56.203.5155.0 is a feed-through terminal block (WTP 2.5/4 D2/2) designed for DIN rail mounting with push-in spring connection technology. It features a nominal cross section of 4 mm², operates at a rated voltage of 800 V with a rated current of 32 A, and supports a rated impulse voltage of 8 kV. The terminal block is constructed with PA666 thermoplastic insulating housing rated V0 for inflammability, has a width of 5 mm with 4 clamp positions per level, and accommodates wire cross sections from 0.2 mm² to 4 mm² (solid, stranded, and fine-stranded conductors). This product is commonly used in industrial control panels, power distribution systems, and automation applications where reliable electrical connections and compact DIN rail integration are required.