The LX4D4JD is a contactor coil from the Schneider Electric TeSys range, designed to energize the contactor armature when 12 V DC is applied to the control circuit. It is the replacement coil for LX4D4-series contactors in the TeSys D and F families, which are common across panel builds for motor starting and load switching.
What the 12 V DC Rating Means for Fit
The 12 V DC control voltage is the coil's pull-in and hold rating. It matches the control voltage of the panel's DC supply — typically a 12 V DC power supply feeding the PLC or relay outputs. Verify that the contactor's coil suppression (if any) is compatible with the DC polarity; a free-wheeling diode across the coil terminals is standard practice to protect the switching device from the inductive kick when the coil de-energizes.
Deployment Context
This coil mounts directly onto the TeSys D or F contactor base, snapping into the coil cradle without tools. The contactor assembly then clips onto a DIN rail inside the control panel. The 12 V DC coil draws a modest inrush current at pull-in, then settles to a lower hold current — the exact values are on the contactor's nameplate, not the coil alone.