The Schneider Electric TeSys LG7K09B714 is an enclosed direct-on-line (DOL) starter — a self-contained unit combining a contactor and a circuit-breaker with thermal overload protection, all in a single polycarbonate enclosure. It is designed for starting and stopping three-phase induction motors up to 4 kW at 400/415 V AC 50/60 Hz, with a thermal protection adjustment range of 6 to 10 A. Because it is a DOL starter, it applies full line voltage to the motor terminals during start-up, which is the standard method for smaller motors that do not require reduced-voltage starting.
The AC-3 utilisation category (per IEC 60947-4-1) is the standard rating for squirrel-cage motor starting: switching motors during starting, running, and plugging/reversing. The 4 kW at 400/415 V AC figure is the real-world motor sizing limit in AC-3 duty — do not oversize the motor beyond that even if the thermal range seems to allow it, because the contactor's electrical endurance at AC-3 governs. The unit also complies with IEC 60204-1 (safety of machinery — electrical equipment), which is the standard most machine builders reference for control panels. If your panel runs a 24 V DC control bus, you cannot use this unit without an interposing relay or a separate AC supply for the coil. The push-button controls are integrated: a white start button, a black stop button, and a red mushroom-head emergency stop. The cable entries accept 4 x Pg 13 and 2 x Pg 16 glands at both top and bottom, giving flexibility for top-entry or bottom-entry wiring. Overall dimensions are 175 mm wide, 165 mm high, and 177 mm deep — plan your enclosure backplate layout accordingly.