The 57.504.0055.7 is a feed-through terminal block designed for DIN rail mounting on TS 35 and TS 32 rails with screw connection termination. It accommodates a nominal cross section of 4 mm² and features a compact 6 mm width with 2 clamp positions per level on a single level configuration. The insulating housing is constructed from PA66 material with UL94 V0 inflammability classification, and the product is explosion-tested for "Ex e" compliance, making it suitable for hazardous area installations. The green-colored contacts and robust design make this terminal block ideal for industrial electrical installations, control panels, and safety-critical applications requiring reliable conductor connection and compliance with international standards.