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The E500DU up to E1250DU are self-supplied electronic overload relays, which means no extra external supply is needed. It offers reliable protection for motors in the event of overload or phase failure. Easy to use like a thermal overload relay and compatible with standard motor applications, the electronic overload relay is convincing, above all, due to its wide setting range, high accuracy, high operational temperature range and the possibility to select a trip class (10E, 20E, 30E). Further features are the temperature com- pensation, trip contact (N.C.), signal contact (N.O.), automatic or manual reset selectable, trip-free mecha- nism, STOP and TEST function and a trip indication. Busbar kits are available as accessory for contactor mounting.