The WB1HA480 is a low-consumption contactor coil from the Schneider Electric TeSys range, designed for use with CV1B and CV3B contactors. It operates on a 450 V AC 50 Hz control circuit, drawing an inrush power of 155...190 W (500...615 VA at 50 Hz) and holding in at 22...35 W (60...85 VA at 50 Hz). The coil resistance is 86.03 Ω at 68 °F (20 °C), with a closed-circuit inductance of 8.5 H.
Control circuit voltage and operating limits
Rated for 450 V AC at 50 Hz, the coil's operational voltage limits are 0.85...1.1 Uc at 50 Hz, up to 131 °F (55 °C).
Power consumption profile
The inrush-to-hold power ratio is notable: 155...190 W inrush drops to 22...35 W sealed. In VA terms, the inrush spike of 500...615 VA collapses to 60...85 VA holding. This low-hold design reduces thermal buildup inside the contactor enclosure and lowers the burden on control transformers — relevant when multiple coils share a single control supply. The 0.31 power factor at inrush (0.38 holding) confirms a largely inductive load, so any auxiliary contact suppression or snubber should be rated for AC inductive switching.