The WB1KB135 is a low-consumption contactor coil from the Schneider Electric TeSys range, designed specifically for the CR1B.33 contactor. It operates on a 250 V DC control circuit, with an average resistance of 61 Ω at 20 °C. This coil draws an inrush power of 380 to 520 W (450 to 620 VA) and settles to a hold-in consumption of just 0.15 to 0.2 W (0.15 to 0.2 VA at 50 to 400 Hz). Heat dissipation runs 7 to 10 W at 50 to 400 Hz on a single phase.
The mechanical durability is rated at 1,200,000 cycles, which gives a reasonable service life for a contactor coil in moderate-duty switching applications.
The inrush power of 380 to 520 W tells you the peak load the control circuit sees during pickup — ensure your DC supply can deliver that transient without dropping below the coil's dropout threshold.