TR-5-N3/3 Thermal Overload Relay: 1.protective performace 2.CB,CE ISO9001 Certificate 3.competitve price TR-5-N3/3 Thermal Overload Relays TR series thermal relay can be used in the circuits of 50Hz or 60Hz, rated working voltage 600V, rated working currrent 0.15-65A for protecting the phase break when the electric motor is overload.