JRS16 series thermal relay is suitable for AC 50Hz or 60Hz, main circuit rated voltage up to 660V, current up to 160A, used as protecting AC three-phase motor against overload, and has the functions of breaking phase protection, the manual operated motion current, signal output, temperature compensation. It can antomatically and manually get back, too. The product conforms to GB14048.4, IEC60947-4 standard.