The LX9FF350 is a specific contactor coil from the Schneider Electric TeSys F range, designed as a replacement or spare coil for TeSys F contactors. It operates on a 350 V AC control circuit at 40 to 400 Hz and is classed as a low-consumption coil, drawing 690 to 855 VA inrush and 6.6 to 8.1 VA holding at 68 °F (20 °C). The coil's opening time is 130 ms and closing time is 35 ms, with a maximum operating rate of 2400 cycles per hour at 131 °F (55 °C). Mechanical durability is rated at 10 million cycles, and heat dissipation sits between 5.9 and 7.2 W.
Control voltage limits and coil characteristics
The control circuit voltage limits are defined at 131 °F (55 °C): operational range is 0.85 to 1.1 times Uc (298 to 385 V AC), and dropout occurs between 0.35 and 0.55 Uc (123 to 193 V AC). This means the coil will reliably pick up at 298 V and must see voltage drop below 193 V to release, which is typical for AC-operated contactor coils in industrial panels. Average coil resistance is 139.7 ohms inrush and 5139 ohms holding at 68 °F (20 °C). The coil uses AC technology without a built-in suppressor module, so if your application requires surge suppression, you will need to add an external RC snubber or varistor across the coil terminals.
Deployment context
As a TeSys F contactor coil, this part mounts directly onto the corresponding TeSys F contactor frame inside a motor control center or panel enclosure. The coil's 350 V AC control voltage is common in European and some Asian industrial installations where the control transformer secondary is 400 V or 415 V, stepped down through a tap.