Part identity and fit
The LX9FL913 is a specific contactor coil from the TeSys F range, designed as a replacement or spare coil for TeSys F contactors. It is a low-consumption DC coil with a control circuit voltage range of 27...39 V DC. The coil operates without a built-in suppressor module, so an external RC snubber or varistor may be needed across the coil terminals if the control circuit drives inductive loads that could cause voltage spikes. Opening time is 60 ms, closing time is 20 ms — fast enough for most motor switching but not for high-speed counting or precision timing applications where contactor bounce matters.
Electrical and thermal ratings
Rated for 27...39 V DC control voltage with operational limits of 0.85...1.1 Uc (23...43 V DC at 55 °C) and drop-out at 0.3...0.5 Uc (8...20 V DC at 55 °C). This means the coil will hold in reliably down to about 23 V and will drop out cleanly below about 20 V, preventing partial engagement that could weld contacts. Inrush power is 733 W at 20 °C; steady-state hold-in power is 48 W at 20 °C. Heat dissipation runs 22.8...27.8 W, so the panel must allow that thermal load — don't pack it tight against heat-sensitive components without airflow. That's a solid 5 Mcycles for a coil in this class — expect the contactor's electrical life to be the limiting factor in most motor-switching applications. The coil accepts AC control supply from 40 to 400 Hz as well as DC, giving flexibility if the control transformer is shared with other AC-powered devices.