The TeSys WB1GA175 is a low-consumption contactor coil, designed for AC/DC control circuits, and specifically intended for the CV1B and CV3B contactors in the TeSys range.
The 'low consumption' coil type means it draws less inrush and hold current than standard contactor coils, which can be a deciding factor in control transformers with limited VA capacity or in systems with long cable runs where voltage drop is a concern. The AC/DC control circuit type gives flexibility — it accepts either supply, simplifying panel wiring where both voltages are present.