Impulse switch UC. No standby loss. Either universal control voltage 8 to 230V UC at the control input +A1/A2 or 230V with glow lamp current up to 5mA at the control input (L)/-A2(N). The simultaneous use of two potentials at the control inputs is not permitted. Very low switching noise. No permanent power supply necessary, therefore no standby loss. State-of-the-art hybrid technology combines advantages of nonwearing electronic control with high capacity of special relays. By using a bistable relay coil power loss and heating is avoided even in the on mode. The relay contact can be open or closed when putting into operation. It will be synchronised at first operation. Same terminal connection as the electromechanical impulse switch S12-110-.