The LX9FK919 is a specific contactor coil from the TeSys F range, designed to replace the coil assembly in TeSys F contactors. It operates on a 50-56 V DC control circuit and is classified as low consumption — drawing 550 VA inrush at 20 °C and holding at 31 VA. The coil has no built-in suppressor module, so an external RC snubber or varistor must be added across the coil terminals if the control circuit drives inductive loads that could generate back-EMF. Heat dissipation runs 15-18.3 W — enough to consider ventilation if the contactor is enclosed in a small panel with other heat sources.
Control voltage limits and temperature range
The coil holds in at 50-56 V DC nominal. Operational voltage range is 0.85 to 1.1 times Uc at 55 °C — so it picks up reliably between about 42.5 V and 61.6 V DC. Drop-out occurs between 0.3 and 0.5 Uc at 55 °C, meaning the contactor drops out when the control voltage falls below roughly 15-25 V DC. Ambient operating temperature is -5 to 55 °C.