Siemens FXD63B225 molded‑case circuit breaker is a 3‑pole, 225‑amp device rated for 600 V, designed to provide overcurrent protection in electrical distribution panels. Identified by the FXD63B225 part number, this unit belongs to Siemens’ FXD molded‑case family and is used to protect large feeders and downstream branch circuits in industrial or commercial electrical systems.
