a flow of current via two main contact terminals and a control unit in the coil housing for controls the coil current application_number US 201113093257 A description fig1 shows a relay 10 according to the invention which includes a connection unit 12 and a coil housing 14 the relay 10 is a bistable relay the connection unit 12 has two main contact terminals 16 1 16 2 in fig1 a first main contact terminal 16 1 is shown a second main contact terminal 16 2 is concealed by a breakdown protector 18 in the view in fig1 the connection unit 12 also has three control electrodes of which two control electrodes 20 1 20 2 are shown in fig1 a third control electrode is concealed in the rear portion of the relay 10 the coil housing 14 includes a coil arrangement 22 an armature 24 and a control unit 26 the control unit 26 is embodied on an essentially round circuit board which has the same diameter as the coil arrangement 22 in this way the control unit 26 can be integrated compactly with the coil housing 14 and is simultaneously shielded by it against interference fields from outside for controlling the relay 10 a control signal in the form of a direct voltage is applied to the control electrodes 20 1 20 2 the control signal is detected by the control unit 26 which is connected electrically by cushioned contact pins 28 1 28 2 28 3 to the various control electrodes 20 1 20 2 the control unit 26 evaluates the control signal and supplies.