The LRD09307: It is built to mount directly onto the TeSys D contactor range, making it a drop-in thermal protection add-on for a motor starter assembly.
Where it is used and what it connects to
This relay snaps onto a TeSys D contactor — common in motor control panels for pumps, conveyors, compressors, and fans — to provide adjustable overload protection without needing a separate enclosure. The solid-state sensing circuit responds to current imbalance and phase loss faster than a traditional bimetal relay, reducing heat buildup in the motor windings during a fault.