Siemens HFXD63B225AK Three Phase Circuit Breaker

Siemens HFXD63B225AK is a three-pole molded-case circuit breaker from Siemens’ HFXD family, built to protect three-phase power distribution circuits. It is rated for 225 A and a maximum voltage of 600 V, with a thermal-magnetic trip unit to handle overloads and short circuits. The device carries a black finish (AK variant) and is designed for bolt-on mounting in compatible Siemens panelboards and switchgear. It offers a robust interrupting capability of 65 kA at 480 V, making it suitable for higher-short-circuit environments found in industrial settings. As part of the HFXD63B225 lineup, this unit uses a fixed, non-interchangeable trip assembly, ensuring consistent protection characteristics across installations. This breaker is appropriate where fixed, three-phase protection is required in commercial or industrial electrical systems, such as machine control panels, distribution boards, and main feeder applications in warehouses, manufacturing, or processing facilities.