The Siemens 3VA9243-0JC18 is a SENTRON TA2.2 circular conductor terminal — a wire connector designed specifically for 3VA6 150/250 plug-in and draw-out sockets. It ships as three units per pack, each with an integrated control wire tap and an extended terminal cover with holes for voltage testing.
Where it fits — panel integration
The TA2.2 mounts directly onto 3VA6 150/250 sockets — it is not a stand-alone terminal block. If you are retrofitting a SENTRON 3VA6 draw-out or plug-in assembly, this is the factory-specified conductor terminal. The control wire tap allows a smaller gauge sense or control wire to be landed on the same terminal without a separate splice, which simplifies wiring in high-density switchgear panels.