JRS2 Series Thermal Relay. 1.Rated Voltage:up to 660V 2.Rated Current:up to 630A 3.Standard:IEC60947-4-1 relay JRS2 Series Thermal Relay 1.ApplicationJRS2 thermal relay is suitable for AC 50/60Hz, voltage up to 660V and current up to 630A,general AC motor of long or discontinuous long operation, used as overload protection and hasthe functions of breaking phase protection, temperature ...