Coil for TeSys F contactors — 42 V AC/DC, no built-in suppressor
The LX9FJ916 is a specific replacement coil for the TeSys F contactor range, wound for 42 V AC (40–400 Hz) or 42 V DC control. It draws 500 VA inrush at 20 °C, settling to 23 VA holding, with a closed-circuit inductance of 0.22 H. The coil has no built-in suppressor module — you supply the external flyback diode (DC) or RC snubber (AC) across the terminals; omitting it will arc the control contacts on dropout. Operating times are 60 ms opening, 20 ms closing. That 3:1 open-to-close ratio matters in safety circuits where the contactor must drop out faster than it picks — verify your PLC cycle time can tolerate the 60 ms break before re-energizing.
Electrical and thermal limits
Coil resistance measures 4.03 Ω inrush and 43 Ω holding at 20 °C. Heat dissipation runs 11.4 to 13.9 W — enough to raise the temperature inside a crowded enclosure; keep adjacent wiring and smaller components clear of the coil body. The control voltage limits are 0.85–1.1 Uc for pickup (at 55 °C) and 0.3–0.5 Uc for dropout, so a 42 V nominal coil picks reliably at 35.7 V and drops between 12.6 and 21 V. Rated for 10 Mcycles mechanical endurance and a maximum operating rate of 3600 cycles per hour at 70 °C. That rate is the coil's thermal limit, not the contactor's — if the contactor carries heavy motor loads, the switching frequency will be lower.