The LX9FF170 is a specific contactor coil from the TeSys F range, designed for 170 V AC control circuits at 40 to 400 Hz with low consumption technology. It is a replacement or spare coil for TeSys F contactors, not a complete contactor — the coil alone, without a built-in suppressor module. Rated for continuous duty in a control panel environment, the LX9FF170 operates within an ambient temperature range of -5 to 55 °C.
The coil draws 690 to 855 VA inrush at 20 °C, then settles to 6.6 to 8.1 VA holding — the inrush figure determines the sizing of the control transformer and the contactor's pick-up reliability, while the hold-in VA governs continuous heat load in the panel. Coil resistance measures 37.55 ohms inrush and 1453 ohms holding at 20 °C, which confirms the low-hold-power design and helps with PLC output drive calculations if a relay interface is used. Operational voltage range is 0.85 to 1.1 times Uc at 55 °C; drop-out occurs between 0.35 and 0.55 Uc. Opening time is 130 ms, closing time 35 ms — the asymmetry matters for sequencing: the slower opening gives the arc more time to extinguish on break, while the fast close minimizes pre-strike wear on the main contacts.
Thermal and mechanical endurance
Heat dissipation runs 5.9 to 7.2 W in the holding state — this is the continuous thermal load the coil adds to the enclosure, relevant for panel thermal calculations when multiple coils are energized simultaneously.