The Schneider Electric TeSys WB1EA048 is a low-consumption contactor coil designed for the CV1B and CV3B contactor frames. It operates on 48 V AC at 50 Hz or 53 V AC at 60 Hz, with a control circuit voltage tolerance of 0.85 to 1.1 Uc at 50/60 Hz below 55 °C. This is a replacement coil, not a complete contactor — you swap it into the existing contactor assembly when the original coil fails or the control voltage needs changing.
The coil draws 90 to 110 W inrush at 20 °C (75 to 95 W on the lower end of the range), and holds in at 13 to 19 W. Inrush VA is 220 to 270 VA at 50 Hz, 225 to 275 VA at 60 Hz. The average DC resistance is 2.22 ohms at 20 °C, and the closed-circuit inductance is 0.15 H. These numbers matter for sizing the control transformer and the fuse or circuit breaker feeding the contactor — the inrush surge is brief but significant, so the protection must be slow-blow or set to ride through the pickup transient. The low-consumption coil design means the hold-in power is roughly one-seventh of the inrush, which keeps the coil temperature down in continuous-duty applications.