The Schneider Electric LX1FL300 is a replacement contactor coil from the TeSys range, designed for LX1F contactors. It operates on a 300 V AC control circuit at 50/60 Hz and does not include 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.
Rated for 300 V AC control voltage — that is the coil pick-up voltage, not the main power circuit. The AC 50/60 Hz designation means it is intended for line-frequency control transformers; do not use it on a DC control bus or a variable-frequency output. That rate governs how often the contactor can be cycled without overheating the coil — relevant for high-speed indexing or rapid reversing applications.