The Schneider Electric LE4D09B7 is an enclosed direct-on-line (DOL) starter from the TeSys LE range, rated for a conventional free-air thermal current of 9 A and a control circuit voltage of 24 V AC at 50/60 Hz. It is designed for standard motor-starting applications under utilisation category AC-3, meaning it handles the high inrush of squirrel-cage motors during start-up and then switches the running load. The unit integrates a contactor and a fuse-disconnector in a single polycarbonate enclosure, with a separate thermal overload relay ordered for the assembly.
The 9 A thermal current (Ith) is the continuous current the starter can carry in free air without exceeding temperature limits — this sets the maximum motor full-load current it can serve. For AC-3 duty, the motor power ratings are 4 kW at 380/400/415/440 V AC and 2.2 kW at 220/230 V AC, so it fits standard 4 kW three-phase motors on 400 V lines. The 24 V AC coil is common for control circuits fed from a control transformer; verify your control voltage matches exactly, as the coil is not dual-voltage. The associated fuse rating is 12 A aM (type 10 x 38 mm), providing short-circuit protection coordinated with the starter's breaking capacity. The unit complies with IEC 60947-4-1, the standard for contactors and motor-starters, which covers both the making/breaking capacity and the coordination type.
Cable entries are provided on both top and bottom faces, each accepting ISO 20, 25, 32, or 40 glands, giving flexibility for incoming supply and outgoing motor cable routing. The polycarbonate material is lightweight and corrosion-resistant, but take care with gland torque to avoid cracking the plastic. The push-button controls are integrated into the enclosure face: a green start button and a red stop/reset button. This makes it a standalone operator station for simple start/stop control without a separate panel.