The Siemens 3VA9443-0KD00 is a withdrawable unit complete kit — the racking mechanism and cradle assembly that lets a 3-pole 3VA64 circuit breaker be inserted or withdrawn from a panel without disturbing the main bus connections. It belongs to the Accessories and Spare Parts product family, so it is ordered as a separate component rather than integrated into the breaker at the factory. Lifecycle status is active (current), meaning the kit is still in regular production and available through standard Siemens distribution channels.
RoHS compliant since January 1, 2017, and REACH Article 33 duty-to-inform data is available from Siemens for downstream users who need to track SVHC content in their assemblies.