The Schneider Electric TeSys WB1KB126 is a low-consumption contactor coil rated for 380...400 V AC at 50...400 Hz. It is a spare part for TeSys contactors, designed to be swapped in when the original coil fails or needs replacement on an existing panel. Sealed operating time is 25 ms, and the coil draws 1100...1400 W inrush on a 4-pole contactor, dropping to 0.15...0.2 W hold-in for a 1-pole configuration. The 197 Ohm average resistance at 68 °F (20 °C) gives a quick check value for field troubleshooting.
Sourcing reality — obsolete part
No official successor order code is listed, so the replacement path is a parametric match to the 380...400 V AC 50...400 Hz coil voltage and TeSys footprint.
The 380...400 V AC control voltage at 50...400 Hz means this coil is meant for a 400 V class control transformer — common in European-spec panels. The wide 50...400 Hz range covers both 50 Hz mains and 400 Hz aircraft/military-derived supplies, but in practice it lives in 50/60 Hz industrial panels. Low-consumption design keeps the hold-in power under 2 W even on a 4-pole contactor, which matters when the control transformer is sized tight or the panel has many coils in parallel. The inrush spike (up to 1400 W) is brief — the 25 ms sealed time means the coil pulls in fast and the power stage drops to hold-in level almost immediately.