The 57.404.6955.1 is a three-tier installation terminal block from the selos BIT series, designed for high-density wiring in electrical distribution systems. It features screw connections that accept solid conductors from 0.5 to 6 mm² and fine-stranded conductors from 0.5 to 4 mm² (22-10 AWG). This block is rated for 400V and 26A according to VDE standards, and 300V for UL/CSA applications, all within a compact 6 mm width. The configuration provides two line feed-through connections and one ground (PE) connection that interfaces directly with the DIN rail. It is ideal for use in junction boxes and distribution panels where space is limited and reliable connections are critical.