The WB1HA440 is a low-consumption contactor coil from the Schneider Electric TeSys range, designed to mate with CV1B and CV3B contactors. It's the replacement coil you'd order when the original on a TeSys contactor in the field fails — not a standalone part, but the service component that keeps the contactor running. Rated for 440 V AC at 50 Hz and 500 V AC at 60 Hz control circuits, with an operational voltage tolerance of 0.85 to 1.1 times Uc at those frequencies. That means it holds in reliably on a nominal 440V line even if the supply sags to 374V or rises to 484V.
Key ratings for fit verification
Inrush power draw is 155 to 190 W at 20 °C (170 to 200 W for the 2P variant), with inrush VA of 500 to 615 VA at 50 Hz and 560 to 675 VA at 60 Hz. Hold-in power settles to 22 to 35 W (25 to 40 W) and 60 to 95 VA depending on frequency. Average coil resistance is 78.1 ohms at 20 °C, and the closed-circuit inductance is 7.1 H. These numbers matter for sizing the control transformer and verifying the contactor's pick-up curve against your supply.