SIEMENS Industrial Products SIEMENS OVERLOAD RELAYS May 5, 2015 admin Industrial products, Overload Relays, SIEMENS, SIEMENS OVERLOAD RELAYS SIEMENS OVERLOAD RELAYS Overload Relays 3UA, 3RU STANDARD Version – Thermal Overload Relays: 3UA SIRIUS Version – Thermal Overload Relays: 3RU11