21.305.0557.0 is a 5-position electrical connector terminal block assembly (4E / 5DS GW type) manufactured from heat-resistant material compliant with IEC 60335-1 standard. The product features a total length of 38.0 mm with a pure white color similar to RAL 9010, and is designed with dual-stage configuration providing 4×8 = 32 mm of primary contact spacing and 3×8 = 24 mm of secondary contact spacing. The connector incorporates glowing-wire resistant material suitable for high-temperature electrical applications. This terminal block is commonly used in industrial electrical installations, appliance manufacturing, and control panel assemblies where reliable multi-position connectivity and thermal stability are required.