industrial and commercial applications - Suitable for higher-energy distribution environments where robust overcurrent protection is essential.
- OEM-compatible with Siemens load centers and panelboards - Simplifies replacement and service, ensuring dependable compatibility with existing Siemens gear. What this means in practical terms
- Versatile protection across residential, commercial, and light industrial electrical systems - Use it to protect branch circuits in panelboards and load centers, safeguarding equipment, wiring, and occupants.
- Clear, actionable protection in demanding environments - The thermal-magnetic trip provides predictable response to overloads and short circuits, helping to minimize downtime and maintenance headaches.
- Reliable replacement or upgrade path - If you’re upgrading or retrofitting Siemens-compatible installations, the FXD63B225L offers a straightforward, high-assurance option. Technical snapshot
- Manufacturer: Siemens
- Part number: FXD63B225L
- Type: Thermal-magnetic molded-case circuit breaker
- Amperage rating: 225A
- Voltage rating: 600V
- Number of poles: 3
- Mounting style: Bolt-on
- Application: Branch circuit overcurrent and short-circuit protection Ideal use scenarios
- Upgrading panelboards in mid-to-large residential or light commercial buildings that require robust three-phase protection
- Replacing aging or unreliable breakers in Siemens-compatible load centers where a secure mounting and consistent trip behavior are critical
- Deploying in industrial or workshop environments where vibration is a factor and dependable protection is non-negotiable In short, the Siemens FXD63B225L combines a secure bolt-on connection, precise thermal-magnetic protection, and three-pole coverage in a single, reliable package—providing calm, consistent protection for your most important electrical infrastructure.