The Schneider Electric LX9FG042 is a specific replacement coil for the TeSys F contactor range, designed for a 42 V AC control circuit operating across 40 to 400 Hz. It is a low-consumption AC coil without a built-in suppressor module, meaning the installer must fit an external RC snubber or varistor across the coil if driving it from a PLC output or solid-state relay that needs protection from back-EMF. The coil draws an inrush of 950 to 1180 VA at 68 °F (20 °C) and holds at 8.9 to 10.9 VA, which is typical for a large-frame contactor; the holding power is low enough to run warm without excessive panel heat.
Sourcing Reality: Obsolete, Sourced to Order
We source it against an RFQ; there is no factory lead time to quote.
Control voltage is 42 V AC, with an operational range of 0.85 to 1.1 Uc (35.7 to 46.2 V) at 131 °F (55 °C). Drop-out occurs between 0.2 and 0.55 Uc (8.4 to 23.1 V). If your control transformer is feeding a long 42 V circuit, voltage drop at the coil terminals must stay above 35.7 V or the contactor may chatter. Opening time is 130 ms; closing time is 35 ms. That 130 ms opening delay is slow for a safety circuit — this coil is not suitable for an emergency-stop contactor that must drop out in under 100 ms. That is a standard industrial duty cycle — fine for conveyors and pumps, not for high-speed pick-and-place. Heat dissipation runs 8 to 9.8 W. In a sealed, uncooled panel with multiple contactors running continuously, that heat adds up. Leave an air gap or use a ventilated enclosure if you are grouping several TeSys F contactors.
Deployment Context: Panel Integration
The TeSys F contactor range is a DIN-rail or screw-panel mounted frame common in motor control centres and industrial control panels. The LX9FG042 coil is the replaceable actuator that snaps onto the contactor base.