The LX9FK928 is a specific contactor coil from the Schneider Electric TeSys F range, designed as a replacement or spare coil for LX9FK-series contactors. It is the electromagnetic actuator that pulls the contactor in and holds it closed, so the contactor's switching ratings (AC-1, AC-3, etc.) are determined by the contactor frame, not this coil — what matters here is the control circuit fit. Rated for a control circuit voltage of 140 to 156 V DC, with operational limits of 0.85 to 1.1 Uc at 131 °F (55 °C) and a dropout threshold of 0.3 to 0.5 Uc. That dropout range is wide — the coil releases somewhere between 42 and 78 V DC — so if your control supply sags, the contactor may drop out earlier than you expect. Verify your DC bus stability against the 0.5 Uc upper dropout limit. Coil technology is listed as without built-in suppressor module. That means no internal flyback diode or RC snubber. You must add external suppression across the coil terminals — a diode for DC or a varistor/RC for AC — to protect the PLC output or relay driving it from the inductive kick when the coil de-energizes. The 60 ms opening time and 50 ms closing time are the mechanical stroke durations; the electrical arc extinction on the main contacts adds its own timing.
Inrush power is 550 VA at 68 °F (20 °C), dropping to a hold-in consumption of 31 VA at the same temperature. That 18:1 ratio means the power supply driving the coil must deliver the inrush surge for the ~50 ms pull-in period, then settle to the much lower hold-in current. A supply rated for 31 VA continuous may not have the headroom for the 550 VA transient — check the peak current capability of your DC supply. Heat dissipation runs 15 to 18.3 W when the coil is held in. In a densely packed panel with multiple contactors side by side, that heat adds up. The TeSys F contactor frame has a rated maximum operating rate of 3600 cycles per hour at 158 °F (70 °C), but the coil's own ambient temperature range is -5 to 55 °C (23 to 131 °F). If your panel ambient exceeds 55 °C, the coil may not hold in reliably — the 0.85 Uc lower limit already assumes 55 °C. For a coil cycled once per minute, that is roughly 19 years of continuous operation. The maximum operating rate of 3600 cycles per hour at 70 °C is the thermal limit for the coil's insulation system under repeated energization.
Because this is a specific coil for the LX9FK contactor frame, there is no direct pin-compatible alternative within the TeSys F range — the coil voltage and mounting pattern are fixed. If the 140-156 V DC control voltage does not match your system, the alternative is to select a different TeSys F coil order code with the correct voltage, which will share the same mechanical interface.