The TeSys LX9FJ933 is a specific contactor coil for the TeSys F contactor frame range. It is the replaceable solenoid that pulls in and holds the main power contacts on a TeSys F contactor — the part that actually makes the switching happen. This is not a complete contactor; it is the coil assembly that bolts onto the contactor body. Control circuit voltage is dual-rated: 257…280 V DC or 280…310 V AC 40…400 Hz, with an operational voltage window of 0.85…1.1 Uc at 131 °F (55 °C) and a drop-out threshold of 0.3…0.5 Uc. That means it holds in reliably down to about 218 V DC or 238 V AC, and drops out cleanly between 77 V and 140 V DC or 84 V and 155 V AC — important for sequencing logic where you need a predictable drop-out to trigger a downstream interlock.
Switching performance and thermal load
Opening time is 60 ms, closing time is 20 ms. For a contactor coil, that opening delay is the dominant number — it governs how fast the main contacts separate under fault or normal stop. If your safety circuit needs the contacts open inside 50 ms, this coil will not meet that window alone; account for the full contactor break time. Heat dissipation runs 11.4…13.9 W in the sealed state. That is not trivial in a crowded panel — it raises the ambient temperature inside the enclosure and must be factored into the thermal budget, especially if multiple contactors are ganged. Inrush power is 500 VA at 20 °C, hold-in power is 23 VA at 40…400 Hz.