Schneider Electric LRD21C Thermal Overload Relay

Schneider Electric LRD21C TeSys Deca thermal overload relay protects motors and control circuits from overloads by interrupting current when the motor draws more than its preset limit. It belongs to the TeSys LRD/Deca family and is configured for a 12–18 A setting with a class 10A trip, using a 1NO+1NC contact arrangement to open the load path when protection is triggered. The unit features screw-clamp terminals for secure field wiring and is designed for industrial panels with voltages up to 690 VAC in many regions. The LRD21C variant is the 12–18 A, 1NO+1NC, class 10A version used to safeguard mid‑range motors and AC circuits in TeSys starter assemblies. This relay is intended to work alongside Schneider Electric motor protection and control hardware to provide coordinated overload protection in industrial applications.