Siemens Sirius Termik Röle 1No+1Nc 23-28A; Boy S0 3RU2126-4NB0

Thermal relays are not used alone. Used with fuses or contactors. While fuses provide protection at a certain current value, thermal relays provide protection in the adjusted current region. If we consider the motors in which it is generally used, thermal relays should break the circuit at the allowable point in case of overcurrent, except for the currents drawn at the time of starting current, overload starting or braking.