The Schneider Electric WB1HA100 is a low-consumption replacement coil from the TeSys range, designed specifically for CV1B and CV3B contactors. It accepts 100 V AC at 50 Hz or 110 V AC at 60 Hz on the control circuit, with a tolerance band of 0.85 to 1.1 times Uc at up to 55 °C. The coil type is low consumption, and the control circuit accepts both AC and DC supply — a useful flexibility when the control voltage source is not purely sinusoidal.
If the CV1B or CV3B contactor itself is being replaced, the entire contactor assembly may need to be swapped to a current TeSys model with a compatible coil.
The 0.85 to 1.1 Uc tolerance means the coil will hold in at 85 V on a 100 V nominal line and will not overheat at 110 V — useful when line regulation is loose on a factory floor. The 55 °C ambient limit is the operating ceiling for the coil itself; panel temperature near the contactor should stay below that. Because this is a replacement coil, not a complete contactor, verify the existing contactor's coil terminal arrangement and mechanical linkage before ordering. The CV1B and CV3B frames are the only confirmed fit.