Power distributor with a number of lined up power distribution modules (4, 6, 8), with a feed module arranged at front end and with an oppositely arranged signal module and with at least one connection module arranged therebetween, - wherein the feed module comprises a feed connection for a main power line for tapping a feed current, - wherein the connection module is or can be equipped with an actuable circuit breaker and comprises a number of load terminals (126a, 126b) for connection to a load circuit that is interruptable by means of the circuit breaker, - wherein the signal module comprises a first signal connection for a circuit breaker actuated switching signal, and - wherein the power distribution modules (4, 6, 8) are electrically conductively coupled to each other or can be coupled characterized in that the power distribution modules (4, 6, 8) are designed for direct mounting on a support rail, and that a communication line (176, 178) formed by the power distribution modules (4, 6, 8) is provided for carrying a communication signal (D, A), - wherein the feed module comprises a first communication port (58, 60) for feeding the communication signal (D, A), - wherein the connection module is electrically conductively coupled to a communication contact (120, 124) of the circuit breaker, - wherein the circuit breakers of several lined up connection modules are connected in series with respect to the communication contact (120, 124), - wherein the signal module comprises a second communication port (78, 80) for tapping the communication signal (D, A), and - wherein the power distribution modules (4, 6, 8) are cross-wired among each other in a row direction in an electrically conductive manner by means of second contact elements (64, 66, 86, 88, 142, 144, 184, 188) from housing end face to housing end face. - wherein the feed module comprises a feed connection for a main power line for tapping a feed current, - wherein the connection module is or can be equipped with an actuable circuit breaker and comprises a number of load terminals (126a, 126b) for connection to a load circuit that is interruptable by means of the circuit breaker, - wherein the signal module comprises a first signal connection for a circuit breaker actuated switching signal, and - wherein the power distribution modules (4, 6, 8) are electrically conductively coupled to each other or can be coupled characterized in that the power distribution modules (4, 6, 8) are designed for direct mounting on a support rail, and that a communication line (176, 178) formed by the power distribution modules (4, 6, 8) is provided for carrying a communication signal (D, A), - wherein the feed module comprises a first communication port (58, 60) for feeding the communication signal (D, A), - wherein the connection module is electrically conductively coupled to a communication contact (120, 124) of the circuit breaker, - wherein the circuit breakers of several lined up connection modules are connected in series with respect to the communication contact (120, 124), - wherein the signal module comprises a second communication port (78, 80) for tapping the communication signal (D, A), and - wherein the power distribution modules (4, 6, 8) are cross-wired among each other in a row direction in an electrically conductive manner by means of second contact elements (64, 66, 86, 88, 142, 144, 184, 188) from housing end face to housing end face.