Schneider Electric LRD04 Thermal Overload Relay

Schneider Electric TeSys LRD04 thermal overload relay, part of the TeSys Deca family, provides motor protection in TeSys D starter configurations and is designed to be used in motor-start circuits to guard against overheating and overcurrent. It is rated for up to 690 VAC operation and covers an adjustable current range of 0.4 to 0.63 A, featuring a 1 normally open plus 1 normally closed (1NO+1NC) contact set and a Class 10A trip rating, which defines its thermal protection characteristics. The device uses screw-clamp terminals for secure field wiring, simplifying installation and connection in control panels. When paired with TeSys D contactors, the LRD04 forms a compact, reliable motor starter suitable for protecting small to mid-size motors in AC applications, delivering straightforward wiring and clear protection signaling within its specified electrical parameters.