Terminal block (1, 101), having at least two or more modular terminals (2a, 2b, 102a, 102b....) arranged in a row, which can be placed on a mounting base, especially a support rail, having the following features: a. the modular terminals (2a,...; 102a,...) each have a substantially disk-like housing (3, 103) with two main sides (3a, 3b), two narrow sides (3d, 3e), a top side and a bottom side, b. at least one of the modular terminals (2a, 102a) is designed as a feed-in terminal (2a, 102a) and for this purpose it has at least one or two first conductor connection apparatuses (7, 8) for the connection of external conductors for the feeding in of one or both plus and minus potentials respectively, and c. the one or more of the others of the modular terminals are designed as distribution board terminals (2b,..., 102b,...) for the distribution of the potential(s), for which purpose they have at least one or more second conductor connection apparatuses (7, 8) for the connection of external conductors for the distribution of the plus or minus potential to consumers, d. wherein the distribution of potential across the several modular terminals of the terminal block occurs by means of one or more cross links, especially cross connection link combs, which is/are inserted into one or more corresponding cross link channel(s), wherein e. the first conductor connection apparatuses of the feed-in terminal for the feeding in of the potential(s) to be fed in are designed to connect conductors of a first cross section, and f. the second conductor connection apparatuses (7, 8) of the distribution board terminals for the connection of the consumers are designed to connect conductors with a smaller cross section relative to the conductors to be connected to the first conductor connection apparatuses, wherein the maximum cross section of the conductors which can be connected to the second conductor connection apparatuses of the distribution board terminals is smaller than the maximum cross section of the conductors which can be connected to the first conductor connection apparatuses (7, 8) of the feed-in terminal (2a, 102a), characterized in that g. all of the modular terminals of the terminal block have the same dimensions in the two directions perpendicular to the direction of modular arrangement (x). a. the modular terminals (2a,...; 102a,...) each have a substantially disk-like housing (3, 103) with two main sides (3a, 3b), two narrow sides (3d, 3e), a top side and a bottom side, b. at least one of the modular terminals (2a, 102a) is designed as a feed-in terminal (2a, 102a) and for this purpose it has at least one or two first conductor connection apparatuses (7, 8) for the connection of external conductors for the feeding in of one or both plus and minus potentials respectively, and c. the one or more of the others of the modular terminals are designed as distribution board terminals (2b,..., 102b,...) for the distribution of the potential(s), for which purpose they have at least one or more second conductor connection apparatuses (7, 8) for the connection of external conductors for the distribution of the plus or minus potential to consumers, d. wherein the distribution of potential across the several modular terminals of the terminal block occurs by means of one or more cross links, especially cross connection link combs, which is/are inserted into one or more corresponding cross link channel(s), wherein e. the first conductor connection apparatuses of the feed-in terminal for the feeding in of the potential(s) to be fed in are designed to connect conductors of a first cross section, and f. the second conductor connection apparatuses (7, 8) of the distribution board terminals for the connection of the consumers are designed to connect conductors with a smaller cross section relative to the conductors to be connected to the first conductor connection apparatuses, wherein the maximum cross section of the conductors which can be connected to the second conductor connection apparatuses of the distribution board terminals is smaller than the maximum cross section of the conductors which can be connected to the first conductor connection apparatuses (7, 8) of the feed-in terminal (2a, 102a), characterized in that g. all of the modular terminals of the terminal block have the same dimensions in the two directions perpendicular to the direction of modular arrangement (x).